Service Handbook AIR CONDITIONERS CITY MULTI

Transcription

1 AIR CONDITIONERS CITY MULTI Models PUHY-00YMF-C, 0YMF-C PUHY-P00YMF-C, P0YMF-C PUY-00YMF-C, 0YMF-C PUY-P00YMF-C, P0YMF-C PURY-00YMF-C, 0YMF-C PURY-P00YMF-C, P0YMF-C CMB-P0, P0, P06, P08, P00, P0, P06V-E Service Handbook

2 Contents PRECAUTIONS FOR DEVICES THAT USE R0C REFRIGERANT... [] Storage of Piping Material... [] Piping Machining... [] Necessary Apparatus and Materials and Notes on Their Handling.. 6 [] Brazing... [] Airtightness Test... 8 [6] Vacuuming... 8 [] Charging of Refrigerant... 9 [8] Dryer... 9 COMPONENT OF EQUIPMENT... 0 [] Appearance of Components... 0 [] Refrigerant Circuit Diagram and Thermal Sensor... 8 [] Electrical Wiring Diagram... [] Standard Operation Data... [] Function of Dip SW and Rotary SW... TEST RUN... [] Before Test Run... [] Test Run Method... GROUPING REGISTRATION OF INDOOR UNITS WITH REMOTE CONTROLLER... CONTROL... 8 [] Control of Outdoor... 8 [] Control of BC Controller... 6 [] Operation Flow Chart... 6 [] List of Major Component Functions... 0 [] Resistance of Sensor... 6 REFRIGERANT AMOUNT ADJUSTMENT... [] Refrigerant Amount and Operating Characteristics... [] Adjustment and Judgement of Refrigerant Amount... TROUBLESHOOTING... 8 [] Principal Parts... 8 [] BC Controller Disassembly Procedure... [] Self-diagnosis and Countermeasures Depending on the Check Code Displayed... 9 [] LED Monitor Display... 8 PREPARATION, REPAIRS AND REFRIGERANT REFILLING WHEN REPAIRING LEAKS... 6 [] Location of leaks: Extension piping or indoor units (when cooling) 6 [] Location of leaks: Outdoor unit (when heating) CHECK THE COMPOSITION OF THE REFRIGERANT (PURY-P00 0YMF-C only)... 6

3 Safety precautions Before installation and electric work Before installing the unit, make sure you read all the Safety precautions. The Safety precautions provide very important points regarding safety. Make sure you follow them. This equipment may not be applicable to EN6000--: 99 and EN6000--: 99. This equipment may have an adverse effect on equipment on the same electrical supply system. Please report to or take consent by the supply authority before connection to the system. Symbols used in the text Warning: Describes precautions that should be observed to prevent danger of injury or death to the user. Caution: Describes precautions that should be observed to prevent damage to the unit. Symbols used in the illustrations : Indicates an action that must be avoided. : Indicates that important instructions must be followed. : Indicates a part which must be grounded. : Beware of electric shock (This symbol is displayed on the main unit label.) <Color: Yellow> Warning: Carefully read the labels affixed to the main unit. Warning: Use the specified cables for wiring. Make the connections securely so that the outside force of the cable is not applied to the terminals. - Inadequate connection and fastening may generate heat and cause a fire. Have all electric work done by a licensed electrician according to Electric Facility Engineering Standard and Interior Wire Regulations and the instructions given in this manual and always use a special circuit. - If the power source capacity is inadequate or electric work is performed improperly, electric shock and fire may result. Securely install the cover of control box and the panel. - If the cover and panel are not installed properly, dust or water may enter the outdoor unit and fire or electric shock may result. After completing service work, make sure that refrigerant gas is not leaking. - If the refrigerant gas leaks and is exposed to a fan heater, stove, oven, or other heat source, it may generate noxious gases. Do not reconstruct or change the settings of the protection devices. - If the pressure switch, thermal switch, or other protection device is shorted and operated forcibly, or parts other than those specified by Mitsubishi Electric are used, fire or explosion may result.

4 PRECAUTIONS FOR DEVICES THAT USE R0C REFRIGERANT Caution Do not use the existing refrigerant piping. The old refrigerant and refrigerator oil in the existing piping contains a large amount of chlorine which may cause the refrigerator oil of the new unit to deteriorate. Use refrigerant piping made of phosphorus deoxidized copper and copper alloy seamless pipes and tubes. In addition, be sure that the inner and outer surfaces of the pipes are clean and free of hazardous sulphur, oxides, dust/dirt, shaving particles, oils, moisture, or any other contaminant. Contaminants on the inside of the refrigerant piping may cause the refrigerant residual oil to deteriorate. Store the piping to be used during installation indoors and keep both ends of the piping sealed until just before brazing. (Store elbows and other joints in a plastic bag.) If dust, dirt, or water enters the refrigerant cycle, deterioration of the oil and compressor trouble may result. Use ester oil, ether oil or alkylbenzene (small amount) as the refrigerator oil to coat flares and flange connections. The refrigerator oil will degrade if it is mixed with a large amount of mineral oil. Use liquid refrigerant to seal the system. If gas refrigerant is used to seal the system, the composition of the refrigerant in the cylinder will change and performance may drop. Use a vacuum pump with a reverse flow check valve. The vacuum pump oil may flow back into the refrigerant cycle and cause the refrigerator oil to deteriorate. Do not use the following tools that have been used with conventional refrigerants. (Gauge manifold, charge hose, gas leak detector, reverse flow check valve, refrigerant charge base, vacuum gauge, refrigerant recovery equipment) If the conventional refrigerant and refrigerator oil are mixed in the R0C, the refrigerant may deteriorated. If water is mixed in the R0C, the refrigerator oil may deteriorate. Since R0C does not contain any chlorine, gas leak detectors for conventional refrigerants will not react to it. Do not use a charging cylinder. Using a charging cylinder may cause the refrigerant to deteriorate. Be especially careful when managing the tools. If dust, dirt, or water gets in the refrigerant cycle, the refrigerant may deteriorate. If the refrigerant leaks, recover the refrigerant in the refrigerant cycle, then recharge the cycle with the specified amount of the liquid refrigerant indicated on the air conditioner. Since R0C is a nonazeotropic refrigerant, if additionally charged when the refrigerant leaked, the composition of the refrigerant in the refrigerant cycle will change and result in a drop in performance or abnormal stopping. Do not use a refrigerant other than R0C. If another refrigerant (R, etc.) is used, the chlorine in the refrigerant may cause the refrigerator oil to deteriorate.

5 [] Storage of Piping Material () Storage location Store the pipes to be used indoors. (Warehouse at site or owner s warehouse) Storing them outdoors may cause dirt, waste, or water to infiltrate. () Pipe sealing before storage Both ends of the pipes should be sealed until immediately before brazing. Wrap elbows and T s in plastic bags for storage. * The new refrigerator oil is 0 times more hygroscopic than the conventional refrigerator oil (such as Suniso). Water infiltration in the refrigerant circuit may deteriorate the oil or cause a compressor failure. Piping materials must be stored with more care than with the conventional refrigerant pipes.

6 [] Piping Machining Use ester oil, ether oil or alkylbenzene (small amount) as the refrigerator oil to coat flares and flange connections. Use only the necessary minimum quantity of oil! Reason :. The refrigerator oil used for the equipment is highly hygroscopic and may introduce water inside. Notes : Introducing a great quantity of mineral oil into the refrigerant circuit may also cause a compressor failure. Do not use oils other than ester oil, ether oil or alkylbenzene.

7 [] Necessary Apparatus and Materials and Notes on Their Handling The following tools should be marked as dedicated tools for R0C. <<Comparison of apparatus and materials used for R0C and for R>> Apparatus Used Use R R0C Gauge manifold Evacuating, refrigerant filling Current product Charging hose Operation check Current product Charging cylinder Refrigerant charging Current product Do not use. Gas leakage detector Gas leakage check Current product Shared with Ra Refrigerant collector Refrigerant collection R For R0C use only Refrigerant cylinder Refrigerant filling R Identification of dedicated use for R0C : Record refrigerant name and put brown belt on upper part of cylinder. Vacuum pump Vacuum drying Current product Vacuum pump with a check valve Current product Flare tool Flaring of pipes Current product Bender Bending of pipes Current product Application oil Applied to flared parts Current product Torque wrench Tightening of flare nuts Current product Pipe cutter Cutting of pipes Current product Welder and nitrogen cylinder Welding of pipes Current product Refrigerant charging meter Refrigerant charging Current product Vacuum gauge Checking the vacuum degree Current product Can be used by attaching an adapter with a check valve. Ester oil or Ether oil or Alkybenzene (Small amount) Symbols : To be used for R0C only. Can also be used for conventional refrigerants. Tools for R0C must be handled with more care than those for conventional refrigerants. They must not come into contact with any water or dirt. 6

8 [] Brazing No changes from the conventional method, but special care is required so that foreign matter (ie. oxide scale, water, dirt, etc.) does not enter the refrigerant circuit. Example : Inner state of brazed section When non-oxide brazing was not used When non-oxide brazing was used Items to be strictly observed :. Do not conduct refrigerant piping work outdoors on a rainy day.. Apply non-oxide brazing.. Use a brazing material (Bcup-) which requires no flux when brazing between copper pipes or between a copper pipe and copper coupling.. If installed refrigerant pipes are not immediately connected to the equipment, then braze and seal both ends of them. Reasons :. The new refrigerant oil is 0 times more hygroscopic than the conventional oil. The probability of a machine failure if water infiltrates is higher than with conventional refrigerant oil.. A flux generally contains chlorine. A residual flux in the refrigerant circuit may generate sludge. Note : Commercially available antioxidants may have adverse effects on the equipment due to its residue, etc. When applying non-oxide brazing, use nitrogen.

9 [] Airtightness Test No changes from the conventional method. Note that a refrigerant leakage detector for R cannot detect R0C leakage. Halide torch R leakage detector Items to be strictly observed :. Pressurize the equipment with nitrogen up to the design pressure and then judge the equipment s airtightness, taking temperature variations into account.. When investigating leakage locations using a refrigerant, be sure to use R0C.. Ensure that R0C is in a liquid state when charging. Reasons :. Use of oxygen as the pressurized gas may cause an explosion.. Charging with R0C gas will lead the composition of the remaining refrigerant in the cylinder to change and this refrigerant can then not be used. Note : A leakage detector for R0C is sold commercially and it should be purchased. [6] Vacuuming. Vacuum pump with check valve A vacuum pump with a check valve is required to prevent the vacuum pump oil from flowing back into the refrigerant circuit when the vacuum pump power is turned off (power failure). It is also possible to attach a check valve to the actual vacuum pump afterwards.. Standard degree of vacuum for the vacuum pump Use a pump which reaches 0. Torr (00 MICRON) or below after minutes of operation. In addition, be sure to use a vacuum pump that has been properly maintained and oiled using the specified oil. If the vacuum pump is not properly maintained, the degree of vacuum may be too low.. Required accuracy of the vacuum gauge Use a vacuum gauge that can measure up to Torr. Do not use a general gauge manifold since it cannot measure a vacuum of Torr.. Evacuating time Evacuate the equipment for hour after mmhg ( Torr) has been reached. After envacuating, leave the equipment for hour and make sure the that vacuum is not lost.. Operating procedure when the vacuum pump is stopped In order to prevent a backflow of the vacuum pump oil, open the relief valve on the vacuum pump side or loosen the charge hose to drawn in air before stopping operation. The same operating procedure should be used when using a vacuum pump with a check valve. 8

10 [] Charging of Refrigerant R0C must be in a liquid state when charging, because it is a non-azeotropic refrigerant. For a cylinder with a syphon attached For a cylinder without a syphon attached Cylinder Cylinder Cylinder color identification R0C-Gray Charged with liquid refrigerant R0A-Pink Valve Valve Liquid Liquid Reasons :. R0C is a mixture of refrigerants, each with a different evaporation temperature. Therefore, if the equipment is charged with R0C gas, then the refrigerant whose evaporation temperature is closest to the outside temperature is charged first while the rest of refrigerants remain in the cylinder. Note : In the case of a cylinder with a syphon, liquid R0C is charged without turning the cylinder up side down. Check the type of cylinder before charging. [8] Dryer. Replace the dryer when the refrigerant circuit is opened (Ex. Change the compressor, full gas leakage). Be sure to replace the dryer with a CITY MULTI Series Y (For use with R0C). If any other product is used, the unit will be damaged.. Opening the refrigerant circuit after changing to a new dryer is less than hour. The replacement of the dryer should be the last operation performed. 9

11 COMPONENT OF EQUIPMENT [] Appearance of Components Outdoor unit PU(H)Y-(P)00, 0YMF-C Propeller fan Fan motor Heatexchanger(rear) Heatexchanger(front) Control Box Compressor PUHY-YMF-C PUY-P-YMF-C way valve SCC Accumulator SCC Accumulator Drier Compressor Compressor 0

12 PURY-P00 0YMF-C Propeller fan Fan motor Heat exchanger(rear) Heat exchanger(front) Control box Compressor PURY-YMF-C PURY-P-YMF-C way valve SV block Accumulator way valve SV block CS circuit Accumulator SV SV SV SV6 SVSV SV SV6 CV block Drier CV block Compressor Compressor

13 Controller Box FANCON board INV board MAIN board Noise filter Choke coil (L) Terminal block TBA Power Source Terminal block TB Transmission (Centralized control) Terminal block TB Transmission Inteligent Power Module (IPM) G/A board Capacitor (C, C) (Smoothing capacitor) Diode stack (DS) Magnetic contactor (C)

14 MAIN board PUHY / PURY CNTR CNFC CNVCC Power source for control(v) CNS CNS CN0 CN CNVCC Power Source for control - 0V - 0V -6 V -6 V CN Indication distance - Compressor ON/OFF - Trouble CNRS Serial transmission to INV board CND CNS CNN LD Service LED CN0 Power supply L N SW SW SW SWU SWU SW

15 INV board CNVDC - DC-60V CNV Power supply for IPM control CNVCC Power supply (V) CNR CNC Control for C CNL Choke coil CNVCC Power supply - 0V, - 0V -6 V, -6 V CNDR Out put to G/A board CNFAN Control for MF CNTH CNAC Power source L N G SW CNRS Serial transmission to MAIN board CNACCT

16 FANCON board CNFAN CNPOW CNFC G/A board CNE CNDC CNV CNIPM CNDR

17 BC controller CNTR CN0 M-NET transmission CN Power supply EARTH N L CN0 SW SW SW 6

18 RELAY 0 board RELAY board

19 [] Refrigerant Circuit Diagram and Thermal Sensor PUHY-00YMF-C, 0YMF-C SP ACC : Solenoid valve : Orifice : Capillary : Check valve : Thermal sensor : Strainer : Service port : Accumulator TH6 HEX HEX TH TH8 CV 6H SCC O/S ST TH Comp CJ 6HS CP SV SV LEV ST TH MA CJ SLEV SA ST TH CP ST BV Indoor unit BV 8

20 PUY-00YMF-C, 0YMF-C SP ACC : Solenoid valve : Orifice : Capillary : Check valve : Thermal sensor : Strainer : Service port : Accumulator TH6 HEX HEX TH TH8 6H SCC O/S ST Comp CJ 6HS CP SV SV LEV ST TH MA CJ SLEV SA ST TH CP ST BV BV 9

21 PUHY-P00YMF-C, P0YMF-C SP ACC : Solenoid valve : Orifice : Capillary : Check valve : Thermal sensor : Strainer : Service port : Accumulator TH6 SV HEX HEX ST8 SV ST9 TH ST O/S ST TH CV Comp 6H TH0 Drier CP SCC CJ 6HS CP SV SV TH9 TH CP TH8 LEV ST TH CJ 6LS MA SA SLEV ST BV Indoor units ST BV 0

22 PUY-P00YMF-C, 0YMF-C SP ACC : Solenoid valve : Orifice : Capillary : Check valve : Thermal sensor : Strainer : Service port : Accumulator TH6 HEX CV TH SV HEX ST CV 6H CP SCC O/S ST TH Comp TH0 Drier CJ 6HS CP SV SV TH9 TH TH8 LEV ST TH CJ 6LS MA SA SLEV ST BV Indoor units ST BV

23 PURY-00YMF-C, 0YMF-C SP ACC : Solenoid valve : Orifice : Capillary : Check valve : Thermal sensor : Strainer : Service port : Accumulator CJ Solenoid Valves Block Distributor 6HS CJ SV SV SV SV6 CV O/S TH ST6 CP SV SV TH6 HEXb TH HEXf CV 6H 6LS ACC HEXf Comp MA SA HEXf TH0 SLEV CV8 CV9 CV0 CV CV CV CV ST BV CV6 TH BV Check Valves Block SVC SVA SVB Gas/liquid separator TH TH TH TH TH Indoor units 6HS LEV 6HS LEV TH LEV TH6 BC controller CMB-P0V-E

24 6PURY-P00YMF-C, P0YMF-C SP ACC : Solenoid valve : Orifice : Capillary : Check valve : Thermal sensor : Strainer : Service port : Accumulator ST SJ Solenoid Valves Block Distributor 6HS CJ SV SV SV SV6 O/S CP HEXb ST6 TH CV TH SV SV TH6 HEXf CV 6H 6LS ACC HEXf Comp MA SA HEXf TH0 SLEV TH CV8 CV9 CV0 CV CV CV CV ST BV CP TH9 Drier CV6 TH BV CS(Composition Sensing) circuit Check Valves Block SVC SVA SVB Gas/liquid separator TH TH TH TH TH Indoor units 6HS LEV 6HS LEV TH LEV TH6 BC controller CMB-P0V-E

25 [] Electrical Wiring Diagram PU(H)Y-(P)00 0YMF-C SV Solenoid valve (Heat exchanger capacity control) Solenoid valve *, * (Heat exchanger capacity control) TH0 * THHS LD X~0 FB~ MC W U Motor (Compressor) Diode stack Noise Terminal Filter Block TH0 TH9 TH6 TH TH8 TH TH TH LD 6HS 6LS * * Inverter Controller Box BOX BODY Crank case heater (Compressor) SV SV N CN6 X06 (6P) X0 detection circuit Terminal Block SV S NF L L L L L L N TBB L Red L Red L White L White L Black L Black N Blue N Blue BOX BODY CN X0 (6P) X0 Control circuit board (MAIN board) CN8 (P) X0 CN09 (P) CN06 (P) CN0 (P) SLEV LEV ACCT -W CNE (P) BOX BODY BOX BODY BOX BODY CNFC (6P) CNFC (6P) FB N <Difference of appliance> Appliance Name All exists PUHY-P00/0YMF-C PUY -P00/0YMF-C PUHY- 00/0YMF-C PUY - 00/0YMF-C * are not existed * are not existed Green Blue White Red Black Brown Red L Red White Black Blue PE Green/ Yellow TB M M TB CNTR T0 CN (P) CN0 (P) CN0 (8P) CN0 (P) CNH (P) CNL (P) F 0VAC A F CNLV (P) DS CNLV (P) Red White Black R R ZNR C C DCL C C + + R R CNRS (P) CNRS (P) CNVCC (P) CNVCC (6P) X0 CNVCC (6P) Power circuit board (INV board) C CNC (P) X0 CNTH CNR CNL X0 (P) (P) (P) CNFAN (P) CN0V (P) :Compressor ON/OFF :Trouble MF THHS R L R6 6 * and * are not existed 6 <Symbol explanation> Symbol Name 6 DCL ACCT-U, W ~ + ~ ~ V Red White Black Red White Black TBA L L L L L N N PE M M CH SV CN0 (P) CNS CNS CNTR (P) (P) F (P) 0VAC A F X0 CN (P) X0 Refer to the service handbook about the switch operations. ACCT -U IPM P N U V W Gate amp board (G/A board) CNDC (P) CNDR (9P) CNV (P) FB CNVCC (P) CNAC (P) F0 0VAC A F CNVDC (P) CNDR CNV (9P) (P) 0 CNX0 (P) V CN (P) CND (P) CNS (P) CNN (P) S 6 8 ZNR 6 V Yellow Orange Purple Black White Gray FB FB U W N Orange Brown CNACCT (P) DEMAND NIGHT MODE CND Mode - - ON ON Auto HEAT OFF changeover COOL ON OFF Normal OFF * L L L CNPOW (P) F0 0VAC 6.AF F0 0VAC 6.AF F0 0VAC 6.AF C Fan control board (Fancon board) CNFAN (P) CN0 * MF S * SV, SV SV * LEV Electronic expansion valve (Sub-cool coil bypass) SLEV 6HS 6LS * L IPM TH TH TH TH6 TH * DC reactor High pressure switch (Power factor improvement) Current Sensor Varistor Magnetic contactor (Inverter main circuit) Fan motor(radiator panel) -way valve Solenoid valve(discharge-suction bypass) Electronic expansion valve(oil return) High pressure sensor Low pressure sensor Choke coil(transmission) Intelligent power module Discharge pipe temp. detect Thermistor Saturation evapo. temp. detect Pipe temp. detect OA temp. detect liquid outlet temp. detect at Sub-cool coil TH8 bypass outlet temp. detect TH9 * at Sub-cool coil High pressure liquid temp. Compressor shell temp. Radiator panel temp. detect Accumulator liquid level detect Aux. relay Ferrite core Earth terminal MF Fan motor (Heat exchanger) Red White Black 0A 0A * 6H no fuse breaker PU(H)Y-(P)00YMF-C PU(H)Y-(P)0YMF-C Power source N~ 80/00/V 0/60Hz Connect to Indoor and remote controller

26 PURY-(P)00 0YMF-C <Difference of appliance> Appliance Name PURY-P00/0YMF-C All exists PURY- 00/0YMF-C * are not existed <Symbol explanation> Symbol DCL S -way valve SV, SV Solenoid valve(discharge-suction bypass) SV~6 SLEV 6HS 6LS Name DC reactor (Power factor improvement) ACCT-U, W Current Sensor ZNR C MF L IPM TH TH * TH TH6 MC IPM P N U V Gate amp board (G/A board) W TH6 TH TH TH TH LD 6HS 6LS CNE CNDC CNDR CNV (P) (P) (9P) (P) 0 FB FB Black White Red Green Blue White CNACCT (P) CND DEMAND (P) NIGHT MODE CNFAN (P) CN0 Brown Orange FB L L L Fan control board (Fancon board) FB U W N V 8 9 Orange Yellow Black Purple Gray White CNDR (9P) 0 MF Fan motor (Heat exchanger) Refer to the service handbook about the switch operations. * no fuse breaker PURY-(P)00YMF-C PURY-(P)0YMF-C 0A 0A TBA L L Red L L Red Power source N~ 80/00/V 0/60Hz N N Blue N N Blue BOX BODY PE BOX BODY TB M M TB CNS CNS (P) (P) X0 CN X0 (P) CN0 (P) F 0VAC A F Control circuit board (MAIN board) CH SV 6 CNVCC (P) CNAC (P) F0 0VAC A F CNVDC (P) C CNX0 (P) CNC CNTH CNR X0 (P) (P) (P) V : Compressor ON/OFF : Trouble MF CN (P) THHS R L R6 S Black White Red Black White Red PE Green/ Yellow Connect to Indoor and remote controller M M CN (P) L L L N TBB DS ~ F 0VAC A F CNTR T0 CNTR (P) SLEV U V W Motor (Compressor) Red White Black R R ZNR C C C + C DCL R R BOX BODY CNRS (P) CNRS (P) CNVCC (P) 8 CNV (P) CNVCC (6P) X0 CNVCC (6P) Power circuit board (INV board) X0 CNFAN (P) CNL CN0V (P) (P) ~ ~ Red Black Red Brown Inverter Controller Box NF L L White L L White L L Black L L Black SV S CN X0 (6P) X0 SV SV CN6 X06 (6P) X0 SV6 SV CN X08 (6P) X09 6H CN8 (P) X0 detection circuit CN09 (P) CN06 (P) TH0 TH9 L Red L White L Black N Blue CN0 CN0 CN0 CN0 CNH CNL CNLV (P) (P) (8P) (P) (P) (P) (P) ACCT -W ACCT -U BOX BODY BOX BODY CNPOW (P) F0 0VAC 6.AF CNFC (6P) CNFC (6P) Varistor Magnetic contactor (Inverter main circuit) Fan motor(radiator panel) Solenoid valve (Heat exchanger capacity control) Electronic expansion valve(oil return) High pressure sensor Low pressure sensor Choke coil(transmission) Intelligent power module Discharge pipe temp. detect Thermistor Saturation evapo. temp. detect Pipe temp. detect OA temp. detect TH liquid outlet temp. detect at Sub-cool coil TH9 * TH0 * THHS F0 0VAC 6.AF F0 0VAC 6.AF LD Accumulator liquid level detect X,, ~0 Aux. relay FB~ Ferrite core Earth terminal N High pressure liquid temp. Compressor shell temp. Radiator panel temp. detect Terminal Diode Block stack * Terminal Block Noise Filter Crank case heater (Compressor) High pressure switch

27 Symbol explanation Transmission line Shield wire } DC 0V Symbol TR TH 6 LEV, Name Transformer Thermister sensor Expansion valve PS, Pressure sensor TB0 Terminal block (for power source) TB0 Terminal block (for Transmission) Symbol SV A SV B SV C SVM Name Solenoid valve Solenoid valve Solenoid valve Solenoid valve SVB SVA SVC SVB SVA SVC SVB SVA SVC SVB SVA SVC SVM Note:.TB0 is terminal block for transmission. Never connect power line to it.. :SVM is not built in depending on models. 6 6 TB0 L N PE } /N 0V 0V 0Hz Power source EARTH TR 0 V 0 0V TB0 M M CN0 CN0 CNTR X X X0 CN6 X X X CN X6 X X CN8 X8 X X CN9 X CN0 CN0 6 6 CN CN6 LEV LEV CMB-P0V-E PS BC Board CNP PS CNP CN TH TH CN0 6 8 TH CN TH6 6

28 Symbol explanation Transmission line Shield wire } DC 0V Symbol TR TH 6 LEV, Name Transformer Thermister sensor Expansion valve PS, Pressure sensor TB0 Terminal block (for power source) TB0 Terminal block (for Transmission) Symbol SV A SV B SV C SVM Name Solenoid valve Solenoid valve Solenoid valve Solenoid valve SVB SVA SVC SVB SVA SVC SVB SVA SVC SVB SVA SVC SVB SVA SVC Note:.TB0 is terminal block for transmission. Never connect power line to it.. :SVM is not built in depending on models. SVM TB0 L N PE } /N 0V 0V 0Hz Power source EARTH TR 0 V 0 0V TB0 M M CN0 CN0 CNTR X X X0 CN6 X X X CN X6 X X CN8 X8 X X CN9 X0 X9 X CN0 X CN0 CN0 6 6 CN CN6 LEV LEV BC Board CNP CNP CN CN0 6 8 CN CMB-P0V-E PS PS TH TH TH TH6

29 Symbol explanation Transmission line Shield wire } DC 0V Symbol TR TH 6 LEV, Name Transformer Thermister sensor Expansion valve Symbol SV 6A SV 6B SV 6C SVM PS, Pressure sensor TB0 Terminal block (for power source) TB0 Terminal block (for Transmission) Name Solenoid valve Solenoid valve Solenoid valve Solenoid valve SVM SV6C SV6A SV6B SVB SVA SVC SVB SVA SVC SVB SVA SVC SVB SVA SVC SVB SVA SVC Note:.TB0 is terminal block for transmission. Never connect power line to it.. :SVM is not built in depending on models. TB0 L N PE } /N 0V 0V 0Hz Power source EARTH TR 0 V 0 0V TB0 M M 6 6 CNVCC CN0 CN0 CN CN0 CNOUT CN8 CNTR X X X0 CN6 X X X CN X6 X X CN8 CNOUT X8 X X CN9 X0 X9 X CN0 X X X CN X CN0 CN0 6 6 CN CN6 LEV LEV CMB-P06V-E PS BC Board CNP PS CNP CN TH TH CN0 6 8 TH CN TH6 8

30 Symbol explanation Symbol TR TH 6 LEV, Name Transformer Thermister sensor Expansion valve PS, Pressure sensor TB0 Terminal block (for power source) TB0 Terminal block (for Transmission) Symbol SV 8A SV 8B SV 8C SVM Name Solenoid valve Solenoid valve Solenoid valve Solenoid valve Note:.TB0 is terminal block for transmission. Never connect power line to it.. :SVM is not built in depending on models. SVM SV8C SV8A SV8B SVC SVA SVB SV6B SV6A SV6C RELAY Board CN X6 X X CN X X X6 CN9 6 CN Transmission line Shield wire } DC 0V SVB SVA SVC SVB SVA SVC SVB SVA SVC SVB SVA SVC SVB SVA SVC TB0 L N PE } Power source /N 0V 0V 0Hz EARTH TB0 M M CN0 CNOUT CNTR CN8 X X X0 CN6 X X X CN X6 X X CN8 CNOUT X8 X X CN9 X0 X9 X CN0 X X X CN X CN CN V TR 0 0V CNVCC CN0 CN0 CN CN0 CN0 6 6 LEV LEV 6 CMB-P08V-E PS BC Board CNP PS CNP CN TH TH CN0 6 8 TH CN TH6 9

31 Symbol explanation Symbol TR TH 6 LEV, Name Transformer Thermister sensor Expansion valve PS, Pressure sensor TB0 Terminal block (for power source) TB0 Terminal block (for Transmission) Symbol SV 0A SV 0B SV 0C SVM Name Solenoid valve Solenoid valve Solenoid valve Solenoid valve Note:.TB0 is terminal block for transmission. Never connect power line to it.. :SVM is not built in depending on models. SV0B SV0A SV0C SVM SV9B SV9A SV9C SV8C SV8A SV8B SVC SVA SVB SV6B SV6A SV6C RELAY Board CN X0 X9 X9 CN X8 X X8 CN X6 X X CN X X X6 CN9 CN 6 6 CN Transmission line Shield wire } DC 0V SVB SVA SVC SVB SVA SVC SVB SVA SVC SVB SVA SVC SVB SVA SVC TB0 L N PE } Power source /N 0V 0V 0Hz EARTH TB0 M M CN0 CNTR CN8 X X X0 CN6 CNOUT X X X CN X6 X X CN8 CNOUT X8 X X CN9 X0 X9 X CN0 X X X CN X CN CN V TR 0 0V CNVCC CN0 CN0 CN CN0 CN0 6 6 LEV LEV CMB-P00V-E PS BC Board CNP PS CNP CN TH TH CN0 6 8 TH CN TH6 0

32 Symbol TR TH~6 LEV, PS, Name Transformer Thermister sensor Expansion valve Pressure sensor Symbol TB0 TB0 SV~A SV~B SV~C SVM Name Terminal block (for power source) Terminal block (for Transmission) Solenoid valve Solenoid valve Solenoid valve Solenoid valve CN9 CNVCC CN0 X X0 X CN X X X CN X X6 X8 RELAY0 Board CN CN X0 X9 X9 CN X8 X X8 CN X6 X X X X X6 CNOUT CNOUT TB0 M M Shield wire Transmission line } DC 0V SVB SVA SVC SVB SVA SVC SVB Note :. TB0 is transmission terminal block. Never connect power line to it.. :SVM is not built in depending on models. SVA SVC SVM SV0C SV0A SV0B SV9C SV9A SV9B SV8C SV8A SV8B SVC SVB SVA SV6C SV6A SV6B SVB SVA SVC SVB SVA SVC SVB SVA SVC SVB SVA SVC SVB SVA SVC TB0 L N PE } Power source ~/N 0V~0V 0Hz EARTH CN6 CN CN8 CN9 CN0 CN X CN6 CNTR X X X0 X X X X6 X X X8 X X X0 X9 X X X X 8 CMB-P0V-E TR 0 V 0 0V BC Board PS CNP CNVCC CN0 CN0 6 CN CN0 CN8 PS CNP CNOUT CN TH TH CN0 TH TH6 CN CNOUT CN0 CN0 CN 6 LEV LEV

33 Symbol TR TH~6 LEV, PS, Name Transformer Thermister sensor Expansion valve Pressure sensor Symbol TB0 TB0 SV~6A SV~6B SV~6C SVM Name Terminal block (for power source) Terminal block (for Transmission) Solenoid valve Solenoid valve Solenoid valve Solenoid valve CN9 CNVCC CN0 X X0 X CN X X X CN X X6 X8 CN CN X0 X9 X9 CN X8 X X8 CN X6 X X X X X6 CNOUT CNOUT TB0 M M Shield wire Transmission line } DC 0V Note :. TB0 is transmission terminal block. Never connect power line to it.. :SVM is not built in depending on models. CN X0 X9 X CN X X X CN X6 X X RELAY0 Board SVB SVA SVC SVB SVA SVC SVB SVA SVC SVB SVA SVC SVB SVA SVC SV6B SV6A SV6C SVM SV0C SV0A SV0B SV9C SV9A SV9B SV8C SV8A SV8B SVC SVB SVA SV6C SV6A SV6B SVB SVA SVC SVB SVA SVC SVB SVA SVC SVB SVA SVC SVB SVA SVC TB0 L N PE } Power source ~/N 0V~0V 0Hz EARTH CN6 CN CN8 CN9 CN0 CN X CN6 CNTR X X X0 X X X X6 X X X8 X X X0 X9 X X X X TR 0 V 0 0V 6 CNVCC CN0 CN0 CN CN0 CN8 CNOUT CNOUT CN0 CN0 CN 6 LEV LEV 9 CMB-P06V-E BC Board PS CNP PS CNP CN TH TH CN0 TH TH6 CN

34 [] Standard Operation Data () Cooling operation PU(H)Y-00 0YMF-C Items Outdoor unit PUHY-00YMF-C PUY-00YMF-C PUHY-0YMF-C PUY-0YMF-C Ambient temp. Indoor Outdoor DB/WB.0/9.0.0/9.0.0/.0.0/.0 Indoor unit Quantity Quantity in operation Set Condition Model Main pipe Piping Branch pipe m Total piping length Indoor unit fan notch Hi Hi Hi Hi Hi Hi Hi Hi Refrigerant volume kg.. Sectional temperature LEV opening Outdoor unit Pressure Total current Volts/Frequency Indoor unit SC (LEV) Oil return (SLEV) High pressure/low pressure (after O/S) (before MA) Outdoor unit Discharge (TH) Heat exchanger outlet (TH) Accumulator Suction (Comp) TH Shell bottom (Comp) SCC outlet (TH) Inlet Outlet A V V/Hz Pulse kg/cm G (MPa) C / 0/ 0/9 0/ /.80 0./. (.6/0.) (.99/0.6) Bypass outlet (TH8) 8 6 Indoor unit LEV inlet Heat exchanger outlet

35 PU(H)Y-P00 0YMF-C Items Outdoor unit PUHY-P00YMF-C PUY-P00YMF-C PUHY-P0YMF-C PUY-P0YMF-C Ambient temp. Indoor Outdoor DB/WB.0/9.0.0/9.0.0/.0.0/.0 Indoor unit Quantity Quantity in operation Set Condition Model Main pipe Piping Branch pipe m Total piping length Indoor unit fan notch Hi Hi Hi Hi Hi Hi Hi Hi Refrigerant volume kg.. Sectional temperature LEV opening Outdoor unit Pressure Total current Volts/Frequency Indoor unit SC (LEV) Oil return (SLEV) High pressure/low pressure (after O/S) (before MA) Outdoor unit Discharge (TH) Heat exchanger outlet (TH) Accumulator Suction (Comp) CS circuit (TH) CS circuit (TH9) Inlet Outlet Shell bottom (Comp) SCC outlet (TH) A V V/Hz Pulse kg/cm G (MPa) C / 0/ 0/9 0/ /.0.9/.9 (.0/0.9) (./0.8) Bypass outlet (TH8) 8 6 Indoor unit αoc LEV inlet Heat exchanger outlet

36 PURY-00 0YMF-C Items Outdoor unit PURY-P00YMF-C PURY-P0YMF-C Ambient temp. Indoor Outdoor DB/WB.0/9.0.0/9.0.0/.0.0/.0 Indoor unit Quantity Quantity in operation Q ty Model Condition Piping Main pipe Branch pipe m Total piping length Indoor unit fan notch Hi Hi Hi Hi Hi Hi Hi Hi Refrigerant volume kg.9. Compressor volts / Frequency V V/Hz / 0/ 0/9 0/9 Outdoor unit A Sectional temperature Pressure LEV opening Indoor unit BC controller (, ) Oil return High pressure/low pressure BC controller liquid/intermediate Outdoor unit Indoor unit Discharge (TH) Heat exchanger outlet (TH) Accumulator Suction (Comp) Shell bottom (Comp) LEV inlet Inlet Outlet Heat exchanger outlet Pulse kg/cm G (MPa) C /.0 9./.0 (.0/0.9) (.90/0.9) 9.6/9.6 8./8. (.9/.9) (.9/.9)

37 PURY-P00 0YMF-C Items Outdoor unit PURY-P00YMF-C PURY-P0YMF-C Ambient temp. Indoor Outdoor DB/WB.0/9.0.0/9.0.0/.0.0/.0 Indoor unit Quantity Quantity in operation Q ty Model Condition Piping Main pipe Branch pipe m Total piping length Indoor unit fan notch Hi Hi Hi Hi Hi Hi Hi Hi Refrigerant volume kg..9 Compressor volts / Frequency V V/Hz / 0/ 0/9 0/9 Outdoor unit A Sectional temperature Pressure LEV opening Indoor unit BC controller (, ) Oil return High pressure/low pressure BC controller liquid/intermediate Outdoor unit Discharge (TH) Heat exchanger outlet (TH) Accumulator Suction (Comp) CS circuit (TH) Inlet Outlet Shell bottom (Comp) Pulse kg/cm G (MPa) C /..0/. (.0/0.) (./0.0)./..9/.9 (.0/.0) (./.) Indoor unit αoc LEV inlet Heat exchanger outlet

38 Heating operation PUHY-00 0YMF-C Items Outdoor unit PUHY-00YMF-C PUHY-0YMF-C Ambient temp. Indoor Outdoor DB/WB 0.0/ 0.0/.0/6.0.0/6.0 Indoor unit Quantity Quantity in operation Set Condition Model Main pipe Piping Branch pipe m Total piping length Indoor unit fan notch Hi Hi Hi Hi Hi Hi Hi Hi Refrigerant volume kg.. Sectional temperature LEV opening Outdoor unit Pressure Total current Volts/Frequency Indoor unit SC (LEV) Oil return (SLEV) High pressure/low pressure (after O/S) (before MA) Outdoor unit Discharge (TH) Heat exchanger outlet (TH) Accumulator Suction (Comp) TH Inlet Outlet Shell bottom (Comp) A V V/Hz Pulse kg/cm G (MPa) C /8 80/8 /0 / /../. (./0.6) (./0.6) Indoor unit Heat exchanger outlet LEV inlet

39 PUHY-P00 0YMF-C Items Outdoor unit PUHY-P00YMF-C PUHY-P0YMF-C Ambient temp. Indoor Outdoor DB/WB 0.0/ 0.0/.0/6.0.0/6.0 Indoor unit Quantity Quantity in operation Set Condition Model Main pipe Piping Branch pipe m Total piping length Indoor unit fan notch Hi Hi Hi Hi Hi Hi Hi Hi Refrigerant volume kg.. Sectional temperature LEV opening Outdoor unit Pressure Total current Volts/Frequency Indoor unit SC (LEV) Oil return (SLEV) High pressure/low pressure (after O/S) (before MA) Outdoor unit Discharge (TH) Heat exchanger inlet (TH) Accumulator Suction (Comp) CS circuit (TH) CS circuit (TH9) Inlet Outlet Shell bottom (Comp) A V V/Hz Pulse kg/cm G (MPa) C / 0/ 0/9 0/ /../. (.8/0.6) (.0/0.6) Indoor unit αoc Heat exchanger outlet LEV inlet

40 PURY-00 0YMF-C Items Outdoor unit PURY-00YMF-C PURY-0YMF-C Ambient temp. Indoor Outdoor DB/WB 0.0/ 0.0/.0/6.0.0/6.0 Indoor unit Quantity Quantity in operation Q ty Model Condition Piping Main pipe Branch pipe m Total piping length Indoor unit fan notch Hi Hi Hi Hi Hi Hi Hi Hi Refrigerant volume kg.9. Compressor volts / Frequency V V/Hz /8 8/8 60/0 60/0 Outdoor unit total current A....6 Sectional temperature Pressure LEV opening Indoor unit BC controller (, ) Oil return High pressure/low pressure BC controller liquid/intermediate Outdoor unit Indoor unit Discharge (TH) Heat exchanger outlet (TH) Accumulator Suction (Comp) Shell bottom (Comp) LEV inlet Inlet Outlet Heat exchanger outlet Pulse kg/cm G (MPa) C /.6 8.0/. (.8/0.) (.6/0.6)./.0.0/.0 (./.) (.6/.)

41 PURY-P00 0YMF-C Items Outdoor unit PURY-P00YMF-C PURY-P0YMF-C Ambient temp. Indoor Outdoor DB/WB 0.0/ 0.0/.0/6.0.0/6.0 Indoor unit Quantity Quantity in operation Q ty Model Condition Piping Main pipe Branch pipe m Total piping length Indoor unit fan notch Hi Hi Hi Hi Hi Hi Hi Hi Refrigerant volume kg..9 Compressor volts/frequency V V/Hz /80 80/80 0/9 0/9 Outdoor unit total current A....6 Sectional temperature Pressure LEV opening Indoor unit BC controller (, ) Oil return High pressure/low pressure BC controller liquid/intermediate Outdoor unit Discharge (TH) Heat exchanger outlet (TH) Accumulator Suction (Comp) CS circuit Inlet Outlet (TH) Shell bottom (Comp) Pulse kg/cm G (MPa) C /.6 8.0/. (.96/0.8) (.86/0.)./.0.0/.0 (.86/.) (.6/.) Indoor unit αoc LEV inlet Heat exchanger outlet

42 [] Function of Dip SW and Rotary SW () Outdoor unit PU(H)Y-00 0YMF-C Switch SWU SW SW ~ ~8 9~0 6 8 Function address setting For self diagnosis/ operation monitoring Centralized control switch Deletion of connection information. Deletion of error history. Disregard ambient air sensor errors, liquid overflow errors. Forced defrosting Defrost prohibited timer Function according to switch operation Switch set timing When off When on When off When on Set on ~00 with the dial switch. LED monitering display Centralized control not connected. Storing of refrigeration system connection information. Errors valid. Ordinary control min. Centralized control connected. Deletion of refrigeration system connection information. Deletion Disregard errors. Start forced defrosting. 90 min. Before power is turned on. During normal operation when power is on. Should be set on OFF. Before power is turned on. Before power is turned on. During normal operation when power is on. During normal operation when power is on. During normal operation when power is on. 0 minutes or more after compressor starts. During normal operation when power is on. (Except during defrosting) SW SW- Function valid/ invalid Indoor unit test operation Defrosting start temperature of TH. Defrosting end temperature of TH. Opening angle of IC except when heater thermostat is ON during defrosting. SW- Function invalid Stop all indoor units. - C 8 C (no operation) SW- Function valid All indoor units test operation ON. 0 C C 000 During normal operation when power is on. When SW- is ON after power is turned on. During normal operation when power is on. During normal operation when power is on. (Except during defrosting) SW Models Target Pd (High pressure) Models PUHY-YMF-C 8kg/cm G (.6MPa) Model 00 PUY-YMF-C 0kg/cm G (.96MPa) Model 0 When switching on the power. During normal operation when power is on. When switching on the power. Note: SWU~=00 when shipped from the factory. Other factory settings are indicated by shaded portions. If the address is set from 0 to 0, it automatically becomes 00.

43 PUHY-P00 0YMF-C Switch SWU SW SW ~ ~8 9~0 6 8 Function address setting For self diagnosis/ operation monitoring Centralized control switch Deletion of connection information. Deletion of error history. Disregard ambient air sensor errors, liquid overflow errors. Forced defrosting Defrost prohibited timer Function according to switch operation Switch set timing When off When on When off When on Set on ~00 with the dial switch. LED Monitering Display Centralized control not connected. Storing of refrigeration system connection information. Errors valid. Ordinary control 9 min. Centralized control connected. Deletion of refrigeration system connection information. Deletion Disregard errors. Start forced defrosting. 90 min. Before power is turned on. During normal operation when power is on. Should be set on OFF. Before power is turned on. Before power is turned on. During normal operation when power is on. During normal operation when power is on. During normal operation when power is on. 0 minutes or more after compressor starts. During normal operation when power is on. (Except during defrosting) SW 9 0 SW- Function valid/ invalid Indoor unit test operation Defrosting start temperature of TH. Defrosting end temperature of TH. Opening angle of IC except when heater thermostat is ON during defrosting. SW- Function invalid Stop all indoor units. C 8 C (no operation) SW- Function valid All indoor units test operation ON. C C 000 During normal operation when power is on. When SW- is ON after power is turned on. During normal operation when power is on. During normal operation when power is on. (Except during defrosting) SW Models Target Tc (High pressure) at Heating Models SW- Function valid/ invalid Configuration compensation value PUHY-P-YMF-C 9 C Model P00 Invalid PUY-P-YMF-C C Model P0 Valid Changes as shown below by on off change 0% % 6% 9% % 6% % 0% When switching on the power. During normal operation when power is on. When switching on the power. During normal operation when power is on. when SW- in ON. Note: SWU~=00 when shipped from the factory. Other factory settings are indicated by shaded portions. If the address is set from 0 to 0, it automatically becomes 00.

44 PURY-00 0YMF-C Switch SWU SW SW ~ ~8 9~0 6 8 Function address setting For self diagnosis/ operation monitoring Centralized control switch Deletion of connection information. Deletion of error history. Disregard ambient air sensor errors, liquid overflow errors. Forced defrosting Defrost prohibited timer Function according to switch operation Switch set timing When off When on When off When on Set on ~00 with the dial switch. LED monitering display Centralized control not connected. Storing of refrigeration system connection information. Errors valid. Ordinary control min. Centralized control connected. Deletion of refrigeration system connection information. Deletion Disregard errors. Start forced defrosting. 90 min. Before power is turned on. During normal operation when power is on. Should be set on OFF. Before power is turned on. Before power is turned on. During normal operation when power is on. During normal operation when power is on. During normal operation when power is on. 0 minutes or more after compressor starts. During normal operation when power is on. (Except during defrosting) SW SW SW- Function valid/ invalid Indoor unit test operation Defrosting start temperature of TH. Defrosting end temperature of TH. Pump down operation Target Td (High pressure) at Heating Models SW- Function invalid Stop all indoor units. 6 C 8 C Invalid 9 C Model 00 SW- Function valid All indoor units test operation ON. C C Valid C Model 0 During normal operation when power is on. When SW- is ON after power is turned on. During normal operation when power is on. During normal operation when power is on. (Except during defrosting) During compressor stop when power is on. During normal operation when power is on. When switching on the power. Note: SWU~=00 when shipped from the factory. Other factory settings are indicated by shaded portions. If the address is set from 0 to 0, it automatically becomes 00.

45 PURY-P00 0YMF-C Switch SWU SW SW ~ ~8 9~0 6 8 Function address setting For self diagnosis/ operation monitoring Centralized control switch Deletion of connection information. Deletion of error history. Disregard ambient air sensor errors, liquid overflow errors. Forced defrosting Defrost prohibited timer Function according to switch operation Switch set timing When off When on When off When on Set on ~00 with the dial switch. LED monitering display Centralized control not connected. Storing of refrigeration system connection information. Errors valid. Ordinary control min. Centralized control connected. Deletion of refrigeration system connection information. Deletion Disregard errors. Start forced defrosting. 90 min. Before power is turned on. During normal operation when power is on. Should be set on OFF. Before power is turned on. Before power is turned on. During normal operation when power is on. During normal operation when power is on. During normal operation when power is on. 0 minutes or more after compressor starts. During normal operation when power is on. (Except during defrosting) SW SW SW- Function valid/ invalid Indoor Test operation Defrosting start temperature of TH. Defrosting end temperature of TH. Pomp down operation Target Tc (High pressure) at Heating Models SW- function valid/ Invalid Configuration compensation value SW- Function invalid Stop all indoor units. 8 C 8 C Invalid 9 C Model P00 Invalid SW- Function valid All indoor units test operation ON. C C Valid C Model P0 Valid Changes as shown below by on off change 0% % 6% 9% % 6% % 0% During normal operation when power is on. When SW- is ON after power is turned on. During normal operation when power is on. During normal operation when power is on. (Except during defrosting) During compressor stop when power is on. During normal operation when power is on. When switching on the power. During normal operation when power is on. when SW- in ON. Note: SWU~=00 when shipped from the factory. Other factory settings are indicated by shaded portions. If the address is set from 0 to 0, it automatically becomes 00.

46 () Indoor unit DIP SW, Switch SW name Operation by SW Switch set timing OFF ON OFF ON Remarks Room temp. sensor position Indoor unit inlet Built in remote controller Clogged filter detect. None Provided Filter duration 00h 00h OA intake Ineffective Effective Always ineffective for PKFY-P.VAM SW 6 Remote display select. Humidifier control Fan output display At stationary heating Thermo. ON signal display Always at heat. Heating thermo. OFF airflow Very low speed Low speed 8 Heating thermo. OFF airflow SW- setting Set airflow 9 Power failure automatic return Ineffective Effective 0 Power source start/stop Ineffective Effective Model selection Louver Cooling capacity saving for PKFY-P. VAM, effective/ineffective Heat pump None Cool.only Provided At unit stopping (at remote controller OFF) Vane None Provided Vane swing function None Provided Not provided for PKFY-P.VAM Provided for PLFY-P.VGM (ON) setting SW Vane horizontal angle st setting nd setting 6 Vane angle set for cooling Down blow B, C Horizontal Always down blow B,C for PKFY-P.VAM Horizontal (ON) setting for PLFY-P.VLMD 8 Heating deg up Effective Ineffective Ineffective (ON) setting for floor standing 9 0 Note : The shaded part table below.) indicates the setting at factory shipment. (For the SW not being shaded, refer to the Model PLFY-P Switch VBM-A VLMD-A VKM-A OFF ON SW 6 OFF ON OFF ON OFF ON SW 6 8 OFF ON PEFY-P PDFY-P PFFY-P PCFY-P PKFY-P VML-A VMH-A 0~80VMM-A 00~0VMM-A VM-A VLRM-A, VLEM-A VGM-A VAM-A VGM-A OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF OFF OFF ON ON OFF ON OFF OFF ON OFF Note : The DipSW setting is only effective during unit stopping (remote controller OFF) for SW,, and commonly and the power source is not required to reset.) : When both SW- and SW-8 are being set to ON, the fan stops at the heating thermostat of OFF. Setting of DIP SW Model P0 P P P0 P0 P6 Capacity (model name) code SW setting ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF Model P P80 P00 P P0 P00 P0 Capacity (model name) code SW setting ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF

47 Setting of DIP SW Setting of DIP SW Model PMFY-P-VBM-A PLFY-P-VLMD-A PDFY-P0 ~ 80VM-A PLFY-P0 ~ 6VKM-A PLFY-P80 ~ VKM-A PCFY-P-VGM-A PKFY-P-VGM-A PKFY-P-VAM-A PEFY-P0 ~ 80VMM-A PFFY-P-VLEM-A, P-VLRM-A PEFY-P0 ~ VML-A PEFY-P0 ~ 0VMH-A PEHY-P00 0VMH-A PDFY-P00 VM-A PEFY-P00 ~ 0VMM-A Circuit board used Phase control Relay selection SW ON OFF ON OFF ON OFF ON OFF OFF OFF OFF ON ON OFF OFF ON OFF ON OFF ON OFF OFF ON ON ON ON OFF OFF OFF OFF OFF ON ON ON OFF OFF OFF ON OFF OFF OFF OFF ON ON ON ON OFF 0V 0V Switch Function Operation by switch Switch set timing SWA Ceiling height setting (PLFY-P-VKM-A) * The ceiling height is changed by SWB setting. (PCFY-P-VGM-A) Ceiling height. m.8 m. m (PDFY-P0 ~ 80VM-A, PEFY-P0 ~ 80VMM-A) Always after powering SWA External static pressure setting 00Pa 0Pa 0Pa Always after powering * For other models, change the setting of static pressure by replacing the connector. (PLFY-P-VLMD-A) SWA For options * As this switch is used by interlocking with SWC, refer to the item of SWC for detail. Always after powering SWB Setting of air outlet opening (PLFY-P-VKM-A) -way -way -way SWA SWB -way. m.8 m.8 m -way.0 m. m. m -way. m.0 m. m Always after powering (PLFY-P-VKM-A, PCFY-P-VGM-A, PKFY-P-VGM-A, PDFY-P-VM-A) SWC Airflow control Option Standard * Set to the option to install the high efficiency filter Always after powering 6

48 TEST RUN [] Before Test Run () Check points before test run Neither refrigerant leak nor loose power source/ transmission lines should be found. Confirm that the resistance between the power source terminal block and the ground exceeds MΩ by measuring it with a DC00V megger. Do not run if it is lower than MΩ. Note) Never apply the megger to the MAIN board. If applied, the MAIN board will be broken. Confirm that the Ball valve at both gas and liquid sides is being fully opened. Note) Certainly close the cap. Be sure that the crankcase heater has been powered by turning the main power source on at least hours before starting the test run. The shorter powering time causes compressor trouble. () Caution at inverter check Because the inverter power portion in outdoor unit electrical part box have a lot of high voltage portion, be sure to follow the instructions shown below. During energizing power source, never touch inverter power portion because high voltage (approx. 80V) is applied to inverter power portion. When checking, Shut off main power source, and check it with tester, etc. Allow 0 minutes after shutting off main power source. Open the MAIN board mounting panel, and check whether voltage of both ends of electrolytic capacitor is 0V or less.

49 () Check points for test run when mounting options Built-in optional parts Content of test run Check point Result Mounting of drain water lifting-up mechanism Release connector of pump circuit, check error detection by pouring water into drain pan water inlet. Local remote controller displays code No. 0, and the mechanism stops. No overflow from drain pan. After that, connect connector of circuit. Drain water comes out by operations of drain pump. Check pump operations and drainage status in cooling (test run) mode. Sound of pump operations is heard, and drain water comes out. Mounting of permeable film humidifier Check humidifier operations and water supply status in heating (test run) mode. No water leak from connecting portions of each water piping. Water is supplied to water supply tank, and float switch is operating. () Attention for mounting drain water lifting-up mechanism Work Content of test run Check point Result Disassembling and assembling of drain water lifting-up mechanism Lead wire from control box not damaged. Rubber cap properly inserted to drain water outlet of drain pan? Insulation pipe Insulation pipe of gas and liquid pipes dealt with as shown in the right figure? Drain pan and piping cover mounted without gap? No gap Drain pan hooked on cut projection of the mechanism? Mounting of float switch Float switch installed without contacting with drain pan? Float switch moves smoothly. Float switch is mounted on mounting board straightly without deformation. Float switch does not contact with copper pipe. Electric wiring No mistakes in wiring? Wiring procedure is exactly followed. Connectors connected surely and tightly? Connector portion is tightly hooked. No tension on lead wire when sliding control box? 8

50 () Check points for system structure ex. PURY-00YMF-C Check points from installation work to test run. Classification Portion Check item Trouble Installation and piping Instruction for selecting combination of outdoor unit, and indoor unit followed? (Maximum number of indoor units which can be connected, connecting model name, and total capacity.) Not operate. Follow limitation of refrigerant piping length? For example, 0m or less (total length : 0m) at the farthest. Connecting piping size of branch piping correct? Refrigerant piping diameter correct? Not cool (at cooling). Not heat (at heating). Refrigerant leak generated at connection? Not cool, not heat, error stop. 6 Insulation work for piping properly done? Condensation drip in piping. Specified amount of refrigerant replenished? Not cool, not heat, error stop. 8 Pitch and insulation work for drain piping properly done? Water leak, condensation drip in drain piping. Power source wiring Specified switch capacity and wiring diameter of main power source used? Error stop, not operate. Proper grounding work done on outdoor unit? Electric shock. The phases of the L line (L, L, L) correct? Error stop, not operate. L line and N line connected correct? Some electric parts should be damaged. 9

51 STAND BY DEFROST Hr. STAND BY DEFROST Hr. CENTRALLY CONTROLLED D A I L Y ON OFF AUTO OFF CLOCK CHECK REMAINDER C FILTER CHECK MODE CENTRALLY CONTROLLED D A I L Y ON OFF C AUTO OFF CLOCK CHECK REMAINDER FILTER CHECK MODE C ERROR CODE TEST RUN NOT AVAILABLE LIMIT TEMP. C ERROR CODE TEST RUN LIMIT TEMP. NOT AVAILABLE TEMP ON/OFF TEMP ON/OFF CLOCK ON OFF FILTER CLOCK ON OFF FILTER CHECK TEST CHECK TEST PAR-FMEA TIMER SET PAR-FMEA TIMER SET Classification Transmission line System set Before starting Portion Check item Limitation of transmission line length followed? For example, 00m or less (total length : 00m) at the farthest. Erroneous operation, error stop..mm or more transmission line used? (Remote controller 0m or less 0.mm ) Erroneous operation, error stop. -core cable used for transmission line? Error stop in case multiple-core cable is used. Transmission line apart from power source line by cm or more? Erroneous operation, error stop. One refrigerant system per transmission line? 6 The short circuit connector is changed form CN to CN0 on the MAIN board when the system is centralized control? (Just one outdoor unit. Not all outdoor units.) No connection trouble in transmission line? 8 Connection of wrong remote controller line terminals? MA Remote controller : TB M-NET Remote controller : TB Address setting properly done? (M-NET Remote controller, indoor unit and outdoor unit.) Setting of address No. done when shutting off power source? Address numbers not duplicated? Turned on SW-8 on indoor unit circuit board when mounting room thermistor sensor? Refrigerant piping ball valve (Liquid pressure pipe, gas pressure pipe) opened? Turn on power source hours before starting operations? Not operate. Not operate. Trouble Error stop or not operate. Never finish the initial mode. Error stop or not operate. Can not be properly set with power source turned on. Not operate. Set temperature not obtained at heating operations (Thermostat stop is difficult) Error stop. Error stop, compressor trouble. 0

52 [] Test Run Method Operation procedure Turn on universal power supply at least hours before getting started Displaying HO on display panel for about two minutes Press TEST RUN button twice Displaying TEST RUN on display panel Press selection button Make sure that air is blowing out Press select button to change from cooling to heating operation, and vice versa Make sure that warm or cold air is blowing out Press adjust button Make sure that air blow is changed 6 Press or button to change wind Make sure that horizontal or downward blow is adjustable. Make sure that indoor unit fans operate normally 8 Make sure that interlocking devices such as ventilator operate normally if any 9 Press ON/OFF button to cancel test run Stop operation Note : If check code is displayed on remote controller or remote controller does not operate normally. : Test run automatically stops operating after two hours by activation of timer set to two hours. : During test run, test run remaining time is displayed on time display section. : During test run, temperature of liquid pipe in indoor unit is displayed on remote controller room temperature display section. : When pressing adjust button, depending on the model, NOT AVAILABLE may be displayed on remote controller. However, it is not a malfunction. 6: When pressing or button, depending on the model, NOT AVAILABLE may be displayed on remote controller. However, it is not a malfunction.

53 GROUPING REGISTRATION OF INDOOR UNITS WITH M-NET REMOTE CONTROLLER () Switch function The switch operation to register with the remote controller is shown below: C Switch to assign indoor unit address STAND BY DEFROST CENTRALLY CONTROLLED Hr D A I L Y ON OFF C AUTO OFF CHECK CLOCK REMAINDER FILTER CHECK MODE TEST RUN ERROR CODE NOT AVAILABLE LIMIT TEMP. C TEMP ON/OFF F Delete switch G Registered mode selector switch E Confirmation switch PAR-FMEA CLOCK ON OFF TIMER SET FILTER CHECK TEST A Registration/ ordinary mode selector switch D Registration switch B Registration/ ordinary mode selector switch H Switch to assign interlocked unit address Symbol Name of switch Name of actual switch Description Registration/ordinary mode selection switch Switch to assign indoor unit address A + B C FILTER + of TEMP This switch selects the ordinary mode or registered mode (ordinary mode represents that to operate indoor units). * To select the registered mode, press the FILTER + switch continuously for over seconds under stopping state. [Note] The registered mode can not be obtained for a while after powering. Pressing the FILTER + switch displays CENTRALLY CONTROLLED. This switch assigns the unit address for INDOOR UNIT ADDRESS NO. Registration switch D TEST RUN This switch is used for group/interlocked registration. Confirmation switch E This switch is used to retrieve/identify the content of group and interlocked (connection information) registered. Delete switch F CLOCK ON OFF This switch is used to retrieve/identify the content of group and interlocked (connection information) registered. Registered mode selector switch G This switch selects the case to register indoor units as group (group setting mode) or that as interlocked (interlocked setting mode). *The unit address is shown at one spot for the group setting mode while at two spots for the interlocked setting mode. Switch to assign interlocked unit address H of TIMER SET This switch assigns the unit address of OA UNIT ADDRESS NO.

54 () Attribute display of unit At the group registration and the confirmation/deletion of registration/connection information, the type (attribute) of the unit is displayed with two English characters. Display Type (Attribute) of unit/controller Indoor unit connectable to remote controller Outdoor unit Local remote controller System controller (MJ) [Description of registration/deletion/retrieval] The items of operation to be performed by the remote controller are given below. Please see the relating paragraph for detail. Group registration of indoor unit The group of the indoor units and operating remote controller is registered. It is usually used for the group operation of indoor units with different refrigerant system. Retrieval/identification of group registration information of indoor units The address of the registered indoor units in group is retrieved (identified). Retrieval/identification of registration information The connection information of any unit (indoor/outdoor units, remote controller or the like) is retrieved (identified). Deletion of group registration information of indoor units The registration of the indoor units under group registration is released (deleted). Deletion of the address not existing This operation is to be conducted when 660 error (No ACK error) is displayed on the remote controller caused by the miss setting at test run, or due to the old memory remained at the alteration/modification of the group composition. Caution: When MELANS (MJ-0MTRA for example) is being connected, do not conduct the group/pair registration using the remote controller. The group/pair registration should be conducted by MELANS. (For detail, refer to the instruction exclusively prepared for MELANS.)

55 () Group registration of indoor unit ) Registration method Group registration of indoor unit... The indoor unit to be controlled by a remote controller is registered on the remote controller. [Registration procedure] With the remote controller under stopping or at the display of HO, continuously press the FILTER + switch (A + B) at the same time for seconds to change to the registration mode. (See the figure below.) Assign the indoor unit address to INDOOR UNIT ADDRESS NO. by operating the (Room temperature adjustment) (C). Then press the TEST RUN switch (D) to register. In the figure below, the INDOOR UNIT ADDRESS NO. is being set to 00. After completing the registration, press the FILTER + switch (A + B) at the same time for seconds to change to the original ordinary mode (with the remote controller under stopping). Ordinary mode Remote controller under stopping HO under displaying C INDOOR UNIT ADDRESS NO ERROR CODE OA UNIT ADDRESS NO C INDOOR UNIT ADDRESS NO ERROR CODE OA UNIT ADDRESS NO Group setting mode C ERROR CODE OA UNIT ADDRESS NO Registration complete + C ERROR CODE OA UNIT ADDRESS NO Indicates the type of unit (Indoor unit in this case) Registration error TEMP ON/OFF CLOCK ON OFF FILTER C ERROR CODE OA UNIT ADDRESS NO PAR-FMEA TIMER SET CHECK TEST 88 flickers indicating registration error. (when the indoor unit registered is not existing) Assign the address (C) Change to the registration mode (A + B) Press the registration switch (D) Confirm the indoor unit address No. Confirm the connection of the transmission line. System example Indoor units Group Remote controller

56 ) Method of retrieval/confirmation Retrieval/confirmation of group registration information on indoor unit... The address of the indoor unit being registered on the remote controller is displayed. [Operation procedure] With the remote controller under stopping or at the display of HO, continuously press the FILTER + switch (A + B) at the same time for seconds to change to the registration mode. In order to confirm the indoor unit address already registered, press switch (E). (See figure below.) When the group of plural sets is registered, the addresses will be displayed in order at each pressing of switch (E). After completing the registration, continuously press the FILTER + switch (A + B) at the same time for seconds to change to the original ordinary mode (with the remote controller under stopping). Registered C ERROR CODE OA UNIT ADDRESS NO Indicates the type of unit (Indoor unit in this case) TEMP ON/OFF CLOCK ON OFF FILTER CHECK TEST No registration. PAR-FMEA TIMER SET Press the switch for confirmation (E) C ERROR CODE OA UNIT ADDRESS NO Note: Only one address will be displayed when the registration is one even the switch is how often pressed Retrieval/confirmation of registration information... The registered information on a certain unit (indoor unit, outdoor unit, remote controller or the like) is displayed. [Operation procedure] With the remote controller under stopping or at the display of HO, continuously press the FILTER + switch (A + B) at the same time for seconds to change to the registration mode. Operate switch (G) for the interlocked setting mode. (See figure below.) Assign the unit address of which registration information is desired to confirm with the (TIMER SET) switch (H). Then press the switch (E) to display it on the remote controller. (See figure below.) Each pressing of switch (E) changes the display of registered content. (See figure below.) After completing the retrieval/confirmation, continuously press the FILTER + switch (A + B) at the same time for seconds to change to the original ordinary mode (with the remote controller under stopping).

57 Registered C (Alternative display) C TEMP ON/OFF CLOCK ON OFF FILTER PAR-FMEA TIMER SET CHECK TEST + C (Alternative display) Press the switch for confirmation (E) Set the address C C INDOOR UNIT ADDRESS NO ERROR CODE OA UNIT ADDRESS NO * Same display will appear when the unit of 00 is not existing. No registration ) Method of deletion Deletion of group registration information of indoor unit... C ERROR CODE OA UNIT ADDRESS NO [Operation procedure] With the remote controller under stopping or at the display of HO, continuously press the FILTER + switch (A + B) at the same time for seconds to change to the registration mode. Press the switch (E) to display the indoor unit address registered. (As same as ) In order to delete the registered indoor unit being displayed on the remote controller, press the CLOCK ON OFF (F) switch two times continuously. At completion of the deletion, the attribute display section will be shown as. (See figure below.) Note: Completing the deletion of all indoor units registered on the remote controller returns to HO display. After completing the registration, continuously press the FILTER + switch (A + B) at the same time for seconds to change to the original ordinary mode (with the remote controller under stopping). Deletion completed In case group registration with other indoor unit is existing C INDOOR UNIT ADDRESS NO ERROR CODE OA UNIT ADDRESS NO indicates the deletion completed. TEMP ON/OFF CLOCK ON OFF FILTER Deletion completed CHECK TEST PAR-FMEA TIMER SET In case no group registration with other indoor unit is existing C INDOOR UNIT ADDRESS NO ERROR CODE OA UNIT ADDRESS NO Press the switch for confirmation (F) twice continuously. 6

58 ) Deletion of information on address not existing Deletion of information on address not existing... This operation is to be conducted when 660 error (No ACK error) is displayed on the remote controller caused by the miss setting at test run, or due to the old memory remained at the alteration/modification of group composition, and the address not existing will be deleted. Note: The connection information (connection between indoor unit and outdoor unit) on the refrigerant system can not be deleted. An example to delete the system controller of 0 from the indoor unit of 00 is shown below. [Operation procedure] With the remote controller under stopping or at the display of HO, continuously press the FILTER + switch (A + B) at the same time for seconds to change to the registration mode. Operate switch (G) for the interlocked setting mode ( ii ). (See the figure below.) Assign the unit address existing to OA UNIT ADDRESS No. with the (TIMER SET) switch (H), and press switch (E) to call the address to be deleted. (See the figure below.) As the error display on the remote controller is usually transmitted from the indoor unit, OA UNIT ADDRESS No. is used as the address of the indoor unit. Press the CLOCK ON OFF switch (F) twice. (See the figure below.) After completing the deletion, continuously press the FILTER + switch (A + B) at the same time for seconds to return to the original ordinary mode (with the remote controller under stopping). C INDOOR UNIT ADDRESS NO ERROR CODE OA UNIT ADDRESS NO (Alternative display) When both indoor unit and interlocked unit addresses are existing Deletion completed C INDOOR UNIT ADDRESS NO ERROR CODE OA UNIT ADDRESS NO (Alternative display) C INDOOR UNIT ADDRESS NO ERROR CODE OA UNIT ADDRESS NO C INDOOR UNIT ADDRESS NO ERROR CODE OA UNIT ADDRESS NO * + Deletion completed Deletion of address not existing C INDOOR UNIT ADDRESS NO ERROR CODE OA UNIT ADDRESS NO (Alternative display) TEMP CLOCK ON OFF ON/OFF FILTER C INDOOR UNIT ADDRESS NO ERROR CODE OA UNIT ADDRESS NO * CHECK TEST PAR-FMEA TIMER SET Press the switch for confirmation (E) Set the address (H) Press the deletion switch (F) twice

59 CONTROL [] Control of Outdoor () Initial processing When turning on power source, initial processing of microcomputer is given top priority. During initial processing, control processing corresponding to operation signal is suspended. The control processing is resumed after initial processing is completed. (Initial processing : Data processing in microcomputer and initial setting of each LEV opening, requiring approx. minutes at the maximum.) () Control at staring In case unit is started within hours after turning on power source at low ambient temperature (+ C or less), the unit does not start operating for 0 minutes at the maximum. () Bypass, capacity control Solenoid valve consists of bypass solenoid valve (SV, SV) bypassing between high pressure side and low pressure sider. The following operation will be provided. ) Bypass solenoid valves SV and SV (both open when turned on) SV Item ON (Open) OFF (Close) ON (Open) SV PU(H)Y-00 0YMF-C : Y PU(H)Y-P00 0YMF-C : Y-P PURY-00 0YMF-C : R PURY-P00 0YMF-C : R-P Object OFF (Close) Y Y-P R R-P When starting compressor Turned on for minutes Turned on for minutes After thermost ON is returned and after minutes restart Turned on for minutes Turned on for minutes When compressor stops in cooling or heating mode Always turned on After operation stops Turned on for minutes During defrosting operations Always turned on Always turned on. During oil recovery operations Always turned on. Always turned on. Always turned on. During 0Hz operations, at fall in low pressure or low pressure saturation temperature. (minutes or more after starting) When Ps is.kg/ cm G (0.MPa) or less When low TH is 0 C or less When Ps is.kg/ cm G (0.MPa) or more When TH is C or more When high pressure rises (Pd) When Pd reaches.kg/cm G (.0MPa) or more When Pd is kg/cm G (.MPa) or less 0 seconds When Pd reaches 6.kg/cm G (.60MPa) or more When Pd reaches.kg/cm G (.0MPa) or more When Pd is.kg/ cm G (.0MPa) or less after 0 seconds When Pd is kg/ cm G (.MPa) or less after 0 seconds When high pressure rises (Pd) during 0Hz operations ( minutes after starting) Turned on when high pressure (Pd) exceeds pressure limit When high pressure (Pd) is 0kg/cm G (.96MPa) or less When discharge temperature rises ( minutes after starting) When temp. exceeds 0 C and Pb reaches kg/cm G (.MPa) or more When discharge temp. is C or less Compressor Bypass solenoid valve (SV) Start Thermo. OFF Thermo. ON Defrosting time (*) (-minute) (-minute) (-minute) (-minute) 8 Stop

60 () Frequency control Depending on capacity required, capacity control change and frequency change are performed to keep constant evaporation temperature in cooling operations, and high pressure saturation temperature in heating operation. Frequency change is perfprmed at the rate of Hz/second across 0 ~ 0Hz range. ) Frequency control starting 60Hz is the upper limit for minutes after starting. Hz is the upper limit within 0 minutes at the first starting compressor after turning on power source. ) Pressure limit The upper limit of high pressure (Pd) is set for each frequency. When the limit is exceeded, frequency is reduced every 0 seconds. (Frequency decrease rate (Hz) : % of the present value) <(P)00YMF-C> <(P)0YMF-C> ) Discharge temperature limit Discharge temperature (Td) of compressor is detected during operation. If the upper limit is exceeded, the frequency is reduced. (Change rate : % of the present value) 0 seconds after starting compressor, control is performed every minute. Operation temperature is 0 C. ) Periodical frequency control Frequency controll is periodically performed except for the frequency controls at operation start, status change, and protection. Cycle of periodical frequency control Periodical frequency control is performed every minute after the time specified below has passed. 0 sec after starting compressor or finishing defrostoing operations 0 sec after frequency control by discharge temperature or pressure limit Amount of frequency change The amount of frequency change is controlled corresponding to evaporation temperature and high pressure saturation temperature. - Back up of frequency control by bypass valve (PU(H)Y-00 0YMF-C) During 0Hz operations, frequency is backed up by turning on (opening) bypass valve (SV). Cooling During 0Hz operations minutes after starting compressor, bypass valve is turned on when TH is -0 C or less, and turned off when TH is C or more. Heating During 0Hz operations minutes after starting compressor, SV turned on when high pressure (Pd) exceeds pressure limit and turned off when Pd falls to 0kg/cm G (.96MPa) or less. ON ON OFF 0 C C 9 OFF 0kg/cm G (.96MPa) kg/cm G (.6MPa)

61 - Back up of frequency control by bypass valve (PUHY-P00 0YMF-B, PURY-(P)00 0YMF-C) During 0Hz operations, frequency is backed up by turning on (opening) bypass valve (SV). Cooling During 0Hz operations minutes after starting compressor, bypass valve is turned on when, Ps is.kg/cm G (0.MPa) or less and turned off when Ps is.kg/cm G (0.MPa) or more. Heating During 0Hz operations minutes after starting compressor, SV turned on when high pressure (Pd) exceeds pressure limit and turned off when Pd falls to 0kg/cm G (.96MPa) or less. ON ON OFF.kg/cm G (0.MPa).kg/cm G (0.MPa) OFF 0kg/cm G (.96MPa) kg/cm G (.6MPa) () Oil return control (Electronic expansion valve <SLEV>) Oil return LEV (SLEV) opening is dependent on compressor frequency and ambient temperature. SLEV is closed (0) when compressor stops, and SLEV is set (6) for 0 minutes after starting compressor. (6) Subcool coil control (electronic expansion valve <LEV>) : PU(H)Y-00 0YMF-B, PUHY-P00 0YMF-C The amount of super heat detected from the bypass outlet temperature of subcool coil (TH8) is controlled to be within a certain range for each 60 sec. The opening angle is corrected and controlled depending on the outlet/inlet temperature of subcool coil (TH, TH) and the discharge temperature. However, the valve will be closed (0) at heating and compressor stopping. It will fully open at defrosting. () Defrost operation control PU(H)Y-(P)00 0YMF-C ) Starting of defrost operations After integrated 9 min : P-YMF-C, min : YMF-C of compressor operations, defrosting operations start when C or less : P-YMF-C, C or less : YMF-C of piping temperature (TH) is detected for consecutive minutes. Forcible defrosting operations start by turning on forcible defrost switch (SW-) if minutes have already elapsed after compressor start or completion of defrosting operations. ) Completion of defrosting operations Defrosting operations stop when 0 min : P-YMF-C, min : YMF-C have passed since start of defrosting operation, or piping temperature (TH) reaches 8 C or more. (Defrosting operations do not stop for minutes after starting, except when piping temperature exceeds 0 C.) ) Defrosting prohibition Defrosting operations do not start during oil recovery, and for 0 minutes after starting compressor. ) Trouble during defrosting operations When trouble is detected during defrosting operations, the defrosting operations stop, and defrosting prohibition time decided by integrated operation time of compressor is set to be 0 minutes. ) Change in number of operating indoor units during defrosting operations In case number of operating indoor units changes during defrosting operations, the defrosting operations continue, and control of unit number change is performed after the defrosting operations are finished. Even in case all indoor units stop or thermostat is turned off during defrosting operations, the defrosting operations do not stop until expected defrosting activities are completed. 60

62 PURY-(P)00 0YMF-C ) Starting of defrost operations After integrated minutes of compressor operations, defrosting operations start when 8 C : P-YMF-C, 6 C : YMF-C or less of piping temperature (TH) is detected for consecutive minutes. Forcible defrosting operations start by turning on forcible defrost switch (SW-) if minutes have already elapsed after compressor start or completion of defrosting operations. ) Completion of defrosting operations Defrosting operations stop when 0 minutes have passed since start of defrosting operation, or piping temperature (TH) reaches 8 C or more. (Defrosting operations do not stop for minutes after starting, except when piping temperature exceeds (TH and TH) 0 C and Pd >0kg/cm G (0.98MPa).) ) Defrosting prohibition Defrosting operations do not start during oil recovery, and for 0 minutes after starting compressor. ) Trouble during defrosting operations When trouble is detected during defrosting operations, the defrosting operations stop, and defrosting prohibition time decided by integrated operation time of compressor is set to be 0 minutes. ) Change in number of operating indoor units during defrosting operations In case number of operating indoor units changes during defrosting operations, the defrosting operations continue, and control of unit number change is performed after the defrosting operations are finished. Even in case all indoor units stop or thermostat is turned off during defrosting operations, the defrosting operations do not stop until expected defrosting activities are completed. (8) Control of liquid level detecting heater Detect refrigerant liquid level in accumulator, and heat refrigerant with liquid level heater for judging refrigerant amount. 6 steps of duty control is applied to liquid level heater depending on frequency and outdoor air temperature, minute after starting compressor. (9) Judgement of refrigerant amount Inlet Outlet AL= LD Float AL= LD Oil return AL=0 LD OFF LD ON AL= LD OFF AL=0 LD : Liquid level Detected Switch LD ON AL= 6

63 (0) Refrigerant recovery control (PU(H)Y-(P)00 0YMF-C) Refrigerant recovery is conducted to prevent refrigerant from accumulating in the stopped unit (fan unit), the unit under cooling mode and that with heating thermostat being turned off. ) Start of refrigerant recovery Refrigerant recovery is started when the two items below are fully satisfied. minutes has passed after finishing refrigerant recovery. The discharge temparature is high. ) Refrigerant recovery operation Refrigerant is recovered by opening LEV of the objective indoor units (indoor units under stop. fan, and cooling modes, and that with heating thermostat being turned off) for 0 seconds. LEV opening at refrigerant recovery (Indoor unit LEV opening 00 pulse) LEV opening before change Starts 0 seconds Finish The regular capacity control of the outdoor unit and the regular LEV control of the indoor unit are not applied during refrigerant recovery operation, but are fixed with the value before the recovery operation. These controls will be conducted one minute after finishing the recovery operation. Defrosting operation is prohibited during the recovery operation, and it will be conducted after finishing the recovery operation. () Control of outdoor unit fan and outdoor unit heat exchanger capacity PU(H)Y-00 0YMF-C ) Control system Depending on capacity required, control outdoor fan flow rate with phase control, for maintaining evaporation temperature (0 C when Pd kg/cm G (.MPa), lower than 0 C when Pd < kg/cm G (.MPa) in cooling operations, and high pressure 8kg/cm G (.6MPa) in heating operations. ) Control Outdoor unit fan stops when compressor stops. Fan is in full operation for seconds after starting. Outdoor unit fan stops during defrosting operations. PUHY-P00 0YMF-B, PURY-(P)00 0YMF-C ) Control system Depending on capacity required, control outdoor fan flow rate with phase control, for maintaining evaporation temperature (0 C) in cooling operations, and high pressure saturated temperature (9 C) in heating operations. ) Control Outdoor unit fan stops when compressor stops. Fan is in full operation for seconds after starting. Outdoor unit fan stops during defrosting operations. 6

64 [] Control of BC Controller () Control of SVA, SVB and SVC SVA, SVB and SVC are turned on and off depending on connection mode. Mode Connection Cooling Heating Stop Defrost SVA ON OFF OFF OFF SVB OFF ON OFF OFF SVC ON OFF OFF OFF () Control of SVM SVM is turned on and off corresponding to operation mode. Operation mode Cooling-only Cooling-main Heating-only Heating-main Stop SVM ON OFF OFF OFF OFF * SVM is not built in depending on models. () Control of LEV LEV opening (sj) is controlled corresponding to operation mode as follows: (Number of pulse) Operation mode Cooling-only Heating-only Cooling-main Heating-main Stop LEV LEV 000 Superheat control * 60 Differential Pressure control * Liquid level control * Differential pressure control * 60 Differential Pressure control * * Superheat control Control every minute so that superheat amount detected by bypass inlet and oulet temperatures (TH, TH) stay in the specified range. * Differential pressure control Control every minute so that detected differential pressure (PS, PS) stay in the specified range. * 60 or more pulses are sometimes detected because of rise in liquid side pressure (PS). * Please confirm that the above parts of BC controllers are being color-corded and shown with the name plate inside the BC controller unit. 6

65 [] Operation Flow Chart () Outdoor unit Start Breaker turned on YES NO Normal operations Trouble observed Stop HO blinks on the remote controller NO Note : Set indoor address No. to remote controller YES Oil return LEV, SC coil LEV (PUHY) fully closed NO Operation command YES. C OFF. Inverter output 0Hz. Outdoor fan Stop. All solenoid valve OFF Fan Operation mode Error mode NO Cooling-only, Heating-only, Cooling/heating mixed Note : YES Error stop C ON Operation mode Note : Cooling/heating mixed (only for PURY) Note : Operation mode Error code blinks on the outdoor controller board Error command to BC controller Error code blinks on the remote controller Cooling (Coolingonly) operations Heating (Heatingonly) operations Cooling-main operations Heating-main operations Operation mode command to (BC controller) outdoor unit Note : Note : Note : Note : For about minutes after turning on power source, address and group information of outdoor unit, BC, controller indoor unit, and remote controller are retrieved by remote controller, during which HO blinks on and off on remote controller. In case indoor unit is not grouped to remote controller, HO display on remote controller continues blinking even after minutes after turning on power source. Two trouble modes included indoor unit side trouble, (BC controller trouble) and outdoor unit side trouble. In the case of indoor unit side trouble, error stop is observed in outdoor unit only when all the indoor units are in trouble. However, if one or more indoor units are operating normally, outdoor unit shows only LED display without undergoing stop. On PUHY system, operation mode conforms to mode command by indoor unit. However, when outdoor unit is being under cooling operation, the operation of indoor unit will be prohibited even by setting a part of indoor units under operation, or indoor unit under stopping or fan mode to heating mode. Reversely when outdoor unit is being heating operation, the same condition will be commenced. On PURY system, operation mode conforms to mode command by BC controller. In case BC controller issues cooling/heating mixed operation mode, outdoor unit decides operation mode of cooling-main operation or heating-main operation. 6

66 () BC controller (for PURY) Start YES Breaker turned on NO Normal operations Trouble observed Stop NO Operation command YES. Operation mode judgement (cooling-only, heating-only, cooling/heating mixed). Transmission to outdoor unit Receiving operation mode command from outdoor unit Note : Error mode YES NO Error stop Fan Operation mode Cooling/heating mixed Error code blinks on the outdoor controller board Solenoid valve OFF, LEV fully closed. Operation mode Operation mode Error command to BC controller Error code blinks on the remote controller Cooling-only operations Heating-only operations Cooling-main operations Heating-main operations Note : Two error modes include indoor unit side trouble, BC controller trouble, and outdoor unit side trouble. In the case of indoor unit side trouble, error stop is observed in the concerned indoor unit only, and in the cases of BC controller and outdoor unit side troubles, error stop is observed in all the indoor units, BC controller, and outdoor unit. 6

67 () Indoor unit Start Breaker turned on YES NO Normal operations Trouble observed Stop Operation SW turned on NO YES. Protection function self-holding cancelled.. Indoor unit LEV fully closed. Remove controller display extinguished Note : Note : NO Error mode YES Error stop Operation mode only for PURY FAN stop Error code blinks on the remote controller Cooling mode Heating mode Dry mode Cooling/heating automatic mode Fan mode Error command to outdoor unit Cooling display Heating display Dry display Note : Note : Cooling/heating automatic display Note : Fan display YES -minute drain pupm ON Drain pump ON NO Indoor unit LEV fully closed Note : YES Prohibition NO YES Prohibition NO YES Prohibition NO YES Prohibition NO Error code blinks on the outdoor controller board Cooling operations Heating operations Prohibition Remote controller blinking Dry operation Cooling/heating automatic operations Fan operations Note : Indoor unit LEV fully closed : Opening 60 Note : Note : Two error modes include indoor unit trouble, (BC controller trouble) and outdoor unit side trouble. In the case of indoor unit trouble, error stop is observed in the concerned indoor unit only, and in the cases of (BC controller and) outdoor unit side troubles, error stop is observed in all the indoor units connected. Prohibition status is observed (when several indoor units are connected to one connection, of BC controller and) when connection mode is different from indoor unit operation mode. (Operation mode display on the remote controller blinks on and off, fan stops, and indoor unit LEV is fully closed.) 66

68 () Cooling operation Cooling operation -way valve OFF Normal operations Test run Stop Indoor unit fan operations Test run start YES NO NO Thermostat ON YES YES -minute restart prevention NO. Inverter output 0Hz. Indoor unit LEV, oil return LEV, Subcool coil bypass LEV fully closed. Solenoid valve OFF. Outdoor unit fan stop. BC controller solenoid valve OFF (PURY) 6. BC controller LEV fully closed (PURY). Inverter frequency control. Indoor unit LEV, oil return LEV control. Solenoid valve control. Outdoor unit fan control. BC controller solenoid valve control (PURY) 6. BC controller LEV control (PURY) 6

69 () Heating operation Heating operation Note : Note : Normal operations Defrosting operations Stop Test run Defrosting operation YES NO -way valve ON -way valve OFF NO Test run start NO Thermostat ON YES YES. Indoor unit fan stop. Inverter defrost frequency control. Indoor unit LEV fully opened, oil return LEV fully closed. Solenoid valve control. Outdoor unit fan stop 6. BC controller solenoid valve control (PURY). BC controller LEV control (PURY) YES -minute restart prevention NO. Indoor unit fan very low speed operations. Inverter output 0Hz. Indoor unit LEV, oil return LEV fully closed. Solenoid valve OFF. Outdoor unit fan stop 6. BC controller solenoid valve OFF (PURY). BC controller LEV fully closed (PURY). Indoor and outdoor unit fan control. Inverter frequency control. Indoor unit LEV, oil return LEV control. Solenoid valve control. BC controller solenoid valve control (PURY) 6. BC controller LEV control (PURY) Note : Note : When outdoor unit starts defrosting, it transmits defrost operations command to (BC controller and) indoor unit, and the indoor unit starts defrosting operations. Similarly when defrosting operation stops, indoor unit returns to heating operation after receiving defrost end command of outdoor unit. PUHY-(P)00 0YMF-C Defrosting start condition : After integrated 9 minutes : P-YMF-C, minutes : YMF-C of compressor operations, and C : P-YMF-C, C : YMF-C or less outdoor unit coil temperature. Defrosting end condition : After 0 minutes : P-YMF-C, minutes : YMF-C of defrosting operation or the outdoor unit coil temperature having risen to 8 C or more. PURY-(P)00 0YMF-C Defrosting start condition : After integrated minutes of compressor operations, and 8 C:P-YMF-C, 6 C:YMF-C or less outdoor unit coil temperature. (TH) Defrosting end condition : After minutes of defrosting operation or the outdoor unit coil temperature (TH and TH) having risen to 8 C or more. 68

70 (6) Dry operation Dry operations -way valve OFF Normal operations Thermostat ON Stop Test run start NO YES Note : Thermostat ON NO Inlet temp. YES 8 C. Indoor unit fan stop. Inverter output 0Hz. Indoor unit LEV, oil return LEV closed. Solenoid valve OFF. Outdoor unit fan stop 6. BC controller solenoid valve OFF (PURY). BC controller LEV fully closed (PURY) Note :. Outdoor unit (Compressor) intermittent operations. Indoor unit fan intermittent operations YES (Synchronized with compressor : low speed, OFF operations) Note : Note : When indoor unit inlet temperature exceeds 8 C, outdoor unit (compressor) and indoor unit fan start intermittent operations synchronously. Operations of outdoor unit, BC controller (PURY), indoor unit LEV and solenoid valve accompanying compressor are the same as those in cooling operations. Thermostat is always kept on in test run, and indoor and outdoor unit intermittent operation (ON) time is a little longer than normal operations. 69

71 [] List of Major Component Functions Symbol Name (function) Application Specification Check method Object TH6 (outdoor air temperature) Compressor MC Adjust refrigerant circulation by controlling operating frequency and capacity control valve with operating pressure. Low pressure shell scroll type with capacity control mechanism Winding resistance: Each phase 0.88Ω (0 C) PU(H)Y- (P)00 0YMF-C PURY- (P)00 0YMF-C High pressure sensor 6HS ) High press. detection. ) Frequency control and high pressure protection Connector 6HS Pressure 0~0 kg/cm G (0~.9MPa) Vout 0.~. V Gnd (black) Vout (white) Vc (DCV) (red) Low pressure sensor 6LS ) Detects low pressure ) Calculates the refrigerant circulation configuration. ) Protects the low pressure Connector 6LS Pressure 0~0 kg/cm G (0~0.98MPa) Vout 0.~. V Gnd (black) Vout (white) Vc (DCV) (red) PU(H)Y- P00 0YMF-C PURY- (P)00 0YMF-C Pressure switch Thermistor 6H TH (discharge) ) High pressure detection ) High pressure protection ) Discharge temperature detection ) High pressure protection Setting 0kg/cm G (.9MPa) OFF R0=.6kΩ B/0=0 Continuity check Resistance value check PU(H)Y- (P)00 0YMF-C PURY- (P)00 0YMF-C 0 C : 0kΩ 0 C : kω 0 C : 60kΩ 80 C : kω 0 C : 0kΩ 90 C :.kω 0 C : 0kΩ 00 C :.0kΩ 60 C : 8kΩ 0 C : 9.8kΩ Rt =.6exp {0( - )} +t +0 Outdoor unit TH (low pressure saturation temperature) ) Detects the saturated vapor temperature. ) Calculates the refrigerant circulation configuration. ) Controls the compressor frequency. ) Controls the outdoor unit s fan air volume. R0=kΩ B0/00=96 Rt = exp{96( - )} +t +0-0 C : 9kΩ -0 C : kω 0 C : kω 0 C : 0kΩ 0 C : kω 0 C : 8.kΩ Resistance value check PU(H)Y- (P)00 0YMF-C PURY- P00 0YMF-C TH (piping temperature) TH (subcool coil outlet temperature) ) Frequency control ) Defrost control and liquid level detection at heating ) Outdoor air temperature detection ) Fan control, liquid level heater, and opening setting for oil return Subcool coil bypass LEV (LEV) control R0=kΩ B0/00=60 Rt = exp{60( - )} +t +0 0 C : kω 0 C : 9.kΩ 0 C : 6.kΩ C :.kω 0 C :.kω 0 C :.kω PU(H)Y- (P)00 0YMF-C PURY- (P)00 0YMF-C TH8 (subcool coil bypass outlet temperature) Subcool coil bypass LEV (LEV) control PU(H)Y- (P)00 0YMF-C TH9 ) Detects the CS circuit fluid temperature. ) Calculates the refrigerant circulation configuration. PU(H)Y- P00 0YMF-C PURY- P00 0YMF-C 0

72 Name Symbol (function) Application Specification Check method Object Thermistor TH0 R0=.6kΩ (P-YMF-C B/0=0 only) Rt = ) Detects the compressor shell temperature. ) Provides compressor shell overheating protection..6exp {0( - )} +t +0 0 C : 0kΩ 0 C : kω 0 C : 60kΩ 80 C : kω 0 C : 0kΩ 90 C :.kω 0 C : 0kΩ 00 C :.0kΩ 60 C : 8kΩ 0 C : 9.8kΩ PU(H)Y- P00 0 YMF-C PURY- P00 0 YMF-C Outdoor unit Solenoid valve Linear expansion valve THHS SV (discharge - suction bypass) SV (discharge - suction bypass) SV ~ SV ~ 6 SLEV ) Detects the inverter cooling fin temperature. ) Provides inverter overheating protection. ) Controls the control box cooling fan. ) High/low press. bypass at starting/ stopping and capacity control at low load ) Discharge press. rise suppression Capacity control and high press. rise suppression (backup for frequency control) Control of heat exchanger capacity. Control of heat exchanger capacity. Adjustment of liquid refrigerant (oil) return foam accumulator R0=kΩ B/0=0 Rt = exp{0( - )} +t +0-0 C : 60.0kΩ 0 C :.0kΩ -0 C :.kω 60 C :.kω 0 C : 80.9kΩ 0 C : 8.0kΩ 0 C : 0.kΩ 80 C :.kω 0 C : 6.8kΩ 90 C :.kω 0 C : 9.9kΩ 00 C :.0kΩ 0 C :.kω AC 0~0V Open at energizing and close at deenergizing DCV stepping motor drive Valve opening 0~80 pulse Continuity check by tester of inlet and outlet. PU(H)Y- (P)00 0 YMF-C PURY- (P)00 0 YMF-C PU(H)Y- P00 0YMF-C PURY- (P)00 0YMF-C PU(H)Y- (P)00 0YMF-C PURY- (P)00 0YMF-C Liquid level detection switch Linear expansion valve LEV (SC coil) LD LD LEV Adjustment bypass flow rate from outdoor unit liquid line at cooling. Detection of refrigerant liquid level in accumulator ) Adjust superheat of outdoor unit heat exchanger outlet at cooling. ) Adjust subcool of indoor unit heat exchanger at heating. LD.kΩ CN0 LD.kΩ DCV Opening of stepping motor driving valve 60~,000 pulses Resistance value check Continuity check with tester for white-red-orange yellow-brown-blue PU(H)Y- (P)00 0YMF-C PU(H)Y- (P)00 0YMF-C PURY- (P)00 0YMF-C Indoor unit Thermistor TH (inlet air temperature) TH (piping temperature) TH (gas side piping temperature) Indoor unit control (thermostat) ) Indoor unit control (freeze prevention, hot adjust, etc.) ) LEV control in heating operation (Subcool detection) LEV control in cooling operation (Superheat detector) R0 = kω B0/00 = 60 Rt = exp {60 ( - )} +t +0 0 C : kω 0 C : 9.kΩ 0 C : 6.kΩ C :.kω 0 C :.kω 0 C :.kω Resistance value check

73 Symbol Name Application Specification Check method Object (function) Pressure sensor PS PS ) Liquid pressure (high-pressure) detection ) LEV control ) Intermediate pressure detection ) LEV control Connector PS PS Pressure 0~0 kg/cm G (0~.9MPa) Vout 0.~. V Gnd (black) Vout (white) Vc (DCV) (red) BC controller Thermistor TH (liquid inlet temperature) TH (bypass outlet pressure) TH (bypass outlet temperature) TH6 (bypass inlet temperature) LEV control (liquid refrigerant control) R0=kΩ B0/00=60 Rt = exp{60( - )} +t +0 LEV control (superheat control) 0 C : kω 0 C : 9.kΩ 0 C : 6.kΩ LEV control (superheat control) C :.kω 0 C :.kω 0 C :.kω LEV control (subcool control) Solenoid valve SVM * SVA Opens for cooling-only, defrosting. Supplies refrigerant to cooling indoor unit. AC 0~0V Open when energized Closed when de-energized Continuity check by a tester SVB Supplies refrigerant to heating indoor unit. SVC Supplies refrigerant to cooling indoor unit. Electronic expansion valve LEV LEV Liquid level control pressure control Liquid level control pressure control V DC stepping motor drive 0 to 000 valve opening pulse Same as LEV of indoor unit. *. SVM is not built in depending on models.

74 [] Resistance of Sensor Thermistor for low temperature Thermistor Ro= kω ± % (TH ~ 9) Thermistor R0 =.6kΩ ± % (TH, 0) Rt = exp {60 ( - )} Rt =.6exp {0 ( - )} +t +0 +t Resistance (kω) 0 0 Resistance (kω) ( C) ( C) Thermistor Ro = kω ± % (TH) Thermistor R0 = kω ± % (THHS) Rt = exp {96 ( - )} Rt = exp {0 ( - )} +t +0 +t +0 Resistance (kω) Resistance (kω) ( C) ( C)

75 6 REFRIGERANT AMOUNT ADJUSTMENT Clarify relationship between the refrigerant amount and operating characteristics of CITY MULTI, and perform service activities such as decision and adjustment of refrigerant amount on the market. [] Refrigerant Amount and Operating Characteristics The followings are refrigerant amount and operating characteristics which draw special attention. During cooling operations, required refrigerant amount tends to increase (refrigerant in accumulator decreases) in proportion to increase in the number of operating indoor units. However, the change of increase rate is small. During heating operations, liquid level of accumulator is the highest when all the indoor units are operating. Discharge temperature hardly changes when increasing or decreasing refrigerant amount with accumulator filled with refrigerant. Tendency of discharge temperature During cooling operations, discharge temperature tends to rise at overload than low temperature. During heating operations, discharge temperature tends to rise at low temperature than overload. The lower operating frequency is, the higher discharge temperature tends to become of deteriorated compressor efficiency. Comparison including control system Compressor shell temperature is 0~0 degrees higher than low pressure saturation temperature (Te) when refrigerant amount is appropriate. Judged as over replenishment when temperature difference from low pressure saturation temperature (Te) is 0 degrees or less. [] Adjustment and Judgement of Refrigerant Amount () Symptom The symptoms shown in the table below are the signs of excess or lack of refrigerant amount. Be sure to adjust refrigerant amount in refrigerant amount adjustment mode, by checking operation status, judging refrigerant amount, and performing selfdiagnosis with LED, for overall judgement of excess or lack of refrigerant amount. Emergency stop at 00 remote controller display (excessive refrigerant replenishment) Operating frequency does not fully increase, thus resulting in insufficient capacity Emergency stop at 0 remote controller display (discharge temperature trouble) Emergency stop occurs when the remote control display is at 0. (insufficient refrigerant) Excessive refrigerant replenishment Insufficient refrigerant replenishment Insufficient refrigerant

76 () Refrigerant Volume Adjustment Operation (PU(H)Y-(P)00 0YMF-C) for PU(H)Y-(P)00 0YMF-C ) Operating Characteristics Refrigerant Volume Characteristic items related to operating characteristics and the refrigerant volume are shown below. If the number of indoor units in operation increases during cooling, the required volume of refrigerant tends to increase (the amount of refrigerant in the accumulator tends to decrease), but the change is minimal. The liquid level in the accumulator is at its highest when all the indoor units are operating during heating. If there is refrigerant in the accumulator, even if the volume of refrigerant is increased or decreased, there is practically no change in the outlet temperature. Tendency of discharge During cooling, the discharge temperature rises more easily when there is an overload than when the temperature is low. During heating, the discharge temperature rises more easily when the temperature is low than when there is an overload. The lower the operating frequency, the less efficient the compressor is, making it easier for the discharge temperature to rise. Comparison when control is included. The compressor shell temperature becomes 0~0 deg. higher than the low pressure saturation temperature (TH) if the refrigerant volume is appropriate. If the difference with the low pressure saturation temperature (TH) is 0 deg. or less, it can be judged that the refrigerant is overcharged. ) Adjusting and Judging the Refrigerant Volume Symptoms Overcharging with refrigerant can be considered as the cause of the following symptoms. When adjusting the refrigerant volume, be sure that the unit is in the operating condition, and carry out refrigerant volume judgment and self-diagnosis by the LED s, judging overall whether the volume of refrigerant is in excess or is insufficient. Perform adjustments by running the unit in the refrigerant volume adjustment mode. Emergency stop occurs when the remote control display is at 00 (refrigerant overcharge). The operating frequency doesn t rise high enough and capacity is not achieved. Emergency stop occurs when the remote control display is at 0 (outlet temperature overheating). Emergency stop occurs when the remote control display is at 0 (insufficient refrigerant). Refrigerant overcharge Insufficient refrigerant Insufficient refrigerant Refrigerant Volume a Checking the Operating Condition Operate all the indoor units on cooling or on heating, checking the discharge temperature, sub-cooling, low pressure saturation temperature, inlet temperature, shell bottom temperature, liquid level, liquid step, etc. and rendering an overall judgment. Condition Outlet temperature is high. ( C or higher) Low pressure saturation temperature is extremely low. Inlet superheating is high (if normal, SH = 0 deg or lower). Shell bottom temperature is high (the difference with the low pressure saturation temperature is 0 deg. or greater) Shell temperature is low (the difference with the low pressure saturation temperature is 0 deg. or lower). 6 Dischange superheating is low (if normal, SH = 0 deg or higher). Judgement Refrigerant volume tends toward insufficient. Rifrigerant volume tends toward overcharge.

77 b for PU(H)Y-(P)00 0YMF-C Check the refrigerant volume by self-diagnosis using the LED. Set the self-diagnosis switch (SW) as shown below and check the past information (history) concerning the refrigerant volume. Set SW as shown in he figure at right ON If LD8 lights up, it indicates the refrigerant charge abnormal delay state just before emergency stop due to refrigerant overcharge (00). Additional Refrigerant Charge Volume At the time of shipping from the factory, the outdoor unit is charged with the amount of coolant shown in the following table, but since no extension piping is included, please carry out additional charging on-site. Outdoor Model Name PU(H)Y-00YMF-C PU(H)Y-P00YMF-C PU(H)Y-0YMF-C PU(H)Y-P0YMF-C Refrigerant Charge Volume 6.kg.0kg 8.0kg 8.kg Calculation Formula Calculate the additional refrigerant volume by calculating the size of the extension liquid piping and its length (units: m). Additional Refrigerant Volume (kg) = (0. L) + (0.06 L) + (0.0 L) + α L: Length of ø. liquid pipe (m) L: Length of ø9. liquid pipe (m) L: Length of ø6. liquid pipe (m) α: refer to the calculation table. In the calculation results, round up fractions smaller than 0.0 kg. (Example: 8. kg 8.6 kg) (α Calculation Table) Total Capacity of Connected Indoor s α ~90.0 kg 9 ~80. 8 ~0.0 Caution : (PUHY-P00 0YMF-C) When charging with refrigerant, be sure to charge from the liquid side. If charging from the gas side, it will cause the refrigerant composition to change inside the unit and the composition of the refrigerant remaining in the canister will also change. 6

78 for PU(H)Y-(P)00 0YMF-C ) Refrigerant Volume Adjustment Mode Operation Procedure Depending on the operating conditions, it may be necessary either to charge with supplementary refrigerant, or to drain out some, but if such a case arises, please follow the procedure given below flow chart. Notes Notes Notes Notes As the refrigerant volume can not be adjusted in the heating mode, retrieve the refrigerant, evacuate air and then fill the specified volume of refrigerant if it is necessary to adjust the refrigerant volume in the winter season. A refrigerant volume adjustment performed in the cooling mode must be done with a gauge reading of kg/cm G or higher. If the pressure does not reach refrigerant cannot be collected halfway. Therefore, collect used refrigerant and evacuate the unit completely, and then fill new refrigerant up to a specified quantity. Judgment by the AL is at best only a rough guideline. Please do not add refrigerant based on the AL reading alone. (Be sure to obtain calculations of the correct amount before adding refrigerant.) When supplementing the refrigerant volume, please be careful to charge with liquid refrigerant. TH Self-diagnosis Switch TH Self-diagnosis Switch Pd (High pressure) ON ON ON TH Self-diagnosis Switch ON Tc Self-diagnosis Switch ON Using these, judge TH, Tc - TH and Tc - TH.

79 for PU(H)Y-(P)00 0YMF-C In case of PUHY-00, 0YMF-C Adjustment starts. Start cooling operation of all indoor units in a test run mode. Note Has the compressor been operated for more than 0min? YES NO Note ) As the refrigerant volume can not be adjusted in the heating mode, retrieve the refrigerant, evacuate air and then fill the specified volume of refrigerant if it is necessary to adjust the refrigerant volume in the winter season. Was the operation condition stabilized? The high pressure > kg/cmg? TH C? *Operate for minutes after adjusting the refrigerant and make a judgement. Fill refrigerant little by little from the low-pressure side service port. Is the thermostat turned on/off in order for the indoor unit to prevent from frosting? Stop the refrigerant volume adjustment and retrieve the refrigerant. After evacuating air, fill the specified volume of refrigerant. TH8-TH deg? TH8-TH>deg? Are all indoor units SHs more than deg? Is the LEV opening degree stable when SH < deg? Fill refrigerant little by little from the low-pressure side service port. *Operate for minutes after adjusting the refrigerant and make a judgement. *Operate for minutes after adjusting the refrigerant and make a judgement. deg Tc-TH 0deg? Tc-TH < deg? Retrieve the refrigerant little by little from the low-pressure side service port. Fill refrigerant little by little from the low-pressure side service port. Tc-TH > deg? Fill refrigerant little by little from the low-pressure side service port. *Operate for minutes after adjusting the refrigerant and make a judgement. TH-Tc > deg? Retrieve the refrigerant little by little from the low-pressure side service port. *Operate for minutes after adjusting the refrigerant and make a judgement. TH 0 C? Fill refrigerant little by little from the low-pressure side service port. *Operate for minutes after adjusting the refrigerant and make a judgement. Adjustment completed. Caution : Do not let the drained out refrigerant escape to the outside atmosphere. Always be sure to charge with refrigerant from the liquid phase side. (PUHY-P00 0YMF-C) 8

80 for PU(H)Y-(P)00 0YMF-C In case of PUHY-P00, 0YMF-C Adjustment starts. Start cooling operation of all indoor units in a test run mode. Note Has the compressor been operated for more than 0min? YES NO Note ) As the refrigerant volume can not be adjusted in the heating mode, retrieve the refrigerant, evacuate air and then fill the specified volume of refrigerant if it is necessary to adjust the refrigerant volume in the winter season. Was the operation condition stabilized? The high pressure > kg/cmg? TH C? *Operate for minutes after adjusting the refrigerant and make a judgement. Fill refrigerant little by little from the low-pressure side service port. Is the thermostat turned on/off in order for the indoor unit to prevent from frosting? Stop the refrigerant volume adjustment and retrieve the refrigerant. After evacuating air, fill the specified volume of refrigerant. TH8-TH deg? TH8-TH>deg? Are all indoor units SHs more than 6deg? Is the LEV opening degree stable when SH < 6deg? Fill refrigerant little by little from the low-pressure side service port. *Operate for minutes after adjusting the refrigerant and make a judgement. *Operate for minutes after adjusting the refrigerant and make a judgement. deg Tc-TH 0deg? Tc-TH < deg? Retrieve the refrigerant little by little from the low-pressure side service port. Fill refrigerant little by little from the low-pressure side service port. Tc-TH > deg? Fill refrigerant little by little from the low-pressure side service port. *Operate for minutes after adjusting the refrigerant and make a judgement. TH-Tc > deg? Retrieve the refrigerant little by little from the low-pressure side service port. *Operate for minutes after adjusting the refrigerant and make a judgement. TH 0 C? Fill refrigerant little by little from the low-pressure side service port. *Operate for minutes after adjusting the refrigerant and make a judgement. Adjustment completed. Caution: (PUHY-P00 0YMF-C) Always be sure to charge with refrigerant from the liquid phase side. 9

81 for PU(H)Y-(P)00 0YMF-C () Refrigerant Amount Adjustment Mode Operations (PURY-(P)00 0YMF-C) Procedure Depending on the operating conditions, it may be necessary either to charge with supplementary refrigerant, or to drain out some, but if such a case arises, please follow the procedure given below flow chart. Notes Notes Notes Notes As the refrigerant volume can not be adjusted in the heating mode, retrieve the refrigerant, evacuate air and then fill the specified volume of refrigerant if it is necessary to adjust the refrigerant volume in the winter season. A refrigerant volume adjustment performed in the cooling mode must be done with a gauge reading of kg/cm G or higher. If the pressure does not reach refrigerant cannot be collected halfway. Therefore, collect used refrigerant and evacuate the unit completely, and then fill new refrigerant up to a specified quantity. Judgment by the AL is at best only a rough guideline. Please do not add refrigerant based on the AL reading alone. (Be sure to obtain calculations of the correct amount before adding refrigerant.) When supplementing the refrigerant volume, please be careful to charge with liquid refrigerant. TH SC ON ON SC6 Pd (High pressure) ON ON 80

82 for PURY-(P)00 0YMF-C In case of PURY-00, 0YMF-C Adjustment starts. YES NO Start cooling operation of all indoor units in a test run mode. Note Has the compressor been operated for more than 0min? Note ) As the refrigerant volume can not be adjusted in the heating mode, retrieve the refrigerant, evacuate air and then fill the specified volume of refrigerant if it is necessary to adjust the refrigerant volume in the winter season. Was the operation condition stabilized? The high pressure > kg/cmg? *Operate for minutes after adjusting the refrigerant and make a judgement. Is the thermostat turned on/off in order for the indoor unit to prevent from frosting? Stop the refrigerant volume adjustment and retrieve the refrigerant. After evacuating air, fill the specified volume of refrigerant. TH C? Fill refrigerant little by little from the low-pressure side service port. Are all indoor units SHs more than deg? Is the LEV opening degree stable when SH < deg? *Operate for minutes after adjusting the refrigerant and make a judgement. deg SC? Note Fill refrigerant little by little from the low-pressure side service port. *Operate for minutes after adjusting the refrigerant and make a judgement. 0 SC6 0deg? Note 0deg < SC6? Retrieve the refrigerant little by little from the low-pressure side service port. Fill refrigerant little by little from the low-pressure side service port. *Operate for minutes after adjusting the refrigerant and make a judgement. TH 0 C? Fill refrigerant little by little from the low-pressure side service port. Adjustment completed. 8 Note ) SC : Liquid refrigerant sub-cool for BC controller inlet Note ) SC6 : Liquid refrigerant sub-cool for BC controller outlet

83 for PURY-(P)00 0YMF-B In case of PURY-P00, 0YMF-C Adjustment starts. YES NO Start cooling operation of all indoor units in a test run mode. Note Has the compressor been operated for more than 0min? Note ) As the refrigerant volume can not be adjusted in the heating mode, retrieve the refrigerant, evacuate air and then fill the specified volume of refrigerant if it is necessary to adjust the refrigerant volume in the winter season. Was the operation condition stabilized? The high pressure > kg/cmg? *Operate for minutes after adjusting the refrigerant and make a judgement. Is the thermostat turned on/off in order for the indoor unit to prevent from frosting? Stop the refrigerant volume adjustment and retrieve the refrigerant. After evacuating air, fill the specified volume of refrigerant. TH C? Fill refrigerant little by little from the low-pressure side service port. Are all indoor units SHs more than 6deg? Is the LEV opening degree stable when SH < 6deg? *Operate for minutes after adjusting the refrigerant and make a judgement. deg SC? Note Fill refrigerant little by little from the low-pressure side service port. *Operate for minutes after adjusting the refrigerant and make a judgement. 0 SC6 0deg? Note 0deg < SC6? Retrieve the refrigerant little by little from the low-pressure side service port. Fill refrigerant little by little from the low-pressure side service port. *Operate for minutes after adjusting the refrigerant and make a judgement. TH 0 C? Fill refrigerant little by little from the low-pressure side service port. Adjustment completed. 8 Note ) SC : Liquid refrigerant sub-cool for BC controller inlet Note ) SC6 : Liquid refrigerant sub-cool for BC controller outlet

84 for PURY-(P)00 0YMF-C Time required for recovering refrigerant from low pressure service port (minute) Refrigerant amount to be drawn out (kg) Low pressure (kg/cm G) (MPa).~..~.. ~. (0.~0.) (0.~0.) (0.~0.) Additional evacuation, refrigerant replacement, and refrigerant replacement R series has unique refrigerant circuit structure which makes possible -pipe cooling-heating simultaneous operations. Therefore, in the case of total replacement or replenishment of refrigerant in this system, the following evacuation and refrigerant replenishment procedures are required. Perform evacuation by connecting to system analyzer joint of service port of high pressure ball valve and high pressure charge plug, and joint of service port of low pressure ball valve and low pressure charge plug. Perform refrigerant charge from low pressure circuit only, after finishing evacuation, closing vacuum pump valve, shutting off high pressure circuit of system analyzer, and opening valve of refrigerant cylinder. (In case service port of ball valve and charge plug can not be jointed as shown in the figure, use two vacuum pumps and evacuate high pressure side and low pressure side circuits separately.) Note : Though refrigerant gas itself is harmless, airtight room should be opened before gas release for preventing oxygen shortage. : When releasing gas, use blotting paper, etc. so that oil spouted with the gas does not spread out. D F E K LO J HI L M N A O S P T C R B G Q P-YMF-B H I R A B C D E F G H I J K L M Ball valve of the high pressure side Service port Ball valve of the low pressure side Charge plug High pressure Low pressure Evacuation Evacuation Replenish of refrigerant System analyzer Lo knob Hi knob -way joint N O P Q R S T 8 Valve Valve Flon cylinder R0C cylinder Scale Vacuum pump P-YMF-B : Use a vacuum pump with a reverse flow check valve A high-precision gravimeter measurable up to 0.kg should be used. If you are unable to prepare such a high-precision gravimeter, you may use a charge cylinder.

85 TROUBLESHOOTING [] Principal Parts Pressure Sensor () Judging Failure ) Check for failure by comparing the sensing pressure according to the high pressure/low pressure pressure sensor and the pressure gauge pressure. Turn on switches,,, 6 (High) and,,, 6 (Low) of the digital display select switch (SW) as shown below, and the sensor pressure of the high pressure/low pressure sensors is displayed digitally by the light emitting diode LD. High Pressure Low Pressure ON ON In the stopped condition, compare the pressure readings from the gauge and from the LD display. (a) If the gauge pressure is 0~ kg/cm G (0.098MPa), the internal pressure is dropping due to gas leakage. (b) If the pressure according to the LD display is 0~ kg/cm G (0.098MPa), there is faulty contact at the connector, or it is disconnected. Proceed to. (c) If the pressure according to the LD display is kg/cm G (.MPa) or higher, proceed to. (d) If other than (a), (b) or (c), compare the pressure readings during operation. Proceed to. Compare the pressure readings from the gauge and from the LD display while in the running condition. (a) If the difference between the two pressures is within kg/cm G (0.098MPa), both the affected pressure sensor and the main MAIN board are normal. (b) If the difference between the two pressures exceeds kg/cm G (0.098MPa), the affected pressure sensor is faulty (deteriorating performance). (c) If the pressure reading in the LD display does not change, the affected pressure sensor is faulty. Disconnect the pressure sensor from the MAIN board and check the pressure according to the LD display. (a) If the pressure is 0~ kg/cm G (0.098MPa) on the LD display, the affected pressure sensor is faulty. (b) If the pressure is kg/cm G (.MPa) (in the case of the low pressure sensor, 0 kg/cm G (0.98MPa)) or higher, the MAIN board is faulty. Disconnect the pressure sensor from the MAIN board and short out the No. and No. pins of the connector (6HS, 6LS), then check the pressure by the LD display. (a) If the pressure according to the LD display is kg/cm G (.MPa) (in the case of the low pressure sensor, 0 kg/cm G (0.98MPa)) or higher, the affected pressure sensor is faulty. (b) If other than (a), the MAIN board is faulty. ) Pressure sensor configuration. The pressure sensors are configured in the circuit shown in the figure at right. If DC V is applied between the red and black wires, a voltage corresponding to the voltage between the white and black wires is output and this voltage is picked up by the microcomputer. Output voltages are as shown below. High Pressure Low Pressure 0. V per kg/cm G (0.098MPa) 0. V per kg/cm G (0.098MPa) 6HS/ 6LS Vout 0.~. V Connector GND (Black) Vout (White) Vcc (DCV) (Red) 8

86 * Connector connection specifications on the pressure sensor body side. The connector s pin numbers on the pressure sensor body side differ from the pin numbers on the main circuit board side. Sensor Body Side MAIN Board Side Vcc Pin Pin Vout Pin Pin GND Pin Pin Solenoid Valve (SV, SV) (PU(H)Y-00, 0YMF-C) Check if the control board s output signals and the operation of the solenoid valves match. Setting the self-diagnosis switch (SW) as shown in the figure below causes the ON signal of each relay to be output to the LED s. Each LED shows whether the relays for the following parts are ON or OFF. When a LED lights up, it indicates that the relay is ON. SW LED 6 8 ON SV SV ) In the case of SV (Bypass Valve) (a) When the compressor starts, SV is ON for minutes, so check operation by whether the solenoid valve is emitting an operating noise. (b) Changes in the operating condition by solenoid valve operation can be confirmed by the temperature of the bypass circuit and the sound of the refrigerant. ) In the case of SV (Bypass) (a) SV goes ON in accordance with the rise in the high pressure in the cooling mode and heating mode, so check its operation by the LED display and the operating noise emitted by the solenoid valve. (b) Changes in the operating condition by solenoid valve operation can be confirmed by the temperature of the bypass circuit and the sound of the refrigerant. PU(H)Y-P00, 0YMF-C LED 6 8 ON SV SV SV SV ) In the case of SV (Bypass Valve) (a) When the compressor starts, SV is ON for minutes, so check operation by whether the solenoid valve is emitting an operating noise. (b) Changes in the operating condition by solenoid valve operation can be confirmed by the temperature of the bypass circuit and the sound of the refrigerant. ) In the case of SV (Bypass) (a) SV goes ON in accordance with the rise in the high pressure in the cooling mode and heating mode, so check its operation by the LED display and the operating noise emitted by the solenoid valve. (b) Changes in the operating condition by solenoid valve operation can be confirmed by the temperature of the bypass circuit and the sound of the refrigerant. ) SV, (Control of heat exchanger capacity) (a) Operations can be confirmed by LED display and operating sound of solenoid valve, because one or more of SV, are turned on depending on conditions during cooling-only operations. 8

87 Solenoid Valve (SV~6) (PURY-(P)00 0YMF-C) Check if the control board s output signals and the operation of the solenoid valves match. Setting the self-diagnosis switch (SW) as shown in the figure below causes the ON signal of each relay to be output to the LED s. Each LED shows whether the relays for the following parts are ON or OFF. When a LED lights up, it indicates that the relay is ON. SW LED ON SV SV SV SV ON SV SV6 ) In the case of SV (Bypass Valve) (a) When the compressor starts, SV is ON for minutes, so check operation by whether the solenoid valve is emitting an operating noise. (b) Changes in the operating condition by solenoid valve operation can be confirmed by the temperature of the bypass circuit and the sound of the refrigerant. ) In the case of SV (Bypass) (a) SV goes ON in accordance with the rise in the high pressure in the cooling mode and heating mode, so check its operation by the LED display and the operating noise emitted by the solenoid valve. (Conditions during operation: See Control of Outdoor.) (b) Changes in the operating condition by solenoid valve operation can be confirmed by the temperature of the bypass circuit and the sound of the refrigerant. ) SV ~ 6 (Control of heat exchanger capacity) (a) Operations can be confirmed by LED display and operating sound of solenoid valve, because one or more of SV ~ are turned on depending on conditions during cooling-only operations. (b) Operation can be confirmed by LED display and operating sound of solenoid valve, because all of SV ~ are turned on during heating-only operations. (c) Operations can be confirmed by LED display and operating sound of solenoid valve, because one or more of SV ~6 are turned on depending on conditions during cooling-principal and heating-principal operations. 86

88 (d) The refrigerant flow is as following figure. Hot gas (high pressured) flows in cooling mode and cool gas/liquid (low pressured) flows in heating mode. Please refer to the Refrigerant Circuit Diagram. And, ON/OFF of Solenoid valve is depends on the amount of running indoor units, ambient temperature and so on. So please check by LED Monitor Display. The SV coil is taken off, then it is possible to open caps and check plungers. But the special tool which is on the Service Parts List is needed. * Closed torque : kg m (.N m) 8

89 Outdoor LEV The valve opening angle changes in proportion to the number of pulses. (Connections between the outdoor unit s MAIN board and SLEV, LEV (PU(H)Y-(P)00 0YMF-C)) Pulse Signal Output and Valve Operation Output states Output (phase) 6 8 ø ON OFF OFF OFF OFF OFF ON ON ø ON ON ON OFF OFF OFF OFF OFF ø OFF OFF ON ON ON OFF OFF OFF ø OFF OFF OFF OFF ON ON ON OFF Output pulses change in the following orders when the Valve is Closed 6 8 Valve is Open *. When the LEV opening angle does not change, all the output phases are off.. When the output is out of phase or remains ON continuously, the motor cannot run smoothly, but move jerkily and vibrates. LEV Valve Closing and Valve Opening Operations * When the power is switched ON, a 0 pulse valve opening signal is output to make sure the valve s position, so that it is definitely at point A. (The pulse signal is output for approximately seconds.) Valve Opening Angle (Flow Rate) Valve Closing Valve Opening Fully Open 80 pulses * When the valve operates smoothly, there is no sound from the LEV and no vibration occurs, but when the valve is locked, it emits a noise. * Whether a sound is being emitted or not can be determined by holding a screwdriver, etc. against it, then placing your ear against the handle. * If there is liquid refrigerant inside the LEV, the sound may become lower. Pulse Count 88

90 Judgment methods and likely failure mode Caution: The specifications of the outdoor unit (outdoor LEV) and indoor unit (indoor LEV) differ. For this reason, there are cases where the treatment contents differ, so follow the treatment specified for the appropriate LEV as indicated in the right column. Failure Mode Judgment Method Treatment Affected LEV Microcomputer driver circuit failure Disconnect the control board connector and connect the check LED as shown in the figure below. Indoor, BC controller Outdoor In the case of driver circuit failure, replace the control board. Indoor BC controller Outdoor When the base power supply is turned on, the indoor LEV outputs pulse signals for 0 seconds, the outdoor LEV outputs pulse signals for seconds, and BC controller outputs pulse signals for 0-0 seconds. If the LED does not light up, or lights up and remains on, the driver circuit is abnormal. LEV mechanism is locked. If the LEV is locked up, the drive motor turns with no load and a small clicking sound is generated. Generation of this sound when the LEV is fully closed or fully open is abnormal. Replace the LEV. Indoor BC controller Outdoor The LEV motor coils have a disconnected wire or is shorted. Measure the resistance between the coils (red - white, red - orange, brown - yellow, brown - blue) using a tester. They are normal if the resistance is within 0Ω ± 0%. Measure the resistance between the coils (gray - orange, gray - red, gray - yellow, gray - black) using a tester. They are normal if the resistance is within 6Ω ± %. Replace the LEV coils. Replace the LEV coils. Indoor BC controller Outdoor Fully closed failure (valve leaks) If you are checking the indoor unit s LEV, operate the indoor unit s blower and the other indoor units in the cooling mode, then check the piping temperatures (liquid pipe temperatures) of the indoor units by the operation monitor through the heat source unit s control board. When the fan is running, the linear expansion valve is fully closed, so if there is leakage, Thermistor liquid pipe (temperature sensor) Linear Expansion Valve the temperature sensed by the thermistor (liquid pipe temperature sensor) will become low. If the temperature is considerably low compared to the remote control s intake temperature display, it can be judged that there is a fully closed failure. In the case of minimal leakage, it is not necessary to replace the LEV if there are no other effects. If there is a large amount of leakage, replace the LEV. Indoor BC controller Faulty wire connections in the connector or faulty contact. Check for pins not fully inserted on the connector and check the colors of the lead wires visually. Disconnect the control board s connector and conduct a continuity check using a tester. Check the continuity at the places where trouble is found. Indoor BC controller Outdoor 89

91 Outdoor LEV (SLEV) Coil Removal Procedure (configuration) As shown in the figure, the outdoor LEV is made in such a way that the coils and the body can be separated. Coils Stopper Body Lead Wires Indentation for Stopper ( places around the circumference) <Removing the Coils> Fasten the body tightly at the bottom (Part A in the figure) so that the body will not move, then pull out the coils toward the top. If they catch on the stopper and are difficult to take out, turn the coils left and right until the stoppers are free from the stopper indentations, then pull the coils out. If you take out the coils only without gripping the body, undue force will be applied to the piping and the pipe may be bent over, so be sure to fasten the body in such a way that it will not move. Part A <Installing the Coils> Fasten the body tightly at the bottom (Part A in the figure) so that the body will not move, then insert the coils from the top, inserting the coils stopper securely in one of the indentations on the body. (There are four indentations for the stopper on the body around its circumference, and it doesn t matter which indentation is used. However, be careful not to apply undue force to the lead wires or twist them around inside the body.) If the coils are inserted without gripping the body, it may exert undue force on the piping, causing it to become bent, so be sure to hold the body firmly so that it won t move when installing the coils. Part A 90

92 Check Valves Block (PURY-(P)00 0YMF-C) The refrigerant flow in the pipe 6,, 8 and 9 are depend on ON/OFF of the SV,, and 6. Please confirm by LED monitor display. You can open the cap of valve A, B and C, but types of hexagon socket screw keys. The size is as follows. * Closed torque : A :.kg m (0.N m) B : 0kg m (.0N m) C : kg m (.N m) 9

93 Intelligent Power Module (IPM) Measure resistances between each terminal of IPM with tester, and use the results for troubleshooting. Specified resistance value is dependent on tester type to be used for resistance measurement, because diode inside IPM has non-linearity, thus difference of impedance and voltage in tester being influential. As the internal impedance of resistance range of analog tester equals to the center value of meter indication, the affect of internal impedance can be minimized if the tester having close center value of resistance range. Because internal voltage is normally.v, the tester to be used for troubleshooting of IPM should satisfy the following conditions. Internal voltage Central value of resistance range.v (Power source : one dry cell battery) 0 ~ 0Ω The measured values for troubleshooting are shown in the table below. (Use the minimum range for tester resistance range.) External view Internal circuit diagram P 0 6 Pre-Driver B 6 U P 9 Pre-Driver V N W V U 8 Pre-Driver W Pre-Driver Judged value 0 Pre-Driver Tester + Tester P U V W N P U V W N ~ 00Ω ~ 00Ω ~ 00Ω ~ 00Ω ~ 00Ω ~ 00Ω ~ 00Ω 6 Pre-Driver Over heating protection circuit B N Diode stack Perform continuity check with tester. Judged as normal if the following characteristics are observed. (Use the minimum range for tester resistance range.) + Tester + Tester - 0~0Ω 0~0Ω 0~0Ω Tester - Tester + 0~0Ω 0~0Ω 0~0Ω 9

94 () Trouble and remedy of remote controller Symptom Cause Checking method & countermeasure Despite pressing of remote controller switch, operation does not start with no electronic sound. (No powering signal appears.) At about 0 seconds after turning remote controller operation switch ON, the display distinguishes and the operation stops. ) M-NET transmission power source is not supplied from outdoor unit. Main power source of outdoor unit is not connected. Slipping off of connector on outdoor unit circuit board. Main board : CNS, CNVCC INV board : CNAC, CNVCC, CNL Faulty power source circuit of outdoor unit. Faulty INV board, Blown fuse (F on INV board) Broken diode stack Broken resistor (R) for rush current protection ) Short circuit of transmission line. ) Erroneous wiring of M-NET transmission line at outdoor unit. Transmission line disconnection or slipping off from terminal block. Erroneous connection of indoor/outdoor transmission line to TB. ) Slipping off of transmission wiring at remote controller. ) Faulty remote controller. ) Power source is not fed to indoor unit from transformer. Main power source of indoor unit is not turned on. Slipping off of connector (CND, CNT, CNT) on indoor controller board. Blown fuse on indoor controller board. Faulty or disconnected transformer of indoor unit. Faulty indoor controller board. a) Check transmission terminal block of remote controller for voltage. i) In case of ~ 0V Faulty network remote controller ii) In case of less than V See Transmission Power Circuit (0V) Check Procedure. The cause of ) and ) is displayed with self-diagnosis LED for 0 error. ) Faulty outdoor control circuit board or being out of control. As normal transmission is failed between indoor and outdoor units, outdoor unit model can not be recognized. Checking method & countermeasure Check indoor LED Lighting Lighting? Extinguishing or unable to confirm Check indoor unit power source terminal block voltage AC 0~0V? YES Check fuse on circuit board NO Check main power source of power source wiring. Apply power source again. Blown? NO YES Check 0V~0V circuit for short circuit and ground fault. Check connector slipping off (CND, CNT, CNT) Check for the change of LED display by operating dip switch SW for self-diagnosis. Slipped off? NO Check transformer resistance value Within rated? YES Check self-diagnosis function of outdoor unit Changed? YES * NO NO Improper connector connection Check cause of transformer disconnection. Ground fault on circuit board Ground fault on sensor, LEV Check self-diagnosis function after powering outdoor unit again. Changed? NO YES Faulty indoor controller board Casual trouble YES Faulty outdoor unit control circuit board Repair faulty point. * Check the transformer in accordance with the TROUBLE SHOOTING in the indoor unit s service handbook. 9

95 Symptom HO display on remote controller does not disappear and switch is ineffective. Cause (Without using MELANS) ) Outdoor unit address is set to 000. ) Erroneous address. Address setting miss of indoor unit to be coupled with remote controller. (Indoor unit = remote controller - 00.) Address setting miss of remote controller. (Remote controller = indoor unit + 00.) ) Faulty wiring of transmission terminal block TB of indoor unit in the same group with remote controller. ) Centralized control SW- of outdoor unit is turned ON. ) Setting to interlocking system from indoor unit (Switch - = OFF), while Fresh Master is intended to use by remote controller operation (indoor unit attribute). 6) Disconnection or faulty wiring of indoor unit transmission line. ) Disconnection between indoor unit M-NET transmission line terminal block (TB) and connector CNM. 8) More than sets of power supply connector (CN0) are inserted into centralized control transmission line of outdoor unit. 9) Faulty outdoor unit control circuit board. 0)Faulty indoor controller board. )Faulty remote controller. Checking method & countermeasure (Interlocking control with MELANS) )No grouping registration from MELANS (Neglecting to set the relation between indoor unit and network remote controller). )Slipping off of centralized control transmission line (TB) at outdoor unit. )At system connected with MELANS, power supply connector (CN0) is inserted to centralized control transmission line of outdoor unit. In case no MELANS used Same symptom for all units in a single refrigerant system? NO YES Check outdoor unit address Confirm address of remote controller with HO displayed ~ 00? YES Check centralized control switch SW- at outdoor unit NO Outdoor unit address setting miss Address setting miss of remote controller Indoor unit + 00? Check address of coupling indoor unit ON? NO Faulty outdoor unit control circuit board YES Switch setting miss Make it ON OFF Indoor address setting miss Remote controller -00? YES Check voltage of indoor unit M- NET transmission terminal block Transmission line wiring miss of indoor unit M-NET ~ 0V? YES Check connection between indoor unit M-NET transmission terminal block (TB) and connector CNM Slipping off of CNM connector YES Slipping off? NO Check Fresh Master SW- Setting miss of Fresh Master SW- NO ON? YES Repair spot in trouble Faulty indoor controller board or remote controller In case with MELANS used When MELANS is used, HO display on the remote controller will disappear at the group registration of the indoor unit and local remote controller. If HO does not disappear after the registration, check the items ) ~ ) in the Cause column. 9

96 Symptom Cause Checking method & countermeasure 88 appears on remote controller at the registration and access remote controller [Generates at registration and confirmation] ) Erroneous address of unit to be coupled. ) Slipping off of transmission line of unit to be coupled (No connection). ) Faulty circuit board of unit to be coupled. ) Installation miss of transmission line. [Confirmation of different refrigerant system controller] ) Breaking of power source of outdoor unit to be confirmed. 6) Slipping off of centralized control transmission line (TB) of outdoor unit. ) Power supply connector (CN0) is not inserted into centralized control transmission line in grouping with different refrigerant system without using MELANS. 8) More than sets of power supply connector are inserted into the centralized control transmission line of outdoor unit. 9) In the system connected with MELANS, power supply connector (CN0) is inserted into the centralized control transmission line of outdoor unit. 0)Short circuit of centralized control transmission line. a) Confirm the address of unit to be coupled. b) Check the connection of transmission line. c) Check the transmission terminal block voltage of unit to be coupled. i) Normal if voltage is DC ~ 0V ii) Check the item d) in case other than i). d) Confirm the power source of outdoor unit to be coupled with the unit to be confirmed. e) Confirm that the centralized control transmission line (TB) of outdoor unit is not slipped off. f) Confirm the voltage of centralized control transmission line. i) Normal in case of 0V ~ 0V ii) Check the items ) ~ 0) left in case that other than i). 9

97 Transmission Power Circuit (0 V) Check Procedure If is not displayed by the remote control, investigate the points of the trouble by the following procedure and correct it. No. Check Item Judgment Response Disconnect the transmission line from TB and check the TB voltage. DC~0 V Check the transmission line for the following, and correct any defects. Broken wire, short circuit, grounding, faulty contact. Except the above-mentioned to No. Check if the following connectors are disconnected in the outdoor unit s control box. MAIN Board: CNS, CNVCC, CNVCC INV Board: CNVCC, CNVCC, CNL, CNR, CNAC Connector disconnected Except the above-mentioned Connect the connectors as shown on the electric wiring diagram plate. to No. Disconnect the wires from CNVCC on the Main board and check the voltage between pins and on the wire side of the CNVCC. Tester +... pin Tester -... pin DC~0 V Except the above-mentioned Check the wiring between CNS and TB for the following, and correct any defects. Broken wire, short circuit, grounding, faulty contact. If there is no trouble, replace the Main board. to No. Disconnect the wiring from CNVCC on the INV board and check the voltage between pins and of CNVCC. Tester +... pin Tester -... pin DC~0 V Check the wiring between CNVCC and CNVCC for the following, and correct any defects. Broken wire, short circuit, grounding, faulty contact. Except the above-mentioned to No. Disconnect the wiring from CNL on the INV board, and check the resistance at both ends of choke coil L. 0.~.Ω Except the above-mentioned to No. 6 Replace choke coil L. 6 Disconnect the wiring from CNR on the INV board, and check the resistance at both ends of R. 9~Ω Except the above-mentioned to No. Replace R. Check the resistance at both ends of F0 on the INV board. 0Ω Except the above-mentioned to No. 8 Replace F0 8 Check the voltage between pins and of CNAC on the INV board. AC98~6 V Except the above-mentioned Replace the INV board. to No. 9 9 Check the voltage between L and N on power supply terminal block TB. AC98~6 V Check the wiring to CNAC for the following and correct any defects. Broken wire, faulty contact. Except the above-mentioned Check the power supply wiring and base power supply, and correct any defects. 96

98 () Investigation of transmission wave shape/noise Control is performed by exchanging signals between outdoor unit, indoor unit and remote controller by M-NET transmission. If noise should enter into the transmission line, the normal transmission will be hindered causing erroneous operation. ) Symptom caused by the noise entered into transmission line Cause Erroneous operation Error code Noise entered into transmission line Signal changes and is misjudged as the signal of other address. Transmission wave shape changes to other signal due to noise. Transmission wave shape changes due to noise, and can not be received normally thus providing no reply (ACK). Transmission can not be made continuously due to the entry of fine noise. Transmission can be made normally, but reply (ACK) or answer can not be issued normally due to noise ) Method to confirm wave shape No fine noise allowed * <with transmission> VHL VBN µs Logical µs µs value 0 Logical µs value µs No fine noise allowed * <without transmission> Check the wave shape of transmission line with an oscilloscope to confirm that the following conditions are being satisfied. The figure should be 0µs/bit ± %. No finer wave shape (noise) than the transmission signal (µs ± %) should be allowed. * The sectional voltage level of transmission signal should be as follows. Logic value Transmission line voltage level 0 VHL =.0V or more VBN =.V or less * However, minute noise from the DC-DC converter or inverter operation may be picked up. 9

99 ) Checking and measures to be taken (a) Measures against noise Check the items below when noise can be confirmed on wave shape or the error code in the item ) is generated. Items to be checked Wiring of transmission and power lines in crossing. Measures to be taken Isolate transmission line from power line (cm or more). Never put them in a same conduit. Check for earthing Checking for wiring method Wiring of transmission line with that of other system in bundle. Use of shield wire for transmission line (for both indoor unit control and centralized control). Repeating of shield at the repeating of transmission line with indoor unit. Are the unit and transmission lines grounded as instructed in the INSTALLATION MANUAL? 6 Earthing of the shield of transmission line (for indoor unit control) to outdoor unit. Arrangement for the shield of transmission line (for centralized control). Wire transmission line isolating from other transmission line. Wiring in bundle may cause erroneous operation like crosstalk. Use specified transmission wire. Type : Shield line CVVS/CPEVS Wire diameter :.mm or more The transmission line is wired with -jumper system. Wire the shield with jumper system as same for transmission line. When the jumper wiring is not applied to the shield, the effect against noise will be reduced. Connect to ground as shown in the INSTALLATION MANUAL. One point earthing should be made at outdoor unit. Without earthing, transmission signal may be changed as the noise on the transmission line has no way to escape. For the shield earth of the transmission line for centralized control, the effect of noise can be minimized if it is from one of the outdoor units in case of the group operation with different refrigerant systems, and from the upper rank controller in case the upper rank controller is used. However, the environment against noise such as the distance of transmission line, the number of connecting sets, the type of connecting controller, and the place of installation, is different for the wiring for centralized control. Therefore, the state of the work should be checked as follows. a) No earthing Group operation with different refrigerant systems One point earthing at outdoor unit Upper rank controller is used Earthing at the upper rank controller b) Error is generated even though one point earth is being connected. Earth shield at all outdoor units. Connect to ground as shown in the user s manual. (b) When the wave height value of transmission wave shape is low, 660 error is generated, or remote controller is under the state of HO. Items to be checked 8 The farthest distance of transmission line is exceeding 00m. 9 The types of transmission lines are different. 0 No transmission power (0V) is being supplied to the idoor unit or the remote control. A Faulty indoor unit/remote controller. Measures to be taken Confirm that the farthest distance from outdoor unit to indoor unit/ remote controller is less than 00m. Use the transmission wire specified. Type of transmission line : Shield wire CVVS/CPEVS Wire dia. of transmission line :.mm or more Refer to Transmission Power Supply (0V) Circuit Check Procedure. Replace outdoor unit circuit board or remote controller. 98

100 ) Treatment of Inverter and Compressor Troubles If the compressor does not work when error codes 0, 0, 0 or 0 are detected, determine the point of malfunction by following the steps in the LED monitor display and countermeasures depending on the check code displayed, then perform the procedures below. No. Check Item Symptoms Treatment How many hours was the power kept on before operation? If it was kept on for hours or longer as specified. It was kept on for less than the specified period. Go to []. Go to [] after keeping the power on for the specified time. When it is restarted, does the trouble reappear? Run the outdoor unit with the wiring to the compressor disconnected. At this time, change SW- on the INV board to ON. Note) The terminals of the disconnected wires should be isolated from each other. The compressor stops and the same error code is displayed. The Inverter stops and the same error code is displayed. If the inverter s output voltage is output with good balance, *. Perform the check of wiring shown in the explanation of each error code. Check the IPM is faulty. (Go to Individual Parts Failure Judgment Methods. ) Check the coil resistance and insulation resistance of the compressor, and if it is normal, run it again, and if the trouble occurs again, replace the compressor. * Insulation resistance : MΩ or more Coil resistance : 0.9 ~ 0.6Ω If the balance in the inverter s output voltage is not good or if the inverter s output voltages are all 0 V (a digital tester cannot be used) *. Check the IPM. Judge that the IPM is faulty. (Go to Individual Parts Failure Judgment Methods. ) If the IPM is normal, replace the G/A board, then perform this item again with SW- ON. If the problem is not solved, replace the INV board. If the problem is solved and you connect the compressor again, turn SW- OFF again. Check the compressor s coil resistance and insulation resistance. * [Cautions when measuring the voltage and current of the inverter s power circuit.] Since the voltage and current on the inverter s power supply side and its output side do not have a sine waveform, the measurement values will differ depending on the measuring instrument and the circuit measured. In particular, as the inverter s output voltage has a pulse waveform, the output frequency also changes, so differences in measurement values will be great depending on the measuring instrument. When checking if the inverter s output voltage is unbalanced or not (relative comparison of the voltages between each of the lines), if you are testing with a portable tester, be sure to use an analog tester. Use a tester of a type which can be used to judge if the IPM or diode module is faulty. In particular, in cases where the inverter s output frequency is low, there are cases where the variations in measured voltage values between the different wires will be great when a portable digital tester is used, when in actuality they are virtually equal, and there is danger of judging that the inverter is faulty. It is recommended when checking the inverter s output voltage values (when measuring absolute values), that, if a measuring device for business frequencies is used, a rectified voltage meter (with a symbol) be used. Correct measurement values cannot be obtained with an ordinary portable tester. (either analog or digital) 99

101 ) Treatment of Fan Motor Related Troubles Condition Possible Cause Check Method and Treatment It won t run for 0 minutes or longer when the AK ) The power supply voltage is abnormal. If there is an open phase condition before the breaker, after the breaker or at the power supply terminal blocks TBA or value is 0%. (When TBB, correct the connections. the MAIN board s SW is set as shown below, the AK value is displayed by If the power supply voltage deviates from the specified range, connect the specified power supply. the service LED.) SW = The fan motor s vibration is great. ) Wiring is faulty. For the following wiring, check the connections, check the contact at the connectors, check the tightening torque at parts where screws are tightened, check the wiring polarity, check for a broken wire and 6 check for grounding. TBA~NF~TBB~CNTR~T0~CNTR TBB~CNPOW, CNFAN~CN0~CNMF CNFC~CNFC * Check if the wiring polarity is as shown on the wiring diagram plate. ) The motor is faulty. ) A fuse (F, F, F) is defective. ) The transformer (T0) is defective. 6) The circuit board is faulty. Measure the resistance of the motor s coils: 0~60Ω Measure the motor s insulation resistance with a megger: 0 MΩ (DC 00 V) or more If a fuse is defective, replace it. Judge that T0 is faulty. Go to Individual Parts Failure Judgment Methods. If none of the items in ) to ) is applicable, and the trouble reappears even after the power is switched on again, replace the circuit board using the following procedure. (When replacing the circuit board, be sure to connect the connectors and ground wire, etc. securely.) Replace the FANCON board only. If it recovers, the FANCON board is defective. Replace the FANCON board and replace the MAIN board. If it recovers, the MAIN board is defective. If the trouble continues even after and above, then both boards are defective. 00

102 6) Troubleshooting at breaker tripping Check items Check the breaker capacity. Check the a short circuit or grounding in the electrical system other than the inverter. Check the resistance between terminals on the terminal block TBA for power source. 0 ~ several ohms or improper megohm value Checking by powering again. Main power source circuit breaker tripping No display of remote controller Measures to be taken The breaker s capacity should be proper. Correct any defects. Check each part inside the inverter power circuit (resistance, megohm or the like). a) Diode stack Refer to Troubleshooting of diode stack. b) IPM Refer to Troubleshooting of IPM. c) Rush current protection resistor d) Electromagnetic contactor e) DC reactor * For c) ~ e), refer to Individual Parts Failure Judgement Methods. Operational check by operating air conditioner Normal operation without breaker tripping. Breaker tripping a) As there is a possibility of instantaneous short circuit generated, find the mark of the short circuit for repair. b) When a) is not applicable, the compressor may be faulty. The ground fault of inverter output/compressor can be supposed. Disconnect the wiring to the compressor and check the insulation resistance of the following parts with a megger. a) Compressor terminals. b) Inverter output. 0

103 ) Individual Parts Failure Judgment Methods. Part Name Diode Stack (DS) Intelligent Power Module(IPM) Electromagnetic Contactor (C) Judgment Method Refer to Judging Diode Stack Failure. Refer to Judging IPM Failure. Measure the resistance value at each terminal. A A /L /L /L /T /T 6/T Check Location A-A /L-/T /L-/T /L-6/T Judgment Value 0.k~.kΩ Rush Current Protection Resistor (R, ) DC Reactor (DCL) Measure the resistance between terminals:.k~.kω Measure the resistance between terminals: Ω or lower Measure the resistance between the terminals and the chassis: Cooling Fan (MF) Transformer (T0) AC Current sensor (ACCT) Measure the resistance between terminals: 0.k~.kΩ Measure the resistance between terminals on the primary side (CNTR):.0k~.kΩ Measure the resistance between terminals on the secondary side (CNTR): 0~60Ω Measure the resistance between terminal between pin and pin, pin and pin : ~ (Ω) [Caution at replacement of inverter parts] IPM and G/A board should be replaced together at the same time. When the IPM is damaged, the G/A board may possibly be broken, and the use of the broken G/A board damages the normal IPM. Therefore, replace the IPM and G/A board together at the same time. However, if the G/A board is damaged, judge that the IPM is faulty, then judge whether replacement is necessary or not. Fully check wiring for incorrect and loose connection. The incorrect or loose connection of the power circuit part wiring like IPM and diode module causes to damage the IPM. Therefore, check the wiring fully. As the insufficient tightening of screws is difficult to find, tighten them together additionally after finishing other works. For the wiring of the base for IPM, observe the wiring diagram below carefully as it has many terminals. Coat the grease for radiation provided uniformly onto the radiation surface of IPM /diode modules. Coat the grease for radiation on the full surface in a thin layer, and fix the module securely with the screw for fastening. As the radiation grease attached on the wiring terminal causes poor contact, wipe it off if attached. 0

104 Motor (Compressor) Red White Black IPM U V W G/A board N P Black Red Capacitor (C,C) 0

105 () Troubleshooting the major components of the BC controller ) Pressure sensor Pressure sensor troubleshooting flow START Check pressure sensor, PS, PS, connectors for disconnection, looseness, or incorrect attachment. Note OK? No Yes Take corrective action. running? No Yes Note Check on the LED monitor display. TH or LPS of outdoor unit. HPS of outdoor unit PS, PS of BC controller and confirm the following relationship HPS > PS PS > TH or LPS (puressure calculated value) OK? No Yes Stop the unit (compressor OFF). Check that refrigerant piping and transmission line connections are in agreement between outdoor unit and BC controller. At least 0 minutes passed since stopping? Yes Check PS, PS on LED monitor display and confirm that none of the detected pressure values is below kg/cm G (0.098MPa). No Note OK? Yes No Correct refrigerant piping and transmission line. OK? Yes HPS PS PS TH or LPS (pressure calculated value) (The difference is less than kg/ cm G (0.098MPa) OK? Yes No board or pressure sensor abnormality. No No Confirm the following relationship PS PS? Yes No Note Check for the faulty connector on applicable pressure sensor. OK? Yes Note Remove the pressure sensor connector from the board, and check the pressure. Pressure range within 0 to kg/cm G (0.098MPa) No No Repair faulty connection. Check that refrigerant piping and transmission line connections are in agreement between outdoor unit and BC controller. OK? Yes No Correct refrigerant piping and the transmission line. Short connectors and on the board and check the pressure. Pressure of at least kg/cm G (.MPa) indicated? No Yes Replace the wrong puressure sensor by the correct pressure sensor, and confirm detected pressure is indicated correctly. OK? No Yes Change pressure sensor. Change board. 0

106 Note : Symptoms of incorrect connection of BC controller pressure sensor to the board Symptom Cooling-only Cooling-principal Heating-only Heating-principal Normal Insufficient cooling. SC large SC6 small PHM < 0 Warm indoor SC small. Warm indoor thermo ON especially noise. SC small SC6 small PHM < 0 Insufficient heating Warm indoor SC small Warm indoor thermo ON especially noise SC large SC6 small PHM < 0 Note : Check using LED monitor display switch (outdoor MAIN board SW) Measured Data Signal SW Setting Remarks High pressure of outdoor HPS ON See converter. Low pressure saturation temperature TH ON See converter. Low pressure of outdoor LPS ON See converter. BC controller pressure (liquid measurement) (intermediate) PS PS ON ON Convert saturation temperature to desired pressure using converter. Note : Check CNP (liquid measurement) and CMP (intermediate) connectors on BC controller board for disconnection or looseness. Note : With the sensor of the applicable connector removed from the board, use the LED monitor display switch (Note ) to check the pressure value. Pressure Sensor Replacement Precaution (Pressure sensor output voltage) 0

107 ) Sensor Thermistor troubleshooting flow Start Disconnect applicable thermistor connector from the board. Note Note Measure temperature of applicable thermistor (actual measured value). Note Check thermistor resistance value. Compare temperature for thermistor resistance value with actual measured valued. No difference? Yes No Note Insert applicable thermistor connector into board, and check sensor input temperature on LED monitor for difference. Note Change thermistor. No difference? No Yes No abnormality. Check for connection problem. Change the controller board. 06

108 Note : Board connector CN0 corresponds to TH through TH, while connector CN corresponds to TH through TS. Remove the applicable connector and check the sensor for each number. Note, :. Pull the sensor connector from the I/O board. Do not pull on the lead wire.. Measure resistance using a tester or other instrument.. Compare measured values with values on the graph below. A value within a range of ±0% is normal. Resistance measurement point (connector) Touch the probes of the tester or other instrument to the shaded areas to measure. sensor resistance (graph) Resistance value (kω) Thermistor Ro= kω Rt=exp 60 ( +t t ) ( C) Note : Check using LED monitor display switch (outdoor MAIN board SW) Measured Data Signal SW Setting Remarks Liquid inlet temperature TH ON See converter. Bypass outlet temperature TH ON See converter. Bypass outlet temperature TH ON See converter. Bypass inlet temperature TH ON See converter. 0

109 ) LEV, Solenoid Valve Troubleshooting Flow No cooling No heating Note Check disconnection or looseness of connectors. Is there a problem? Yes Correct the problem. Operate in cooling or heating ( system only when there are plural systems) Cooling or heating operation? Check if LEV are fully open Note Heating operation Check if LEV are fully shut. Note LEV fully open? Yes Check if LEV is controlled by superheat. No Note Check LEV No LEV fully shut? Yes Note Check if LEV are controlled by differential pressure. * LEV is not controlled. Yes No Check LEV No LEV are not controlled Yes * Check if SVM is ON. Check if SVM is OFF. SVM ON No No SVM OFF Yes Check SVM Yes Check if SVA, SVC are ON. Check if SVA, SVC are OFF. SVA, SVC ON No No SVA, SVC OFF Yes Check SVA, SVC Yes Check if SVB is OFF. Check if SVB is ON. SVB OFF No No SVB ON Yes Check SVB Yes Completion *. SVM is not built in depending on models. 08

110 LEV Note : Symptoms of incorrect connection to BC controller LEV board LEV No. Cooling-only Cooling-main Heating-only Heating-main ) Normal ) Insufficient cooling SH small, SC small SC6 small Branch piping SC small Insufficient cooling, insufficient heating SH small, SC small SC6 large, Branch piping SC small PHM large Heating indoor SC small PHM large Insufficient cooling Heating indoor SC small PHM large Improper installation is the same for and, so it is omitted here. Note : Method for checking LEV full open, full closed condition Check LEV full opening (pulse) using the LED monitor display (outdoor controller board SW). Full opened: 000 pulses Full closed: 60 pulses (LEV may be greater than 60 during full heating operation.) With LEV full opened, check for pressure differential by measuring temperature of piping on both sides. With LEV full closed, check for refrigerant noise. Note : Use the following table to determine opening due to LEV differential pressure control and superheat control. BC controller LEV basic operation characteristics Region Failure mode Operating mode Description Normal range LEV pulse LEV pulse Small Large Small Large Heating-only Heating-main Cooling-main Cooling-only Cooling-main Heating-only Heating-main Cooling-only Cooling-main Heating-only Heating-main High pressure (PS) - medium pressure (PS) is large. High pressure (PS) - medium pressure (PS) is small. SH is large. High pressure (PS) - mid pressure (PS) is small. SC6 and SH are small. High pressure (PS) - mid pressure (PS) is large..0 ~. kg/cm G (0.0~0.MPa) SH<.0 ~. kg/cm G (0.0~0.MPa) SC6>6 SH>.0 ~. kg/cm G (0.0~0.MPa) 09

111 (Self-diagnostic monitor) Measured Data Signal OUTDOOR MAIN board SW Setting LEV pulse LEV pulse ON ON * There are not LEV and LEV on CMB-P-V-E. BC controller bypass output superheat BC controller intermediate subcool BC controller liquid subcool SH SC6 SC ON ON ON (Solenoid Valve Troubleshooting Flow) To LEV Brown Red Blue Orange Yellow White Start Visually check for disconnection between connectors and terminals, and confirm correct lead colors. Intermediate connector 6 OK? Brown Red Blue Orange Yellow White Controller board 6 Remove connectors from the board and use a tester to check conduction. Check between connectors -- and OK? Yes No No Correction. Check for the following: LEV full open: ticking sound LEV full closed: no sound OK? Yes Confirm if LEV is closed fully. OK? Yes Attach check LEDs illustrated nearby to board connectors and confirm that LEDs light for 0 seconds. No No 0kΩ LED Change LEV Change LEV 6 Yes Adjust, repair. Use a tester to measure resistance between each coil (red-white, red-orange, brown-yellow, brown-blue). Correct value is: 0Ω±0% OK? Yes No Change the board. End OK? No Yes Change LEV 0

112 Solenoid Valve Solenoid valve troubleshooting Operation OFF? Check solenoid valve wiring for incorrect connection, and connector disconnection or looseness. No problem. No Operate cooler and heater for the applicable solenoid valve s refrigerant system only. Clicking noise produced when working timing? Yes Note Yes No Correct the problem. Remove the coil and check for a magnetic force. Magnetic force is OK? Yes Note Measure pipe temperature of inlet and outlet sides of solenoid valve. No temperature differential: OK differential: NG No Stop the unit. Disconnect solenoid valve connector from the board and check for a solenoid coil conductance. Yes Measure piping temperature on both sides of solenoid valve and check for following. Solenoid valve ON: no differential Solenoid valve OFF: differential Yes OK? No Conductance present? Yes With the solenoid valve connector is disconnected from the board, use remote controller to turn on the unit and check the output (0-0V) from the controller board. 0-0V output? No No Yes OK? No Change the control board. Change the solenoid valve. Yes Solenoid valve normal Solenoid valve faulty

113 Solenoid valves (SVA, SVB, SVC, SVM) Coordination signals output from the board and solenoid valve operations. *SVM is not built in depending on models. Note : (SVA, SVB, SVC) SVA, SVB and SVC are turned on and off in accordance with operation mode. Mode Branch port Cooling Heating Stopped Defrosting SVA ON OFF OFF OFF SVB OFF ON OFF OFF SVC ON OFF OFF OFF (SVM) SVM is turned on and off in accordance with operation mode. Operation Mode Cooling-only Cooling-principal Heating-only Heating-principal Defrosting Stopped SVM ON OFF OFF OFF ON OFF Note : (SVA, SVB, SVC) Measure temperature of piping on either side of SVA -A Measure temperature of piping on either side of SVB -B (SVM) Measure temperature at points marked X. B A CMB-P-V-E ) BC controller transformer BC Controller control board CNTR CN0 Red Blue Brown Brown CNTR()-() Normal Approximately 90Ω Malfunction Open or shorted CN0()-() Approximately.Ω * Disconnect the connector before measurement.

114 [] BC Controller Disassembly Procedure () Service panel Be careful on removing heavy parts. Procedure. Remove the two screws securing the electric panel box, and then remove the box. Photos & Illustrations. Remove the four screws securing the front panel and then remove the panel. Two of the screws are not visible until you remove the electric panel box.. Remove the two screws securing the ceiling panel. Next, lifting up on the panel slightly, slide it inwards and then remove it. The inside of the ceiling panel is hooked on a pin.. Remove the single screw that secures the side panel, and then remove the panel. Celling panel fixing screw Celling panel BC controller unit Pin

115 () Control Box Procedure <CMB-P0, 0, 06V-D>. Removing the single screw that secures the electric panel box cover provides access to the box contents for checking. Check electrical lead wires and transmission lead terminal connections. Check the transformer. Check the address switch. Use the self-diagnostic switch to check the LED display. Be careful on removing heavy parts. Photos. Disconnect the power supply lead, transmission lead, transformer lead connector, and address switch wiring connector. Removing the screw securing the inner cover provides access for checking the entire controller board.. Note the following precautions whenever replacing the controller board. Be sure you do not confuse a Type A controller board with a Type B controller board. Take care to avoid mistakes when connecting leads and connectors, and double-check for incomplete and loose connections. Check to make sure that DIP switch settings are the same before and after replacement. Important! You do not need to remove the two electric panel screws if you are checking electric panel box contents only. <CMB-P08, 00, 0, 06V-E> Removing the single screw that secures the electric panel box cover provides access to the controller board and all of the relay board for checking. So it is not necessary to work according to avobe.

116 () Thermistor (Liquid and gas piping temperature detection) Be careful when removing heavy parts. Procedure. Remove the service panel Use the procedure under ()-. to check TH, TH, and TH. Photos. Disconnect the piping sensor lead from the controller panel. TH - TH (CN0) TH, TH6 (CN) TH TH TH. Pull the temperature sensor from the temperature sensor housing and replace it with a new sensor.. Connect the temperature sensor lead securely to the controller board. TH6 () Pressure Sensor Procedure. Remove the sensor panel. Use the procedure under ()-. to check PS and PS. Photos. Disconnect the connector of the applicable pressure sensor from the controller board and insulate the connector. Liquid pressure sensor (CNP) Intermediate pressure sensor (CNP) PS. Install a new pressure sensor at the location shown in the photograph, and plug the connector into the controller board. Important In the case of gas leakage from the pressure sensor, take actions to fix the leak before performing the above procedure. PS

117 () LEV Be careful on removing heavy parts. Procedure. Remove the service panel. See ()-... Photos. Replace the applicable LEV. Important! When performing the above procedure, be sure to allow for enough service space in the ceiling area for welding. When conditions require, the unit can be lowered from the ceiling before staring work. LEV LEV (6) Solenoid Valve Coil Procedure. Remove the service panel. See ()-... Photos & Illustrations. Disconnect the connector of the applicable solenoid valve.. Remove the solenoid valve coil. SVA, SVB, and SVM solenoid valve coils can be serviced from the maintenance port. SVC can serviced from the back if service space is available in the back. To remove the back panel, remove the two screws that secure it.. When the solenoid valve is defective, remove the unit front panel, disassemble the solenoid valve block, and check the interior of the valve. When disassembly space or footing for disassembly of the solenoid valve block in the vicinity of the flow controller is not available, the unit can be lowered from the ceiling to perform the work. To view the interior of a valve, use a torque wrench to open the screw cover of the movable component compartment and the plunger. When replacing the screw cover and plunger, tighten them to the specified torque. SVA screw cover:... 0 kg m (.0 N m) SVB screw cover:... kg m (. N m) SVA, B, C plungers:... 6 kg m (0.6 N m) Solenoid valve Pilot type Important! You cannot check the valve interiors of SVC and SVM. Be sure to tighten screw covers and plungers to specified torque values. Under-tightening can cause gas leaks, over-tightening can cause abnormal operation. Direct drive type 6

118 Check Code List Check Code Check Content 00 Serial transmission abnormality 0900 Trial operation 0 Discharge temperature abnormality Low pressure saturation temperature sensor abnormality (TH) Low pressure saturation Liquid level sensing temperature sensor abnormality (TH) temperature abnormality Liquid level sensing temperature sensor abnormality (TH) 0 Low pressure abnormality (OC) 0 High pressure abnormality (OC) 68 Liquid side pressure abnormality (BC) 0 Intermediate pressure abnormality (BC) 00 Overcharged refrigerant abnormality 0 Low refrigerant abnormality 0 Suction pressure abnormality 00 Leakage (water) abnormality 0 Drain pump abnormality 0 Drain sensor abnormality 0 Reverse phase abnormality Power supply sync signal abnormality 6 Fan speed abnormality (motor abnormality) 00 VDC sensor/circuit abnormality 0 Bus voltage abnormality 0 Radiator panel overheat protection 0 Over loard protection 0 IPM Alarm output / Bus voltage abnormality / Over Current Protection 60 Cooling fan abnormality 0 Air inlet (TH:IC) Discharge (TH:OC) 0 Liquid pipe (TH:IC) Low pressure saturation (TH:OC) 0 Gas pipe (TH:IC) Accumulater liquid level (LD) 0 Thermal sensor Accumulater liquid level (LD) 0 abnormality Liquid pipe (TH) 06 Ambient temperature (TH6) 0 SC coil outlet (TH) 08 SC coil bypass outlet (TH8) 09 CS circuit (TH9) 0 Radiator panel (THHS) Compressor shell temperature (TH0) 0 Pressure sensor abnormality (OC) Liquid side pressure sensor abnormality (BC) 0 Intermediate side pressure sensor abnormality (BC) 0 IAC sensor/circuit abnormality 6600 Multiple address abnormality 660 Transmission processor hardware abnormality 660 Transmission circuit bus-busy abnormality

119 Check Code Check Content 6606 Communications with transmission processor abnormality 660 No ACK abnormality 6608 No response abnormality 00 Total capacity abnormality 0 Capacity code abnormality 0 Connected unit count over 0 Address setting abnormality 06 Characteristics setting abnormality 0 Connection number setting abnormality Remote control sensor abnormality 0 Different indoor model connected abnormality Intermittent fault check code Trouble Delay Cope Trouble Delay Content 0 Preliminary discharge temperature abnormality or preliminary discharge thermal sensor abnormality (TH) 0 Preliminary liquid pipe temperature sensor abnormality (TH) Preliminary low pressure saturation abnormality or preliminary low pressure saturation sensor abnormality (TH) Preliminary THHS sensor/circuit abnormality 6 Preliminary sub-cool coil outlet thermal sensor abnormality (TH) Preliminary sub-cool coil bypass outlet thermal sensor abnormality (TH8) 9 Preliminary sub-cool coil bypass inlet thermal sensor abnormality (TH9) Preliminary ambient temperature thermal sensor abnormality (TH6) Preliminary compressor shell thermal sensor abnormality (TH0) 0 Preliminary high pressure abnormality or preliminary pressure sensor abnormality 600 Preliminary overcharged refrigerant abnormality 60 Preliminary lacked refrigerant abnormality 60 Preliminary suction pressure abnormality 60 CS circuit block abnormality Preliminary IAC sensor/circuit abnormality 00 Preliminary VDC sensor/circuit abnormality Preliminary serial transmission abnormality 0 Preliminary bus voltage abnormality 0 Preliminary heat sink overheating abnormality 0 Preliminary overload protection 0 Preliminary overcurrent protection 60 Preliminary cooling fan abnormality 8

120 [] Self-diagnosis and Countermeasures Depending on the Check Code Displayed () Mechanical Checking code Meaning, detecting method Cause Checking method & Countermeasure 00 Serial If serial transmission cannot be transmission established between the MAIN and abnormality INV boards. ) Wiring is defective. Check, the connections,, contact at the connectors and, for broken wires in the following wiring. CNRS - CNRS CNAC - TBB ) Switches are set wrong on the INV board. ) A fuse (F0) on the INV board is defective. SW- on the INV board should be OFF. If the fuse is melted, (if the resistance between the both ends of fuse is ), replace the fuse. ) The circuit board is defective. If none of the items in ) to ) is applicable, and if the trouble reappears even after the power is switched on again, replace the circuit board by the following procedure (when replacing the circuit board, be sure to connect all the connectors, ground wires, etc. securely). If serial transmission is restored after the INV board only is replaced, then the INV board is defective. If serial transmission is not restored, reinstall the INV board and replace the MAIN board. If serial transmission is restored, the MAIN board is defective. If serial transmission is not restored by and above, replace both boards. 9

121 Checking code Meaning, detecting method Cause Checking method & Countermeasure 0 Discharge temperature abnormality (Outdoor unit). When 0 C or more discharge temperature is detected during operations (the first time), outdoor unit stops once, mode is changed to restart mode after minutes, then the outdoor unit restarts. ) Gas leak, gas shortage. ) Overload operations. ) Poor operations of indoor LEV. ) Poor operations of OC controller LEV:. When 0 C or more temp. is detected again (the second time) within 0 minutes after stop of outdoor unit, emergency stop is observed with code No. 0 displayed.. When 0 C or more temp. is detected 0 or more minutes after stop of outdoor unit, the stop is regarded as the first time and the process shown in is observed.. 0 minutes after stop of outdoor unit is intermittent fault check period with LED displayed (0). Cooling : LEV ) Poor operations of BC controller LEV: Cooling-only : LEV Cooling-main : LEV, Heating-only, Heating-main: LEV Defronst : LEV 6) Poor operations of BC controller SVM : Cooling-only, defrost ) Poor operations of BC controller SVA : Cooling-only, Cooling-main 8) Poor operations of BC controller SVB : Heating-only, Heating-main 9) Poor operations of solenoid valves. SV ( ~ 6) (PURY) Heating-only, Heating-main 0)Setting error of connection address (PURY). )Poor operations of ball valve. See Refrigerant amount check. Check operating conditions and operation status of indoor/outdoor units. Check operation status by actually performing cooling or heating operations. Cooling : Indoor LEV (Cooling-only) LEV (PUHY) LEV, (BC) SVM (BC) SVA (BC) Heating : Indoor LEV (Heating-only) LEV (BC) SVB (BC) SV ~ 6 (PURY) See Trouble check of LEV and solenoid valve. Check address setting of indoor unit connection. Confirm that ball valve is fully opened. )Outdoor unit fan block, motor trouble, poor operations of fan controller Heating (Heating-only, Heating-main). ) ~ ) : Rise in discharge temp. by low pressure drawing. Check outdoor fan. See Trouble check of outdoor fan. )Gas leak between low and high pressures. -way valve trouble, compressor trouble, solenoid valve SV trouble. )Poor operations of solenoid valve SV. Bypass valve SV can not control rise in discharge temp. )Thermistor trouble. 6)Thermistor input circuit trouble on control circuit board. Check operation status of cooling-only or heating-only. See Trouble check of solenoid valve. Check resistance of thermistor. Check inlet temperature of sensor with LED monitor. * There are not LEV and LEV on CMB-P-V-E. 0

122 Checking code Meaning, detecting method Cause Checking method & Countermeasure Low pressure saturation temperature trouble Low pressure saturation temperature sensor abnormality (TH) Liquid level detecting temperature sensor abnormality (TH) Liquid level detecting temperature sensor abnormality (TH). When saturation temperature sensor (TH) or liquid level detecting temperature sensors (TH, TH) detects -0 C or less (the first time) during operations, outdoor unit stops once, mode is changed to restart mode after minutes, then the outdoor unit restarts.. When -0 C or less temp. is detected again (the second time) within 0 minutes after stop of outdoor unit, error stop is observed with code Nos.,, or displayed.. When -0 C or less temperature is detected 0 or more minutes after stop of outdoor unit, the stop is regarded as the first time and the process shown in. is observed.. 0 minutes after stop of outdoor unit is intermittent fault check period with LED displayed. Note:. Low press. saturation temperature trouble is not detected for minutes after compressor start, and finish of defrosting operations, and during defrosting operations.. In the case of short/open of TH~TH sensors before starting of compressor or within 0 minutes after starting of compressor,,, or is displayed too. ) Gas leak, Gas shortage. ) Insufficient load operations. ) Poor operations of indoor LEV. ) Poor operations of OC controller LEV: Cooling : LEV ) Poor operations of BC controller LEV: Cooling-only : LEV Cooling-main : LEV, Heating-only, Heating-main: LEV Defrost : LEV 6) Poor operations of BC controller SVM: Cooling-only, Defrost ) Poor operations of BC controller SVM: Cooling-only, Cooling-main 8) Poor operations of BC controller SVB: Heating-only, Heating-main 9) Solenoid valve trouble (SV ~ 6) (PURY). PUHY-P (SV ~ ) Heating-only, Heating-main 0)Setting error of connection address. )Poor operations of ball valve. )Short cycle of indoor unit. )Clogging of indoor unit filter. )Fall in air volume caused by dust on indoor unit fan. )Dust on indoor unit heat exchanger. 6)Indoor unit block, Motor trouble. 0)~) : Fall in low pressure caused by evaporating capacity in cooling-only cooling-principal operation. )Short cycle of outdoor unit. 8)Dust on outdoor heat exchanger. 9)Indoor unit fan block, motor trouble, and poor operations of fan controller. 6)~8) : Fall in low press. caused by lowered evaporating capa-city in heating-only heating-principal operation. See Refrigerant amount check. Check operating conditions and operation status of outdoor unit. Check operation status by actually performing cooling-only or heating-only operations. Cooling-only Heating-only : indoor LEV LEV (PUHY) LEV, (BC) SVM (BC) SVA (BC) : indoor LEV LEV (PURY) (BC) SVB (BC) SV~6 (PURY) SV~ (PUHY-P) See Trouble check of LEV and solenoid valve. Check address setting of indoor unit connector. Confirm that ball valve is fully opened. Check indoor unit, and take measu-res to troube. Check outdoor unit, and take measures to trouble. Check outdoor unit fan. See Trouble check of outdoor unit fan. 0)Poor operations of solenoid valve SV. Bypass valve (SV) can not control low pressure drop. )Thermistor trouble (TH~TH0). )Pressure sensor abnormality. See Trouble check of solenoid valve. Check resistance of thermistor. See Trouble check of pressure sensor. )Control circuit board thermistor abnormality and pressure sensor input circuit abnormality. )Poor mounting of thermistor (TH~TH0). Check inlet temp. and press. of sensor by LED monitor.

123 Checking code Meaning, detecting method Cause Checking method & Countermeasure 0 0 Low pressure abnoramlity High pressure abnoramlity (Outdoor unit) When starting from the stop mode for the first time, (if at the start of bind power transmission, the end of bind power transmission, and in the mode when the thermostat goes OFF immediately after the remote control goes ON, the following compressor start time is included), if the low pressure pressure sensor before starting is at.0 kg/cm G (0.098MPa), operation stops immediately.. When press. sensor detects 8kg/cm G (.MPa) or more during operations (the first time), outdoor unit stops once, mode is changed to restart mode after minutes, then the outdoor unit restarts.. When 0kg/cm G (.9MPa) or more pressure is detected again (the second time) within 0 minutes after stop of outdoor unit,error stop is observed with code No. 0 displayed.. When 8kg/cm G (.MPa) or more pressure is detected 0 or more minutes after stop of outdoor unit, the detection is regarded as the first time and the process shown in is observed.. 0 minutes after stop of outdoor unit is intermittent fault check period with LED displayed. ) Internal pressure is dropping due to a gas leak. ) The low pressure pressure sensor is defective. ) Insulation is torn. ) A pin is missing in the connector, or there is faulty contact. ) A wire is disconnected. 6) The control board s low pressure pressure sensor input circuit is defective. ) Poor operations of indoor LEV. ) Poor operations of outdoor LEV (PUHY). ) Poor operations of BC controller LEV: Heating-only, heating-principal: LEV Defrost: LEV ) Poor operations of BC controller SVM: Cooling-only, defrost ) Poor operations of BC controller SVA: Cooling-only, cooling-main 6) Poor operations of BC controller SVB: Heating-only, heating-main ) Solenoid valve SV ( ~ 6) trouble (PURY). SV ~ (PUHY-P) Cooling-only, cooling-main 8) Setting error of connection address. 9) Poor operations of ball valve. Refer to the item on judging low pressure pressure sensor failure. Check operations status by actually performing cooling or heating operations. Cooling : Heating : Indoor LEV LEV (PUHY) LEV, (BC) SVM SVA (BC) SV~6 (PURY) SV~ (PUHY-P) Indoor LEV LEV (BC) SVB (BC) See Trouble check of LEV and solenoid valve. Check address setting of indoor unit connector. Confirm that ball valve is fully open-ed.. Error stop is observed immediately +0 when press. switch (0 kg/ cm G (.9-.MPa)) operates in addition to pressure sensor. 0)Short cycle of indoor unit. )Clogging of indoor unit filter. )Fall in air volume caused by dust on indoor unit fan. )Dust on indoor unit heat exchanger. )Indoor unit fan block, motor trouble. 9)~) : Rise in high pressure caused by lowered condensing capacity in heating-only and heating-principal operation. Check indoor unit and take measures to trouble. )Short cycle of outdoor unit. 6)Dust on outdoor unit heat exchanger. )Outdoor unit fan block, motor trou-ble, poor operations of fan controller. )~):Rise in high press. caused by lowered condensing capacity in cooling-only and cooling-pincipal operation. 8)Poor operations of solenoid valves SV, (Bypass valves (SV, ) can not control rise in high pressure). Check outdoor unit and take measures to trouble. Check outdoor unit fan See Trouble check of outdoor unit fan. See Trouble check of solenoid valve. 9)Thermistor trouble (TH, TH, TH6). Check resistance of thermistor. 0)Pressure sensor trouble. Check Trouble check of pressure sensor. )Control circuit board thermistor trouble, press. sensor input circuit trouble. Check inlet temperature and press. of sensor with LED monitor.

124 Checking code Meaning, detecting method Cause Checking method & Countermeasure 0 High pressure abnoramlity (Outdoor unit) When press. sensor detects kg/ cm G (0.098MPa) or less just before starting of operation, erro stop is observed with code No. 0 displayed. ) Fall in internal press. caused by gas leak. ) Press. sensor trouble. ) Film breakage. ) Coming off of pin in connector portion, poor contact. ) Broken wire. 6) Press. sensor input circuit trouble on control circuit board. See Trouble check of pressure sensor. 68 Liquid side When liquid side press, sensor, gas side pressure sensor, or intermediate pressure sensor detects 0kg/cm G (.9MPa) or more, error stop is observed with code No. 68, or 0 displayed. ) Poor operations of indoor LEV. ) Poor operations of BC controller LEV: Heating-only, heating-principal: LEV Defrost: LEV ) Poor operations of BC controller SVM: Cooling-only, defrost ) Poor operations of BC controller SVA: Cooling-only, cooling-principal ) Poor operations of BC controller SVB: Heating-only, heating-principal 6) Solenoid valve SV ( ~ 6) trouble. Cooling-only, cooling-principal ) Setting error of connection address. Check operations status by actually performing cooling or heating operations. Cooling : Indoor LEV LEV, SVM SVA SV~6 Heating : Indoor LEV LEV SVB See Trouble check of LEV and solenoid valve. Check address setting of indoor unit connector. 8) Poor operations of ball valve. Confirm that ball valve is fully opened. 0 High pressure abnoramlity (BC controller) Intermediate side 9) Short cycle of indoor unit. 0)Clogging of indoor unit filter. )Fall in air volume caused by dust on indoor unit fan. )Dust on indoor unit heat exchanger. )Indoor unit fan block, motor trouble. 9)~) : Rise in high pressure caused by lowered condensing capacity in heating-only and heating-principal operation. )Short cycle of outdoor unit. )Dust on outdoor unit heat exchanger. 6) Outdoor unit fan block, motor trouble, poor operations of fan controller. )~6) : Rise in high press. caused by lowered condensing capacity in cooling-only and cooling-principal operation. Check indoor unit and take measures to trouble. Check outdoor unit and take measures to trouble. Check outdoor unit fan. See Trouble check of outdoor unit fan. )Poor operations of solenoid valves SV,. (Bypass valves (SV, ) can not control rise in high pressure.) See Trouble check of solenoid valve. 8)Thermistor trouble (TH, TH, TH6). Check resistance of thermistor. 9)Pressure sensor trouble. Check Trouble check of pressure sensor. 0)Control circuit board thermistor trouble, press. sensor input circuit trouble. )Poor mounting of thermistor. (TH, TH, H6) Check inlet temperature and press. of sensor with LED monitor.

125 Checking code Meaning, detecting method Cause Checking method 00 Overcharged refrigerant abnormality. When discharge superheart 0 deg is keeping for 0 minutes or discharge superheat 0 deg for minutes, outdoor unit stops once, and after minutes, the unit restarts. For 60 minutes after unit stopped is intermittent fault check period.. When discharge superheart 0 deg is keeping for 0 minutes or discharge superheat 0 deg for minutes again (second time), the unit stops and error code 00 is displayed.. In case of SW-6 ON, the detection for the second time is followed by the first time. ) Excessive refrigerant charge. ) Thermistor trouble (TH). ) Pressure sensor trouble (6HS). ) Control circuit board trouble. Check refrigerant amount. Check resistance of thermistor. See trouble shooting of pressure sensor. Check temperature and pressure sensor with LED monitor. 0 Insufficient refrigerant abnormality Lacked refrigerant abnormality. When the unit condition is as follows, the compressor is stopped (st detection) and after minutes, the compressor is restarted automatically. PUHY-P00 0YMF-C F<60Hz and TH0>8 C continuously for 60 minutes. F<60Hz and TH0>9 C continuously for minutes. F 60Hz and TH0>00 C continuously for 60 minutes. F 60Hz and TH0>0 C continuously for minutes. PURY-P00 0YMF-C F<60Hz and TH0>8 C continuously for 60 minutes. F<60Hz and TH0>9 C continuously for minutes. F 60Hz and TH0>00 C continuously for 60 minutes. F 60Hz and TH0>0 C continuously for minutes.. If the temperature rises again as above within hours after the outdoor unit is stopped (nd detection), an error stop is performed, and the check code 0 is displayed.. If the temperature rises again as above within hours after the outdoor unit is stopped, it becomes the first detection again, and operation is the same as in above.. The hour period after the outdoor unit stops is the abnormal delay period, and LED display is carried out during the abnormal stop delay. ) Gas leakage, insufficient gas. ) Overload operation. ) Indoor unit LEV operation is faulty. ) Outdoor unit LEV operation is faulty. ) Outdoor unit SLEV operation is faulty. 6) Ball valve operation is faulty. ) The thermistor is faulty. 8) The control board s thermistor input circuit is faulty. Refer to the item on judging the refrigerant volume. Check the indoor and outdoor unit operating conditions. Actually run the equipment in cooling or heating mode and check the operating condition. Cooling : Heating : Indoor unit LEV LEV (PUHY) SLEV Indoor unit LEV SLEV Refer to the item concerning judging LEV failure. Check with the ball valve fully open. Check the thermistor s resistance. Check the sensor s temperature reading by the LED monitor.

126 Checking code Meaning, detecting method Cause Checking method & Countermeasure 0 Suction pressure abnormality <PUHY-00 0YMF-C>. Judging the state when the suction pressure reaches near 0kg/ cm G (0MPa) during compressor operation by the low pressure saturation temperature, error stop will be commenced displaying 0.. The outdoor unit once stops entering into the -minutes restart mode if the state of continues for minutes, and restarts after minutes.. After restarting, if the same state as continues within 0 minutes from the stopping of, error stop will be commenced displaying 0.. Ineffective if the compressor operating time (integrated) exceeds 60-minutes not detecting trouble. <PUHY-P00 0YMF-C> <PURY-(P)00 0YMF-C>. Judging that the state when the suction pressure reaches 0kg/ cm G (0MPa) during compressor operation indicates high pressure by the discharge temperature and low pressure saturation temperature, the back-up control by gas bypassing will be conducted. Operation while neglecting to open ball valve. Especially for the ball valve at low pressure side. At cooling : Gas side ball valve At heating : Liquid side ball valve When plural systems are existing, the low pressure abruptly drop at indoor stopping by the erroneous wiring of transmission line (different connection of transmission line and refrigerant piping). Temporary vacuum condition due to refrigerant distribution unbalance (insufficient refrigerant of low pressure line) immediately after charging refrigerant. Once vacuum operation protection is commenced, do not attempt to restart until taking the measures below. <Checking method> Check ball valve for neglecting to open. Check extended piping for clogging when ball valve is opened. Check transmission line for erroneous wiring. (Confirm the correct wiring and piping connection between indoor and outdoor units by operating indoor unit one by one.) <Countermeasure> After checking with the above method, make error reset by power source reset. Then operate for 0~-minutes under the operation mode reverse to that when the vacuum operation protection occurred (Heating if error occurred in cooling, while cooling if it occurred in heating), and then enter into the ordinary operation state. 00 Leakage (water) abnormality When drain sensor detects flooding during drain pump OFF. ) Water leak due to humidifier or the like in trouble. Check water leaking of humidifier and clogging of drain pan. 0 Drain pump abnormality When indirect heater of drain sensor is turned on, rise in temperature is 0 deg. or less (in water) for 0 seconds, compared with the temperature detected before turning on the indirect heater. ) Drain sensor sinks in water because drain water level rises due to drain water lifting-up mechanism trouble. ) Broken wire of indirect heater of drain sensor. Check operations of drain pump. Measure resistance of indirect heater of drain sensor. (Normal: Approx. 8Ω between - of CN0) ) Detecting circuit (circuit board) trouble. Indoor board trouble if no other problems is detected. 0 Drain sensor abnormality Short/open is detected during drain pump operations. (Not detected when drain pump is not operating.) Short Open : 90 C or more detected : -0 C or less detected ) Thermistor trouble. ) Poor contact of connector. (insufficient insertion) ) Full-broken of half-broken thermistor wire. Check resistance of thermistor. 0 C : kω 0 C : 9.kΩ 0 C : 6.kΩ 0 C :.kω ) Indoor unit circuit board (detecting circuit) trouble. Check contact of connector. Indoor port trouble if no other problem is detected. Operation of float switch When float switch operates (point of contact : OFF), error stop is observed with code No. 0 displayed. ) Drain up input trouble. ) Poor contact of float switch circuit. ) Float switch trouble. Check drain pump operations. Check connect contact. Check float switch operations.

127 0 Checking code Meaning, detecting method Cause Checking method & Countermeasure Reverse phase abnormality Reverse phase (or open phase) in the power system is being detected, so operation cannot be started. ) The phases of the power supply (L, L, L) have been reversed. ) Open phase has occurred in the power supply (L, L, L, N). If there is reverse phase before the breaker, after the breaker or at the power supply terminal blocks TBA, reconnect the wiring. Check before the breaker, after the breaker or at the power supply terminal blocks TBA, and if there is an open phase, correct the connections. a) Check if a wire is disconnected. b) Check the voltage between each of the wires. ) The wiring is faulty. ) The fuse is faulty. ) T0 is faulty. 6) The circuit board is faulty. Check the connections,, the contact at the connector,, the tightening torque at screw tightening locations and for wiring disconnections. TBA~NF~TBB~CNTR~F~ T0~CNTR Refer to the circuit number and the wiring diagram plate. If F on the MAIN board, or F is melted, (Resistance between both ends of the fuse is ), replace the fuses. To judge failure of the T0, go to Individual Parts Failure Judgment Methods. If none of the items in ) to ) is applicable, and if the trouble reappears even after the power is switched on again, replace the MAIN board (when replacing the circuit board, be sure to connect all the connectors, etc. securely). Power supply sync signal abnormality The frequency cannot be determined when the power is switched on. (The power supply s frequency cannot be detected. The outdoor fan cannot be controlled by phase control.) ) There is an open phase in the power supply (L, L, L, N). ) The power supply voltage is distorted. Check before the breaker, after the breaker or at the power supply terminal blocks TBA, and if there is an open phase, correct the connections. If the power supply voltage waveform is distorted from a sine wave, improve the power supply environment. ) A fuse is defective. ) T0 is defective. ) The circuit board is defective. If F on the MAIN board, or F is melted, (Resistance between both ends of the fuse is ), replace the fuses. To judge failure of the T0, go to Individual Parts Failure Judgment Methods. If none of the items in ) to ) is applicable, and if the trouble reappears even after the power is switched on again, replace the MAIN board (when replacing the circuit board, be sure to connect all the connectors, ground wires, etc. securely). 6

128 Checking code Meaning, detecting method Cause Checking method & Countermeasure 6 00 Fan speed abnormality (motor abnoramlity) VDC sensor/circuit abnormality (Detects only for PKFY-VAM). Detecting fan speed below 80rpm or over 000rpm during fan operation at indoor unit (first detection) enters into the -minute restart prevention mode to stop fan for 0 seconds.. When detecting fan speed below 80rpm or over 000rpm again at fan returning after 0 seconsd from fan stopping, error stop (fan also stops) will be commenced displaying 6. If VDC 0 V is detected just before the inverter starts. If VDC 0 V is detected just before starting of and during operation of the inverter. ) Slipping off of fan speed detecting connector (CN) of indoor controller board. ) Slipping off of fan output connector (FAN) of indoor power board. ) Disconnection of fan speed detecting connector (CN) of indoor controller board, or that of fan output connector (FAN) of indoor power board. ) Filter cologging. ) Trouble of indoor fan motor. 6) Faulty fan speed detecting circuit of indoor controller board, or faulty fan output circuit of indoor power board. ) Power supply voltage is abnormal. ) The wiring is defective. ) The rush current prevention resistors (R, ) are defective. ) The electromagnetic contactor (C) is defective. ) The diode stack (DS) is defective. 6) The reactor (DCL) is defective. ) The INV board is defective. Confirm slipping off of connector (CN) on indoor controller board. Confirm slipping off of connector (FAN) on indoor power board. Check wiring for disconnection. Check filter. Check indoor fan motor. When aboves have no trouble. ) For trouble after operating fan. Replace indoor controller board. If not remedied, replace indoor power board. ) For trouble without operating fan. Replace indoor power board. Check if an instantaneous power failure or power failure, etc. has occurred. Check if the voltage is the rated voltage value. Check, the connections,, contact at the connectors, tightening torque at screw tightened portions,, wiring polarities,, for broken wires, and 6, for grounding in the following wiring. TBA~NF~TBB, TBB~DS~[C, R, R]~[C, C]~IPM Wiring CNDC (G / A) ~ CNVDC (INV) Wiring * Check if the wiring polarities are as shown on the wiring diagram plate. To judge failure of R and R, go to Individual Parts Failure Judgment Methods. To judge failure of the C, go to Individual Parts Failure Judgment Methods. To judge failure of the DS, go to Individual Parts Failure Judgment Methods. To judge failure of the DCL, go to Individual Parts Failure Judgment Methods. If none of the items in ) to 6) is applicable, and if the trouble reappears even after the power is switched on again, replace the INV board (when replacing the circuit board, be sure to connect all the connectors, ground wires, etc. securely).

129 Checking code Meaning, detecting method Cause Checking method & Countermeasure 0 Bus voltage abnormality If VDC 00 V is detected during inverter operation. ) The power supply voltage is abnormal. ) The wiring is defective. Check if an instantaneous stop or power failure, etc. has occurred. Check if the voltage is the rated voltage value. Check, the connections,, contact at the connectors, tightening torque at screw tightened portions,, wiring polarities,, for broken wires, and 6, for grounding in the following wiring. TBA~NF~TBB, TBB~DS~[C, R, R]~[C, C]~IPM Wiring CNDC (G / A) ~ CNVDC (INV) Wiring * Check if the wiring polarities are as shown on the wiring diagram plate. ) The rush current prevention resistors (R, ) are defective. ) The electromagnetic contactor (C) is defective. To judge failure of R and R, go to Individual Parts Failure Judgment Methods. To judge failure of the C, go to Individual Parts Failure Judgment Methods. ) The diode stack (DS) is defective. 6) The reactor (DCL) is defective. ) The inverter output is grounded. 8) The IPM is defective. 9) The circuit board is defective. To judge failure of the DS, go to Individual Parts Failure Judgment Methods. To judge failure of the DCL, go to Individual Parts Failure Judgment Methods. Check the wiring between the IPM and the compressor. Check the compressor s insulation resistance. Check the IPM. Judge that the IPM is fauly, (Go to Individual Parts Failure Judgment Methods. ) If none of the items in ) to 8) is applicable, and if the trouble reappears even after the power is switched on again, replace the circuit board by following procedure (when replacing the circuit board, be sure to connect all the connectors, ground wires, etc. securety) If the problem is solved after the G/A board only is replaced, then the G/A board is defective. If the problem is not solved, reinstall the G/A board and replace the INV board. If the problem is solved, the INV board is defective. If the problem is not solved by and above, replace both boards. 0 Radiator panel overheat protection If the cooling fan stays ON for minutes or longer during inverter operation, and if THHS 00 C is detected. ) The wiring is defective. ) The INV boar s fuse (F0) is defective. Check connections, contact at the connectors and for broken wires in the following wiring. MF~CNFAN If the fuse is defective, replace the fuse. ) The cooling fan (MF) is defective. ) The THHS sensor is defective. ) The air passage is clogged. 6) The IPM is defective. ) The circuit board is defective. To judge failure of the MF, go to Individual Parts Failure Judgment Methods. To judge failure of the THHS, go to error code 0. If the air passage of the heat sink is clogged, clear the air passage. Check the IPM. Judge that the IPM is fauly, (Go to Individual Parts Failure Judgment Methods. ) If none of the items in ) to 6) is applicable, and if the trouble reappears even after the power is switched on again, replace the circuit board by following procedure (when replacing the circuit board, be sure to connect all the connectors, ground wires, etc. securety) If the problem is solved after the G/A board only is replaced, then the G/A board is defective. If the problem is not solved, reinstall the G/A board and replace the INV board. If the problem is solved, the INV board is defective. If the problem is not solved by and above, replace both boards. 8

130 Checking code Meaning, detecting method Cause Checking method & Countermeasure 0 Over loard protection If IAC Arms is detected continuously for 0 minutes during operation of the inverter after or more seconds have passed since the inverter started. ) Air passage short cycle. ) The heat exchanger is clogged. ) Power supply voltage. Is the unit s exhaust short cycling? Clean the heat exchanger. If the power supply voltage is less than V, it is outside specifications. ) External air temperature. If the external air temperature is over C it is outside the specifications. ) Capacity setting error. Is the indoor unit capacity total correct? Are the outdoor/indoor unit capacity settings correct? 6) The solenoid valves (SV, ) are defective, or the solenoid valve drive circuit is defective. To judge failure of the solenoid valve, go to Individual Parts Failure Judgment Methods for the Solenoid Valve. ) The wiring is defective. Check connections, contact at the connectors and for broken wires in the following wiring. TBA~NF~TBB TBB~FANCON board~cn0 CNMF~MF TBB~CNTR CNFC~CNFC 0 IPM alarm output / Bus voltage abnormality If over current, overheat or undervoltage of drive cirduit is detected by IPM during inverter operation. [Inverter error detail : ] If VDC 00 or VDC 60V is detected during inverter operation. [Inverter error detail : ] If IAC 9Arms is detected during inverter operation. [Inverter error detail : ] 8) Fan motor (MF) operation is defective. 9) The inverter/compressor is defective. ) The power supply voltage is abnormal. ) The wiring is defective. ) The inverter / compressor is defective. Go to Treating Fan Motor Related Trouble. Go to Treating Inverter/Compressor Related Trouble. Check if an instantaneous stop or power failure, etc. has occurred. Check if the voltage is the rated voltage value. Check, the connections,, contact at the connectors, tightening torque at screw tightened portions,, wiring polarities,, for broken wires, and 6, for grounding in the following wiring. TBA~NF~TBB, TBA~DS~[C, R, R]~[C, C]~IPM Wiring CNDC (G / A) ~ CNVDC (INV) Wiring * Check if the wiring polarities are as shown on the wiring diagram plate. Go to Treatment of Inverter/Compressor Related Trouble. 9

131 Checking code Meaning, detecting method Cause Checking method & Countermeasure 60 Cooling fan abnormality If the heat sink temperature (THHS) 00 C for 0 minutes or longer just before the inverter starts. ) Same as 0. Same as Thermal sensor abnormality (Outdoor ) Discharge (TH) Low pressure saturation (TH) Detected switch liquid level (LD) Detected switch liquid level (LD) Heat exchanger inlet pipe (TH) Ambient temperature (TH6) Heat exchanger outlet pipe (TH) SC coil bypass outlet (TH8) <Other than THHS> A short in the thermistor or an open circuit was sensed. The outdoor unit switches to the temporary stop mode with restarting after minutes, then if the temperature detected by the thermistor just before restarting is in the normal range, restarting takes place. If a short or open circuit in the thermistor is detected just before restarting, error code 0, 0, 0, 0, 0, 06, 08, 09 or is displayed. In the minute restart mode, the abnormal stop delay LED is displayed. The above short or open circuit is not detected for 0 minutes after the compressor starts, or for minutes during defrosting or after recovery following defrosting. <THHS> If a heat sink (THHS) temperature of -0 C is detected just after the inverter starts or during inverter operation. ) Thermistor ) Lead wires are being pinched. ) Insulation is torn. ) A connector pin is missing, or there is faulty contact. ) A wire is disconnected. 6) The thermistor input circuit on the MAIN circuit board is faulty. (In the case of the THHS, replace the INV board.) Short Circuit Detection Check the thermistor s resistance. Check if the lead wires are pinched. Check for tearing of the insulation. Check if a pin is missing on the connector. Check if a wire is disconnected. Check the temperature picked up by the sensor using the LED monitor. If the deviation from the actual temperature is great, replace the MAIN circuit board. (In the case of the THHS, replace the INV board.) Open Circuit Detection TH 0 C or higher (0. kω ) C or lower ( kω ) TH 0 C or higher (. kω ) -0 C or lower (0 kω ) LD -0 C or lower (0 kω ) LD -0 C or lower (0 kω ) TH 0 C or higher (0. kω ) -0 C or lower (0 kω ) TH6 0 C or higher (0. kω ) -0 C or lower (0 kω ) TH 0 C or higher (. kω ) -0 C or lower (0 kω ) TH8 0 C or higher (. kω ) -0 C or lower (0 kω ) TH9 0 C or higher (. kω ) -0 C or lower (0 kω ) THHS -0 C or lower (. MΩ ) TH0 0 C or higher (0. kω ) - C or lower (66 kω ) 09 0 CS circuit (TH9) Radiator panel (TH HS) Compressor shell temperature (TH0) * TH, TH9, TH0 : P-YMF-B only Thermal sensor abnormality (BC controlled) Liquid inlet (TH) Bypass outlet (TH) Bypass inlet (TH) Intermediate section (TH6). When short (high temp. inlet) or open (low temperature inlet) of thermistor is detected during operation, error stop will be commenced displaying or, or, or or 6.. The above detectection is not made during defrostig and - minute after changing operation mode. ) Thermistor trouble. ) Biting of lead wire. ) Broken cover. ) Coming off of pin at connector portion, poor contact. ) Broken wire. 6) Faulty thermistor input circuit of control board. Short Detected Check thermistor resistance. Check lead wire biting. Check broken cover. Check coming off of pin at connector. Check broken wire. Check sensor sensing temperature. If it deviates from the actual temerature seriously, replace control panel. Open Detected TH 0 C or more (0. kω ) -0 C or less (0 kω ) TH 0 C or more (0. kω ) -0 C or less (0 kω ) TH 0 C or more (. kω ) -0 C or less (0 kω ) TH6 0 C or more (0. kω ) -0 C or less (0 kω ) 0

132 Checking code Meaning, detecting method Cause Checking method & Countermeasure 0 Pressure sensor abnormality (outdoor unit) When pressue sensor detects kg/cm G (0.098MPa) or less during operation, outdoor unit once stops with minutes restarting mode, and restarts if the detected pressure of pressure sensor exceeds kg/cm G (0.098MPa) imediately before restarting. If the detected pressure of sensor is less than kg/cm G (0.098MPa) immediately before restarting, error stop is commenced displaying 0. ) Pressutre sensor trouble. ) Inner pressure drop due to a leakage. ) Broken cover. ) Coming off of pin at connector portion, poor contact. ) Broken wire. 6) Faulty thermistor input circuit of MAIN board. See Troubleshooting of pressure sensor. Under minutes restarting mode, LED displays intermittent fault check. During minutes after compressor start, defrosting and minutes after defrosting operations, trouble detection is ignored Pressure sensor abnormality (BC controller) High pressure side Intermediate IAC sensor/ circuit abnormality When high or intermidiate pressure sensor detects kg/cm G (0.098MPa) or less immediately before starting, error stop is commenced displaying 0, or 0. If IAC Arms is detected just ) Contact is faulty. before the inverter starts, or If IAC Arms is detected during inverter operation after seconds has passed since the ) The current sensor (ACCT) is connected with wrong polarity. inverter started when the INV board s SW- is OFF. ) The wiring is defective [Inverter error detail : 6] If the current sensor (ACCT) miss-wiring is detected during inverter operation. [Inverter error detail : ] ) Pressure sensor trouble. ) Inner pressure drop due to gas leak. ) Broken cover. ) Coming off of pin at connector portion, poor contact. ) Broken wire. 6) Faulty pressure sensor input circuit of control board. See troubleshooting of pressure sensor. Check the contacts of CNACCT on the INV board. Check the ACCT_U, W polarity with below drawing. Check. connections.. contact at the connectors.. for broken wires in the following wiring. CNDR-CNDR CNV-CNV IPM-MC ) The Ac current sensor (ACCT) is defective. ) The IPM is defective. To judgefailure of ACCT, go to individual Parts Failure Judgment Methods. Check the IPM. Judge that the IPM is fauly, (Go to Individual Parts Failure Judgment Methods. ) ACCT_U ACCT_W Compressor-input phase U U IPM-output phase U Red wire Compressor-input phase W W IPM-output phase W Black wire

133 Checking code Meaning, detecting method Cause Checking method & Countermeasure 0 IAC sensor/ circuit abnormality If IAC Arms is detected just 6) The circuit board is defective. before the inverter starts, or If IAC Arms is detected during inverter operation after seconds has passed since the inverter started when the INV board s SW- is OFF. [Inverter error detail : 6] If the current sensor (ACCT) miss-wiring is detected during inverter operation. [Inverter error detail : ] If none of the items in ) to ) is applicable, and if the trouble reappears even after the power is switched on again, replace the circuit board by following procedure (when replacing the circuit board, be sure to connect all the connectors, ground wires, etc. securety) If the problem is solved after the G/A board only is replaced, then the G/A board is defective. If the problem is not solved, reinstall the INV board and replace the INV board. If the problem is solved, the INV board is defective. If the problem is not solved by and above, replace both boards. 0 Different indoor model connected abnormality An exclusive R refrigerant indoor unit was connected to a R0C refrigerant outdoor unit. ) An error was made in the MAIN board of the outdoor unit (replaced with the wrong circuit board). ) An error was made in selecting the indoor unit (installation error). ) An error was made in the indoor unit s circuit board (replaced with the wrong circuit board). If the model name plate on the outdoor unit says that it is an exclusive R model, and if error 0 has occurred, the MAIN board for the outdoor unit is a R0C model circuit board, so replace it with the MAIN board for the R model. If the model name plate for the indoor unit is an exclusive R model, install a unit which can also operate with R0C. If the model name plate on the indoro unit indicates that it is also capable of operating with R0C, and error 0 occurs, the indoor unit s circuit board is for an exclusive R model, so replace it with the circuit board for a unit which is also capable of using R0C.

134 () Communication/system Checking code 6600 Meaning, detecting method Cause Checking method & Countermeasure Multiple address error Transmission from units with the same address is detected. Note: The address/attribute shown on remote controller indicates the controller which has detected error. ) Two or more controllers of outdoor unit, indoor unit, remote controller, BC controller, etc. have the same address. ) In the case that signal has changed due to noise entered into the transmission signal. At the genration of 6600 error, release the error by remote controller (with stop key) and start again. a) If the error occures again within minutes. Search for the unit which has the same address with that of the source of the trouble. When the same address is found, turn off the power source of outdoor unit, BC controller, and indoor unit for minutes or more after modifying the address, and then turn on it again. b) When no trouble is generated even continuing operation over minutes. The transmission wave shape/noise on the transmission line should be investigated in accordance with <Investigation method of transmission wave shape/noise>. 660 Transmission processor hardware error Though transmission processor intends to transmit 0, is displayed on transmission line. Note: The address/attribute shown on remote controller indicates the controller which has detected error. ) At the collision of mutual transmission data generated during the wiring work or polarity change of the transmission line of indoor or outdoor unit while turning the power source on, the wave shape is changed and the error is detected. ) 00V power source connection to indoor unit or BC controller. ) Ground fault of transmission line. ) Insertion of power supply connector (CN0) of plural outdoor units at the grouping of plural refrigerant systems. ) Insertion of power supply connector (CN0) of plural outdoor units in the connection system with MELANS. 6) Faulty controller of unit in trouble. ) Change of transmission data due to the noise in transmission. 8) Connection system with plural refrigerant systems or MELANS for which voltage is not applied on the transmission line for central control.

135 Checking code Meaning, detecting method Cause Checking method & Countermeasure 660 Transmission processor hardware error Checking method and processing Transmission line installed while turning power source on? NO Check power source of indoor unit. YES Shut off the power source of outdoor/indoor units/bc controller and make it again. 0V ~ 0V? YES Check transmission line work and shield finish Ground fault or shield contacted with transmission line? NO System composition? NO YES Erroneous power source work Erroneous transmission work Single refrigerant system Plural refrigerant system MELANS connected system Confirm supply power connector CN0 of outdoor unit Confirm supply power connector CN0 of outdoor unit YES Only set with CN0 inserted? Modification of CN0 insertion method. NO CN0 inserted? YES Replace insertion of CN0 to CN Investigation of transmission line noise * For the investigation method, follow <Investigation method of transmission wave shape/noise> Noise exist? NO Faulty controller of generating unit YES Investigation of the cause of noise Modification of faulty point 660 Transmission circuit bus-busy error Collision of data transmission: Transmission can not be performed for ~0 consecutive minutes due to collision of data transmission. Data can not be transmitted on transmission line due to noise for ~0 consecutive minutes. ) As the voltage of short frequency like noise is mixed in transmission line continuously, transmission processor can not transmit. ) Faulty controller of generating unit. a) Check transmission wave shape/noise on transmission line by following <Investigation method of transmission wave shape/noise>. No noise indicates faulty controller of generating unit. Noise if existed, check the noise. Note: The address/attribute shown on remote controller indicates the controller which has detected error.

136 Checking code 6606 Meaning, detecting method Cause Checking method & Countermeasure Communications with transmission processor error Communication trouble between apparatus processor and transmission processor. Note: The address/attribute shown on remote controller indicates the controller which has detected error. ) Data is not properly transmitted due to casual errouneous operation of the generating controller. ) Faulty generating controller. Turn off power sources of indoor unit, BC controller and outdoor unit. When power sources are turned off separately, microcomputer is not reset and normal operations can not be restored. Controller trouble is the source of the trouble when the same trouble is observed again.

137 Checking code 660 No ACK error Meaning, detecting method When no ACK signal is detected in 6 continuous times with 0 second interval by transmission side controller, the transmission side detects error. Note: The address/attribute shown on remote controller indicates the controller not providing the answer (ACK). System Generating Display of composition unit address trouble Detecting method Cause Checking method & countermeasure Outdoor unit (OC) Remote controller (RC) No reply (ACK) at BC transmission to OC ) Poor contact of transmission line of OC or BC. ) Damping of transmission line voltage/signal by acceptable range of transmission wiring exceeded. Farthest : Less than 00m Remote controller wiring : Less than 0m Shut down OC unit power source, and make it again. It will return to normal state at an accidental case. When normal state can not be re-covered, check for the ) ~ ) of the cause. ) Erroneous sizing of transmission line (Not within the range below). Wire diameter :.mm or more ) Faulty control circuit board of OC. () Single refrigerant system BC controller (BC) Indoor unit (IC) Remote controller (RC) Remote controller (RC) No reply (ACK) at IC transmission to BC No reply (ACK) at RC transmission to IC ) When Fresh Master address is changed or modified during operation. ) Faulty or slipping off of transmission wiring of BC controller. ) Slipping off of BC unit connector (CN0). ) Faulty BC controller circuit board. ) When IC unit address is changed or modified during operation. ) Faulty or slipping off of transmission wiring of IC. ) Slipping off of IC unit connector (CNM). ) Faulty IC unit controller. ) Faulty remote controller. Shut down both OC and BC power sources simultaneously for minutes or more, and make them again. It will return to normal state at an accidental case. When normal state can not be re-covered, check for the ) ~ ) of the cause. Shut down both OC and BC power sources simultaneously for minutes or more, and make them again. It will return to normal state at an accidental case. When normal state can not be re-covered, check for the ) ~ ) of the cause. Remote controller (RC) Remote controller (RC) No reply (ACK) at IC transmission to RC ) Faulty transmission wiring at IC unit side. ) Faulty transmission wiring of RC. ) When remote controller address is changed or modified during operation. ) Faulty remote controller. Shut down OC power sources for minutes or more, and make it again. It will return to normal state at an accidental case. When normal state can not be re-covered, check for the ) ~ ) of the cause. 6

138 Checking code 660 No ACK error (continued) Meaning, detecting method When no ACK signal is detected in 6 continuous times with 0 second interval by transmission side controller, the transmission side detects error. Note: The address/attribute shown on remote controller indicates the controller not providing the answer (ACK). System Generating Display of composition unit address trouble Detecting method Cause Checking method & countermeasure Outdoor unit (OC) Remote controller (RC) No reply (ACK) at BC transmission to OC As same that for single refrigerant system. Same as measure for single refrigerant system. BC controller (BC) Remote controller (RC) No replay (ACK) at IC transmission to BC As same that for single refrigerant system. Same as measure for single refrigerant system. () Group operation system using plural refrigerants Indoor unit (IC) Remote controller (RC) Remote controller (RC) Remote controller (RC) No reply (ACK) at RC transmission to IC No reply (ACK) at IC transmission to RC ) Cause of ) ~ ) of Cause for single refrigerant system. ) Slipping off or short circuit of transmission line of OC terminal block for centralized control (TB). ) Shut down of OC unit power source of one re-frigerant system. ) Neglecting insertion of OC unit power supply connector (CN0). ) Inserting more than sets of power supply connector (CN0) for centralized control use. For generation after normal operation conducted once, the following causes can be considered. Total capacity error (00) Capacity code setting error (0) Connecting set number error (0) Address setting error (0) ) Cause of ) ~ ) of Cause for single refrigerant system. ) Slipping off or short circuit of transmission line of OC terminal block for centralized con-trol (TB). ) Shut down of OC unit power source of one refrigerant system. ) Neglecting insertion of OC unit power supply connector (CN0). ) Inserting more than sets of power supply connector(cn0) for centralized control use. At generation after normal operation conducted once, the following causes can be considered. Total capacity error (00) Capacity code setting error (0) Connecting set number error (0) Address setting error (0) a) Shut down the power source of both IC and OC for over minutes simultaneously, and make them again. Normal state will be returned incase of accidental trouble. b) Check for ) ~ ) of causes. If cause is found, remedy it. c) Check other remote controller or OC unit LED for troubleshooting for trouble. Trouble Modify the trouble according to the content of check code. No trouble Faulty indoor controller a) Shut down the power source of OC for over minute, and make it again. Normal state will be returned in case of accidental trouble. b) Check for ) ~ ) of causes. If cause is found, remedy it. When normal state can not be obtained, check ) ~ ) of causes.

139 Checking code 660 No ACK error (continued) Meaning, detecting method When no ACK signal is detected in 6 continuous times with 0 second interval by transmission side controller, the transmission side detects error. Note: The address/attribute shown on remote controller indicates the controller not providing the answer (ACK). System Generating Display of composition unit address trouble Detecting method Cause Checking method & countermeasure Outdoor unit (OC) BC controller (BC) Remote controller (RC) Remote controller (RC) No reply (ACK) at BC transmission to OC No reply (ACK) at RC transmission to IC As same that for single refrigerant system. Same cause of that for grouping from plural refrigerants. Same countermeasure as that for single refrigerant system. Same countermeasure as that for IC unit error in plural refrigerant system. () Connecting system with system controller (MELANS) Indoor unit (IC) Remote controller (RC) Remote controller (RC) Remote controller (RC) No reply (ACK) at transmission of SC to IC No reply (ACK) at transmission of IC to RC No reply (ACK) at transmission of MELANS to RC Trouble of partial IC units: ) Same cause as that for single refrigerant system. Trouble of all IC in one refrigerant system: ) Cause of total capacity error. (00) ) Cause of capacity code setting error. (0) ) Cause of connecting number error. (0) ) Cause of address setting error. (0) ) Slipping off or short circuit of transmission line of OC unit terminal block for central control (TB). 6) Power source shut down of OC unit. ) Trouble of OC unit electrical system. Trouble of all IC: ) As same that for single refrigerant system. ) Insertion of power supply connector (CN0) into OC unit transmission line for centralized control. ) Slipping off or power source shut down of power supply unit for transmission line. ) Faulty system controller (MELANS). Same cause as that for plural refrigerant system. Trouble of partial IC units: ) Same cause of that for single refrigerant system. Trouble of all IC in one refrigerant system: ) Error detected by OC unit. Total capacity error. (00) Capacity code setting error. (0) Connecting number error. (0) Address setting error. (0) ) Slipping off or short circuit of transmission line of OC unit terminal block for central control (TB). ) Power source shut down of OC unit. ) Trouble of OC unit electrical system. Same countermeasure as that for single refrigerant system. Confirm OC trouble diagnosis LED. At trouble generation, check for the content according to check code. Check the content of )~) shown left. Confirm voltage of transmission line for centralized control. More than 0V Confirm ) ) left. Less than 0V Confirm ) left. Same countermeasure as that for plural refrigerant system. Same countermeasure as that for single refrigerant system. Confirm OC trouble diagnosis LED. At trouble generation, check for the content according to check code. Check the content of )~) shown left. Trouble of all IC: ) As same that for single refrigerant system. ) Insertion of power supply connector (CN0) into OC unit transmission line for central-ized control. ) Slipping off or power shutdown of power supply unit for transmission line. ) Faulty MELANS. Check the causes of ) ~ ) left. 8

140 Checking code 660 No ACK error (continued) Meaning, detecting method When no ACK signal is detected in 6 continuous times with 0 second interval by transmission side controller, the transmission side detects error. Note: The address/attribute shown on remote controller indicates the controller not providing the answer (ACK). System Generating Display of composition unit address trouble Detecting method Cause Checking method & countermeasure () Connecting system with system controller (MELANS) System controller (SC) Remote controller (RC) No reply (ACK) at transmission of IC to SC Trouble of partial remote controller: ) Faulty wiring of RC transmission line. ) Slipping off or poor contact of RC transmission connector. ) Faulty RC. Trouble of all IC in one refrigerant system. ) Error detected by OC unit. Total capacity error (00) Capacity code setting error (0) Connecting number error (0) Address setting error (0) ) Slipping off or short circuit of transmission line of OC unit terminal block for central control (TB). ) Power source shut down of OC unit. ) Trouble of OC unit electrical system. Trouble of all RC: ) As same that for single refrigerant system. ) Inserting supply power connector (CN0) to OC transmission line for centralized control. ) Slipping off or power shutdown of power supply unit for transmission line. ) Faulty MELANS. Check ) ~ ) left. Confirm OC trouble diagnosis LED. At trouble generation, check for the content according to check code. Check the content of ) ~ ) shown left. Check the causes )~) left. No relation with system Address which should not be existed - - ) IC unit is keeping the memory of the original group setting with RC although the RC address was changed later. The same symptom will appear for the registration with SC. ) IC unit is keeping the memory of the original interlocking registration with Fresh Master with RC although the Fresh Master address was changed later. As some IC units are keeping the memory of the address not existing, delete the information. Employ one of the deleting method among two below. ) Deletion by remote controller. Delete unnecessary information by the manual setting function of remote controller. ) Deletion by connecting information deleting switch of OC unit. Be careful that the use of this method will delete all the group information set with RC and all the interlocking information of Fresh Master and IC unit. Shut down OC unit power source, and wait for minutes. Turn on the dip switch SW- provided on OC unit control circuit board. Make OC unit power source, and wait for minutes. Shut down OC unit power source, and wait for minutes. Turn off the dip switch SW- provided on OC unit control circuit board. 6 Make OC unit power source. 9

141 Checking code 6608 Meaning, detecting method Cause Checking method & Countermeasure No response error Though acknowledgement of receipt (ACK) is received after transmission, no response command is returned. Detected as error by transmission side when the same symptom is re-peated 0 times with an interval of seconds. Note: The address/attribute shown on remote controller indicates the controller which has detected error. ) At the collision of mutual transmission data when transmission wiring is modified or the polarity is changed while turning the power source on, the wave shape changes detecting error. ) Repeating of transmission error due to noise. ) Damping of transmission line voltage/signal due to exceeding of the acceptable range for transmission wiring. Farthest Less than 00m RC wiring Less than m ) Damping of transmission voltage/ signal due to improper type of transmission line. Wire size : More than.mm a) Generation at test run. Turn off the power sources of OC unit, IC unit and Fresh Master for more than minutes simultaneously, and make them again. Returning to normal state means the trouble detection due to transmission line work while powering. b) Check ) and ) of the causes left. c) Investigate the transmission wave shape/noise on transmission line according to <Investigation method of transmission wave shape/noise>. Much possibility if 660 is generated. () System error Checking code Meaning, detecting method Cause Checking method & Countermeasure 00 Total capacity error Total capacity of indoor units in the same refrigerant system exceeds limitations. Trouble source: Outdoor unit ) Total capacity of indoor units in the same refrigerant system exceeds the following: Model Total capacity Total capacity code PURY-(P) PURY-(P)0 8 8 PU(H)Y-(P)00 60 PU(H)Y-(P)0 6 a) Check for the model total (capacity cord total) of indoor units connected. b) Check whether indoor unit capacity code (SW) is wrongly set. For erroneous switch setting, modify it, turn off power source of outdoor unit, and indoor unit simultaneously for minutes or more to modify the switch for setting the model name (capacity coad). ) Erroneous setting of OC model selector switch (SW-0). Check for the model selector switch (Dip switches SW-0 on outdoor unit control circuit) of OC. 0 0 Capacity code error Error display at erroneous connection of Indoor unit of which model name can not be connected. Trouble source : Outdoor unit Indoor unit Connected unit count over Number of units connected in the same refrigerant system exceeds limitations. Trouble source: Outdoor unit ON... 0 OFF SW ) The Indoor unit model name (model code) connected is not connectable. Connectable range...0~0 ) Erroneous setting of the switch (SW) for setting of model name of Indoor unit connected. ) Number of unit connected to terminal block (TB) for outdoor/indoor transmission line exceeds limitations given be-lows: Item Limitation Total of ~ (PUHY-00) Indoor unit ~6 (PUHY-0) ~ (PURY-00) ~6 (PURY-0) Total of Indoor unit & RC ~ Total of BC controller a) Check for the model name of the Indoor unit connected. b) Check for the switch (SW if indoor controller for setting of Indoor unit model name of generating address. When it is not agreed to the model name, modify the capacity code while shutting off the power source of Indoor unit. * The capacity of Indoor unit can be confirmed by the self-diagnosios function (SW operation) of Indoor unit. a) Check whether the connection of units to the terminal block for indoor/outdoor transmission wiring (TB) of outdoor unit is not exceeding the limitation. (See ~ left.) b) Check for ), ), and ). c) Check for the connection of transmission wiring to the terminal block for centralized control is erroneously connected to the indoor/outdoor transmission wiring terminal block (TB). 0

142 Checking code Meaning, detecting method Cause Checking method & Countermeasure 0 Connected unit count over ) The Outdoor unit address is being set to ~00 under automatic address mode (Remote controller displays HO ). ) Slipping off of transmission wiring at Outdoor unit. ) Short circuit of transmission line in case of ) & ), remote controller displays HO. a) Check for the model total (capacity code total) of indoor units connected. 0 Address setting error Erroneous setting of OC unit address Erroneous setting of BC controller address Trouble source : Outdoor unit BC controller ) Setting error of Outdoor unit address. The address of Outdoor unit is not being set to ~00. ) The address of BC controller is not being set within ~00. Check that the address of OC unit is being set to ~00. Reset the address if it stays out of the range, while shutting the power source off. When BC controller is out of the range, reset it while shutting the power source of both OC unit and BC controller off. 0 Connection No. setting error Can not operate because connection No. of indoor unit wrongly set. Trouble source : BC controller Remote control sensor error Error not providing the temperature designed to remote controller sensor. Trouble source : Indoor unit ) Indoor unit capacity per connector joint is exceeded as follows: Single connection : 8 or more Two connection joint : 6 or more Three connection joint : or more Four connection joint : or more ) Four or more indoor units are set for the same connection. ) The smallest connection No. has not been set when used at joint. ) In case when the old type remote controller for M-NET is used and the remote controller sensor is designed on indoor unit. (SW- turned ON) a) Check indoor unit connection No. in refrigerant circuit. No four or more indoor units which are set for the same connection No. A? Check total capacity of indoor units which are set for the same connections No. Judged as trouble when it applies to Cause ). Check whether the smallest connection No. is set when used at joint. b) Check whether indoor unit capacity code (SW) is wrongly set. (Keep factory shipment condition.) For erroneous switch setting, modify it, turn off the power source of outdoor unit, and indoor unit simultaneously for minutes or more, and then turn on. a) Replace the old remote controller by the new remote controller. 0 Different Indoor model and BC controller connected error A indoor unit not for the R0C (model: P ) is connected. Use the P indoor unit.

143 [] LED Monitor Display () How to read LED for service monitor By setting of DIP SW- ~ -8, the unit operating condition can be observed with the service LED on the control circuit board. (For the relation of each DIP SW to the content, see the table provided.) As shown in the figure below, the LED consist of segments is put in sets side by side for numerical and graphic display. OC : Outdoor unit SV : Solenoid valve THHS : Inverter radiator panel IC : Indoor unit LEV : Electronic expansion valve COMP : Compressor SW : Outdoor unit control circuit board E : Memory storage for service activities (sampling per minute) seg LED The numerical display includes that of pressure, temperature or the like, while the graphic display includes that of operating condition, solenoid valve ON/OFF state or the like. Numerical display Example : display at 8.8kg/cm G (.8MPa) of pressure sensor data (Item No. 6) Graphic display (Two LEDs aligned vertically express a flag.) Example : At forcible powering in outdoor unit operation display

144 PU(H)Y-(P)00 0YMF-C E: E Contents stored in the EPROM; M: Monitored by the IC through communications; E*: Stored in service memory. No SW Item Display Remarks 6890 LD LD LD LD LD LD6 LD LD Relay Output Display (Lights up to display) Check Display OC Error COMP Operating Crankcase Heater ON S SV SV SV note 0 ~ 9999 Address and error code reversed SV Lights for Normal Operation LD8 is a relay output indicator which lights up at all times when the microcomputer s power is ON. When sending of a monitoring request to IC/BC is terminated, if there is no error, is displayed. E* Relay Output Display E* Check Display (Including the IC) 0 ~ 9999 Address and error code reversed If there is no error, is displayed. E* External Signal (Signal being input) demand Auto changeover mode (cooling) Auto changeover mode (heating) night mode. E* Outdoor Operation Display Warmup mode minutes, restart protection mode Compressor operating Preliminary Error Error E* Indoor Check No. No. 9 No. No. 0 No. No. No. No. No. No. No. 6 No. No. No. No. 8 No. 6 Lights up if an abnormal stop has occurred in the IC. The indicator for No. goes off when error reset is carried out from the smallest address. M Indoor Operation Mode No. No. 9 No. No. 0 No. No. No. No. No. No. No. 6 No. No. No. No. 8 No. 6 Lights up during cooling. Blinks during heating. Goes off during stop and blower operation. M Indoor Thermostat ON No. No. 9 No. No. 0 No. No. No. No. No. No. No. 6 No. No. No. No. 8 No. 6 Lights up when thermostat is ON. Goes off when thermostat is OFF. M Outdoor Operation Mode Permissible Stop Standby Defrost Cooling Heating E* Outdoor Control Mode Cooling Refrigerant Recovery Heating Refrigerant Recovery Cooling High Oil Recovery Cooling Low Oil Recovery Heating High Oil Recovery Heating Low Oil Recovery Preliminary Error in Outdoor High Pressure Error, Suction pressur Error Low Pressure Error, Configuration Detection Error Discharge Error Comp. temperature Error Overcurrent Protection Reverse Phase, Open Phase Error Heat Sink Thermostat Operating Overcurrent Break INV Error Overcharged Refrigerant The flag corresponding to the item where there is an error delay lights up. E* TH Error TH Error LD Error LD Error TH Error TH6 Error HPS Error THHS Error TH Error TH8 Error TH9 Error TH0 Error LPS Error note : only PUHY-P

145 for PU(H)Y-(P)00 0YMF-C No SW Item Display Remarks 6890 LD LD LD LD LD LD6 LD LD Outdoor Preliminary Error History High Pressure Error, Suction pressure Error TH Error Low Pressure Error Configuration Detection Error TH Error Outlet Error Comp. temperature Error LD Error Overcurrent Protection Reverse Phase, Open Phase Error LD Error Heat Sink Thermostat Operation TH Error Overcurrent Break TH6 Error HPS Error Overcharged Refrigerant THHS Error Lights up if an error delay has occurred between the time the power was turned on and the present time. To turn the indicators off, switch the power OFF briefly. E* TH Error TH8 Error TH9 Error TH0 Error LPS Error Error History 0 ~ 9999 The error and error delay code are displayed. If the address and error code are shown in reverse, or there is no error, is displayed. E Inverter Error Detail Inverter Error Detail ( ~ ) If there is no error, is displayed. E Error History 0 ~ 9999 E Inverter Error Detail Inverter Error Detail ( ~ ) Error History 0 ~ Inverter Error Detail Inverter Error Detail ( ~ ) Error History 0 ~ Inverter Error Detail Inverter Error Detail ( ~ ) Error History 0 ~ Inverter Error Detail Inverter Error Detail ( ~ ) Error History 6 0 ~ Inverter Error Detail Inverter Error Detail ( ~ ) Error History 0 ~ Inverter Error Detail Inverter Error Detail ( ~ ) Error History 8 0 ~ Inverter Error Detail Inverter Error Detail ( ~ ) Error History 9 0 ~ Inverter Error Detail Inverter Error Detail ( ~ ) Error History 0 0 ~ Inverter Error Detail Inverter Error Detail ( ~ ) Type of Inverter Preliminary Error (Details of the inverter error in No. ) 0 ~ 9999 If there is no error, is always overwritten. E* TH Data ~ E* TH Data LD Data LD Data 0 : OFF : ON : OPEN 0 : OFF : ON : OPEN No. THHS data are monitored by the inverter microcomputer TH Data ~ TH6 Data

146 for PU(H)Y-(P)00 0YMF-C No SW Item Display Remarks 6890 LD LD LD LD LD LD6 LD LD THHS Data ~ E* HPS Data TH Data TH8 Data TH9 Data TH0 Data LPS Data α 0C 0 ~ α 0C* Accumulator Level α 0C* and below are displayed alternately at every seconds. Accumulator Level: 0~9 ( AL= is also displayed), α 0C*: 0~ HzAK Increase/ Decrease Hz Hz 0 Hz + AK AK 0 AK Difference from Target Tc (Tcm-Tc) Low - deg. or lower Low - ~ - deg. Low - ~ - deg. Stable Region High ~ deg. High ~ deg. High deg or higher Difference from Target Te (Tem-Te) Low - deg. or lower Low - ~ - deg. Low - ~ - deg. Stable Region High ~ deg. High ~ deg. High deg or higher Tc ~ Te Tcm Tem Compressor Frequency 0 ~ 9999 Control Frequency E* INV Output Frequency Frequency actually output from the inverter. E* AK E* SLEV LEV FANCON Output Value (Toff%) Displays the FANCON output value used for control. E* INV Output current (IAC) ~ (M) Monitored by the inverter s microcomputer C Address 0 ~ IC Address/ Capacity Code 0 ~ 99 0 ~ 99 E IC Address/ Capacity Code IC Address/ Capacity Code IC Address/ Capacity Code On the left (LD~LD), the IC address, and on the right (LD~LD8), the capacity code is displayed (displayed alternately every minute) IC Address/ Capacity Code IC6 Address/ Capacity Code

147 for PU(H)Y-(P)00 0YMF-C When there is an error stop with No9-,the data on error stops or the data immediately before the error postponement stop, which is stored in service memory, are displayed. No SW Item Display Remarks 6890 LD LD LD LD LD LD6 LD LD IC Address/ Capacity Code 0 ~ 99 0 ~ 99 E IC8 Address/ Capacity Code IC9 Address/ Capacity Code IC0 Address/ Capacity Code 0 ~ 9999 On the left (LD~LD), the IC address, and on the right (LD~LD8), the capacity code is displayed (displayed alternately every minute) IC Address/ Capacity Code IC Address/ Capacity Code IC Address/ Capacity Code IC Address/ Capacity Code IC Address/ Capacity Code IC6 Address/ Capacity Code COMP Operation Time, Higher order digits 0 ~ 9999 E* Lower order digits Outdoor Operation\Mode Permissible Stop Standby Defrost Cooling Heating E Outdoor Control Mode Cooling Refrigerant Recovery Heating Refrigerant Recovery Cooling High Oil Recovery Cooling Heating Heating Low Oil High Oil Low Oil Recovery Recovery Recovery Relay Output Display Lighting Display COMP Operating Crankcase Heater ON S SV SV TH Data ~ TH Data LD Data LD Data TH Data TH6 Data HPS Data THHS Data 0 : OFF : ON : OPEN 0 : OFF : ON : OPEN ~ TH Data TH8 Data TH9 Data TH0 Data LPS Data α 0C 0 ~

148 for PU(H)Y-(P)00 0YMF-C When there is an error stop with No9-,the data on error stops or the data immediately before the error postponement stop, which is stored in service memory, are displayed. No SW Item Display Remarks 6890 LD LD LD LD LD LD6 LD LD α 0C* 0 ~ E Tc ~ Te Configuration Correction Value INV Output Frequency 0 ~ AK SLEV LEV DC Trunk Line Current ~ Outdoor Operation Indicator Warmup mode -minute Restart Protection mode Compressor Operating Preliminary Error Error Elapsed Time for CS Circuit Closed Detection IC room IC room IC room IC room IC room IC6 room IC room IC8 room IC9 room IC0 room IC room IC room 0 ~ ~ Above 9999, 9999 is displayed. M

149 for PU(H)Y-(P)00 0YMF-C No SW Item Display Remarks 6890 LD LD LD LD LD LD6 LD LD IC room IC room IC room IC6 room IC Liquid Pipe IC Liquid Pipe IC Liquid Pipe IC Liquid Pipe IC Liquid Pipe IC6 Liquid Pipe IC Liquid Pipe IC8 Liquid Pipe IC9 Liquid Pipe IC0 Liquid Pipe IC Liquid Pipe IC Liquid Pipe IC Liquid Pipe IC Liquid Pipe IC Liquid Pipe IC6 Liquid Pipe IC Gas Pipe IC Gas Pipe IC Gas Pipe IC Gas Pipe IC Gas Pipe IC6 Gas Pipe ~ M M 8

150 for PU(H)Y-(P)00 0YMF-C No SW Item Display Remarks 6890 LD LD LD LD LD LD6 LD LD IC Gas Pipe IC8 Gas Pipe IC9 Gas Pipe IC0 Gas Pipe IC Gas Pipe IC Gas Pipe IC Gas Pipe IC Gas Pipe IC Gas Pipe IC6 Gas Pipe ~ M IC SH M IC SH IC SH IC SH IC SH IC6 SH IC SH IC8 SH IC9 SH IC0 SH IC SH IC SH IC SH IC SH IC SH IC6 SH IC SC M IC SC IC SC IC SC IC SC IC6 SC IC SC IC8 SC 9

151 for PU(H)Y-(P)00 0YMF-C No SW Item Display Remarks 6890 LD LD LD LD LD LD6 LD LD IC9 SC ~ M IC0 SC IC SC IC SC IC SC IC SC IC SC IC6 SC IC LEV Opening pulse IC LEV Opening pulse IC LEV Opening pulse IC LEV Opening pulse IC LEV Opening pulse IC6 LEV Opening pulse IC LEV Opening pulse IC8 LEV Opening pulse IC9 LEV Opening pulse IC0 LEV Opening pulse IC LEV Opening pulse IC LEV Opening pulse IC LEV Opening pulse IC LEV Opening pulse IC LEV Opening pulse IC6 LEV Opening pulse IC Operation Mode IC Operation Mode IC Operation Mode IC Operation Mode IC Operation Mode 0 ~ : Stop : Fan : Cooling : Heating : Dry M M 0

152 for PU(H)Y-(P)00 0YMF-C No SW Item Display Remarks 6890 LD LD LD LD LD LD6 LD LD IC6 Operation Mode M IC Operation Mode IC8 Operation Mode IC9 Operation Mode IC0 Operation Mode IC Operation Mode 0: Stop : Fan : Cooling : Heating : Dry IC Operation Mode IC Operation Mode IC Operation Mode IC Operation Mode IC6 Operation Mode IC Filter 0 ~ 9999 M IC Filter IC Filter 0000 IC Filter IC Filter 0000 IC6 Filter IC Filter 000 IC8 Filter IC9 Filter IC0 Filter IC Filter 000 IC Filter 0000 IC Filter 000 IC Filter 000 IC Filter 00 IC6 Filter

153 PURY-(P)00 0YMF-C E: E Contents stored in the EPROM; M: Monitored by the IC through communications; E*: Stored in service memory. No SW Item Display Remarks 6890 LD LD LD LD LD LD6 LD LD Relay Output Display (Lights up to display) Check Display OC Error COMP Operating Crankcase Heater ON S SV SV SV 0 ~ 9999 Address and error code reversed SV Lights for Normal Operation LD8 is a relay output indicator which lights u at all times when the microcomputer s power is ON. When sending of a monitoring request to IC/BC is terminated, if there is no error, is displayed. E* Relay Output Display SV SV6 E* Check Display (Including the IC) 0 ~ 9999 Address and error code reversed If there is no error, is displayed. E* Communication Demand capacity 0 ~ 9999 If no demand control, displayed. {%} E* External Signal (Signal being input) Demand night mode. E* Outdoor Operation Display BC operating command Warmup mode minutes restart protection mode Compressor operating Preliminary Error Error E* Indoor Check No. No. 9 No. No. 0 No. No. No. No. No. No. No. 6 No. No. No. No. 8 No. 6 Lights up if an abnormal stop has occurred in the IC. The indicator for No. goes off when error reset is carried out from the smallest address. M Indoor Operation Mode No. No. 9 No. No. 0 No. No. No. No. No. No. No. 6 No. No. No. No. 8 No. 6 Lights up during cooling. Blinks during heating. Goes off during stop and blower operation. M Indoor Thermostat ON No. No. 9 No. No. 0 No. No. No. No. No. No. No. 6 No. No. No. No. 8 No. 6 Lights up when thermostat is ON. Goes off when thermostat is OFF. M BC All Indoor Mode Cooling-only ON Cooling-only OFF Heating-only ON Heating-only OFF Mixed ON Mixed OFF Fan OFF E* Outdoor Operation Mode Permissible Stop Standby Defrost Coolingonly Coolingmain Heatingonly Heatingmain Outdoor Control Mode Coolingonly Refrigerant Recovery Coolingmain Refrigerant Recovery Heatingonly Refrigerant Recovery Heating main Refrigerant Recovery Coolingonly Oil Recovery Coolingmain Oil Recovery Heatingonly Oil Recovery Heatingmain Oil Recovery Preliminary Error in Outdoor High Pressure Error, Suction pressure Error Low Pressure Error, Configuration Detection Error Discharge Error Comp. temperature Error Overcurrent Protection Heat Sink Thermostat Operating Overcurrent Break INV Error Overcharged Refrigerant The flag corresponding to the item where there is an error delay lights up. E* TH Error TH Error LD Error LD Error TH Error TH6 Error HPS Error THHS Error TH Error TH9 Error TH0 Error LPS Error note : only PURY-P

154 for PURY-(P)00 0YMF-C No SW Item Display Remarks 6890 LD LD LD LD LD LD6 LD LD Outdoor Preliminary Error History High Pressure Error, Suction pressure Error TH Error Low Pressure Error Configuration Detection Error TH Error Discharge Error Comp. temperature Error LD Error Overcurrent Protection LD Error Heat Sink Thermostat Operation TH Error Overcurrent Break TH6 Error HPS Error Overcharged Refrigerant THHS Error Lights up if an error delay has occurred between the time the power was turned on and the present time. To turn the indicators off, switch the power OFF briefly. E* TH Error TH9 Error TH0 Error Error History 0 ~ 9999 The error and error delay code are displayed. If the address and error code are shown in reverse, or there is no error, is displayed. E Inverter Error Detail Inverter Error Detail ( ~ ) If there is no error, is displayed. E Error History 0 ~ 9999 E Inverter Error Detail Inverter Error Detail ( ~ ) Error History 0 ~ Inverter Error Detail Inverter Error Detail ( ~ ) Error History 0 ~ Inverter Error Detail Inverter Error Detail ( ~ ) Error History 0 ~ Inverter Error Detail Inverter Error Detail ( ~ ) Error History 6 0 ~ Inverter Error Detail Inverter Error Detail ( ~ ) Error History 0 ~ Inverter Error Detail Inverter Error Detail ( ~ ) Error History 8 0 ~ Inverter Error Detail Inverter Error Detail ( ~ ) Error History 9 0 ~ Inverter Error Detail Inverter Error Detail ( ~ ) Error History 0 0 ~ Inverter Error Detail Inverter Error Detail ( ~ ) Type of Inverter Error Preliminary (Details of the inverter error in No. ) 0 ~ 9999 If there is no error, is always overwritten. E* TH Data ~ E* TH Data LD Data LD Data 0 : OFF : ON : OPEN 0 : OFF : ON : OPEN No. THHS data are monitored by the inverter microcomputer TH Data ~ TH6 Data

155 for PURY-(P)00 0YMF-C No SW Item Display Remarks 6890 LD LD LD LD LD LD6 LD LD THHS Data ~ E* HPS Data TH Data TH9 Data ~ TH0 Data LPS Data α OC 0 ~ α OC* Accumulator Level α OC* and below are displayed alternately at every seconds. Accumulator Level: 0~9 ( AL= is also displayed), α OC*: 0~ HzAK Increase/ Decrease Hz Hz 0 Hz + AK AK 0 AK Difference from Target Tc (Tcm-Tc) Low - deg. or lower Low - ~ - deg. Low - ~ - deg. Stable Region High ~ deg. High ~ deg. High deg or higher Difference from Target Te (Tem-Te) Low - deg. or lower Low - ~ - deg. Low - ~ - deg. Stable Region High ~ deg. High ~ deg. High deg or higher Tc ~ Te Tcm Tem Comp Frequency 0 ~ 9999 Control Frequency E* INV Output Frequency Frequency actually output from the inverter. E* AK E* SLEV BC Address FANCON Output Value (Toff%) Displays the FANCON output value used for control. E* INV Output Current (IAC) ~ (M) Monitored by the inverter s microcomputer OC Address 0 ~ IC Address/ Capacity Code 0 ~ 99 0 ~ 99 E IC Address/ Capacity Code IC Address/ Capacity Code IC Address/ Capacity Code On the left (LD~LD), the IC address, and on the right (LD~LD8), the capacity code is displayed (displayed alternately every minute) IC Address/ Capacity Code IC6 Address/ Capacity Code

156 for PURY-(P)00 0YMF-C When there is an error stop with No9-,the data on error stops or the data immediately before the error postponement stop, which is stored in service memory, are displayed. No SW Item Display Remarks 6890 LD LD LD LD LD LD6 LD LD IC Address/ Capacity Code 0 ~ 99 0 ~ 99 E IC8 Address/ Capacity Code IC9 Address/ Capacity Code IC0 Address/ Capacity Code 0 ~ 9999 On the left (LD~LD), the IC address, and on the right (LD~LD8), the capacity code is displayed (displayed alternately every seconds) IC Address/ Capacity Code IC Address/ Capacity Code IC Address/ Capacity Code IC Address/ Capacity Code IC Address/ Capacity Code IC6 Address/ Capacity Code COMP Operation Time, Higher order digits 0 ~ 9999 E* Lower order digits Outdoor Operation\Mode Permissible Stop Standby Defrost Coolingonly Coolingmain Heatingonly Heatingmain E Outdoor Control Mode Cooling-only Refrigerant Recovery Cooling-main Refrigerant Recovery Heating-only Refrigerant Recovery Heating-main Refrigerant Recovery Coolingonly Oil Recovery Coolingmain Oil Recovery Heatingonly Oil Recovery Heatingmain Oil Recovery Relay Output Display Lighting Display COMP Operating Crankcase Heater ON S SV SV SV SV TH Data ~ TH Data LD Data LD Data TH Data TH6 Data HPS Data THHS Data 0 : OFF : ON : OPEN 0 : OFF : ON : OPEN ~ TH Data TH9 Data TH0 Data LPS Data α OC ~ ~ 9.999

157 for PURY-(P)00 0YMF-C When there is an error stop with No9-,the data on error stops or the data immediately before the error postponement stop, which is stored in service memory, are displayed. No SW Item Display Remarks 6890 LD LD LD LD LD LD6 LD LD α OC* 0 ~ E Tc ~ Te Configuration Correction Value INV Output Frequency 0 ~ AK SLEV Relay out put Display lighting Display SV SV6 SSR DC Trunk Line Current Outdoor Operation Display BC operating command Warmup mode -minute Restart protection mode ~ Compressor Operating Preliminary Error Error BC All Indoor Mode Coolingonly ON Coolingonly OFF Heatingonly ON Heatingonly OFF Mixed ON Mixed OFF Fan Stop Elapsed Time for CS Circuit Closed Detection 0 ~ 9999 Above 9999, 9999 is displayed BC TH Data ~ M IBC TH Data BC TH Data BC TH Data BC TH Data BC TH 6 Data BC P Data BC P Data BC SC Data BC SH Data BC SH Data BC SC 6 Data 6

158 for PURY-(P)00 0YMF-C No SW Item Display Remarks 6890 LD LD LD LD LD LD6 LD LD BC LEV Data ~ M BC LEV Data BC LEV Data IC liquid Pipe IC liquid Pipe IC liquid Pipe IC liquid Pipe IC liquid Pipe IC6 liquid Pipe IC liquid Pipe IC8 liquid Pipe IC9 liquid Pipe IC0 liquid Pipe IC liquid Pipe IC liquid Pipe IC liquid Pipe IC liquid Pipe IC liquid Pipe IC6 liquid Pipe IC Gas Pipe IC Gas Pipe IC Gas Pipe IC Gas Pipe IC Gas Pipe IC6 Gas Pipe M

159 for PURY-(P)00 0YMF-C No SW Item Display Remarks 6890 LD LD LD LD LD LD6 LD LD IC Gas Pipe IC8 Gas Pipe IC9 Gas Pipe IC0 Gas Pipe IC Gas Pipe IC Gas Pipe IC Gas Pipe IC Gas Pipe IC Gas Pipe IC6 Gas Pipe ~ M IC SH M IC SH IC SH IC SH IC SH IC6 SH IC SH IC8 SH IC9 SH IC0 SH IC SH IC SH IC SH IC SH IC SH IC6 SH IC SC M IC SC IC SC IC SC IC SC IC6 SC IC SC IC8 SC 8

160 for PURY-(P)00 0YMF-C No SW Item Display Remarks 6890 LD LD LD LD LD LD6 LD LD IC9 SC ~ M IC0 SC IC SC IC SC IC SC IC SC IC SC IC6 SC IC LEV Opening pulse IC LEV Opening pulse IC LEV Opening pulse IC LEV Opening pulse IC LEV Opening pulse IC6 LEV Opening pulse IC LEV Opening pulse IC8 LEV Opening pulse IC9 LEV Opening pulse IC0 LEV Opening pulse IC LEV Opening pulse IC LEV Opening pulse IC LEV Opening pulse IC LEV Opening pulse IC LEV Opening pulse IC6 LEV Opening pulse 0 ~ 9999 M IC Operation Mode/ Branch Number IC Operation Mode/ Branch Number IC Operation Mode/ Branch Number IC Operation Mode/ Branch Number 0: Stop : Fan : Cooling : Heating : Dry 0 ~ 99 M On the left (LD~LD), the IC address, and on the right (LD~LD8), the capacity code is displayed (displayed alternately every seconds) IC Operation Mode/ Branch Number 9

161 for PURY-(P)00 0YMF-C No SW Item Display Remarks 6890 LD LD LD LD LD LD6 LD LD IC6 Operation Mode/ Branch Number IC Operation Mode/ Branch Number IC8 Operation Mode/ Branch Number IC9 Operation Mode/ Branch Number IC0 Operation Mode/ Branch Number IC Operation Mode/ Branch Number 0: Stop : Fan : Cooling : Heating : Dry 0 ~ 99 M On the left (LD~LD), the IC address, and on the right (LD~LD8), the capacity code is displayed (displayed alternately every seconds) IC Operation Mode/ Branch Number IC Operation Mode/ Branch Number 0000 IC Operation Mode/ Branch Number IC Operation Mode/ Branch Number IC6 Operation Mode/ Branch Number IC Filter 0 ~ 9999 M IC Filter IC Filter 0000 IC Filter IC Filter 0000 IC6 Filter IC Filter 000 IC8 Filter IC9 Filter IC0 Filter IC Filter 000 IC Filter 0000 IC Filter 000 IC Filter 000 IC Filter 00 IC6 Filter 60

162 8 PREPARATION, REPAIRS AND REFRIGERANT REFILLING WHEN REPAIRING LEAKS [] Location of leaks: Extension piping or indoor units (when cooling) <PU(H)Y-(P)00 0YMF-C> Connect a pressure gauge to the low-pressure servicing check joint CJ. Test run all indoor units in cooling mode.. With SW- on the MAIN board of the outdoor unit set to ON and SW- OFF ON to test run all indoor units.. Change the remote controller settings so that all indoor units run in cooling mode.. Check that all indoor units are running in cooling mode. Perform a pump down operation.. Close the liquid ball valve (BV) on the outdoor unit to begin the pump down. When the pressure gauge on the low-pressure servicing check joint CJ reads kg/cm G (0.0MPa), stop all indoor units and the compressor.. With SW- on the MAIN board of the outdoor unit set to ON and SW- ON OFF to stop all indoor units and the compressor.. Check that all indoor units have been stopped. Close the gas ball valve (BV) on the outdoor unit. 6 Remove any refrigerant remaining in the extension piping or the indoor units. Reclaim the refrigerant; do not discharge it into the air. Repair the leak point. 8 After the leak point is repaired, extract all air from the extension piping and the indoor units to create a vacuum. 9 Open both ball valves (BV and BV) on the outdoor unit, then adjust the refrigerant amount and verify that the refrigerant is circulating properly. <PURY-(P)00 0YMF-C> (Pump down operation) Attach a pressure gage to the low-pressure servicing check joint (CJ). Stop all of the indoor units. When the compressor has stopped, shut off the liquid ball valve (BV) for the outdoor unit. Stop all of the indoor units. When the compressor has stopped, turn the SW-6 switch on the main board for the outdoor unit to ON. (This will start the pump down operation causing all of the indoor units to enter the cooling mode.) While in the pump down operation (SW-6 ON), the low pressure (LPS) will reach below at least kg/cm G (0.0 MPa) or the indoor unit and the compressor will automatically shut down within minutes of starting the pump down operation. Shut down all of the indoor units and the compressor if the pressure gage for the lowpressure servicing joint (CJ) reads. kg/cm G (0. MPa) or after running the pump down operation for 0 minutes. Shut off the gas ball valve (BV) for the outdoor unit. 6 Remove any refrigerant remaining in the extension piping and the indoor units. Be sure to recover the refrigerant without releasing it into the air. Repair the location of the leak. 8 After repairing the leak, create a vacuum to remove any air from inside of the extension piping or the indoor units. 9 Open the ball valves for the outdoor unit (BV and BV), turn the SW-6 switch to OFF, adjust refrigerant levels and confirm proper circulation. [] Location of leaks: Outdoor unit (Cooling mode) Test run all indoor units in cooling mode.. With SW- on the MAIN board of the outdoor unit set to ON and SW- OFF ON to test run all indoor units.. Change the remote controller settings so that all indoor units run in cooling mode.. Check that all indoor units are running in cooling mode. 6

163 - Check the Tc and TH data (PUHY-P00 0YMF-C). (The self-diagnosis switch (SW) on the MAIIN board of the outdoor unit can be used to display this data on the LED.). If Tc TH is 0 degrees or more... Continue to step.. If Tc TH is less than 0 degrees... After stopping the compressor, remove any refrigerant, repair the leak point, then extract the air to create a vacuum and refill with new refrigerant (same procedure as. Location of leaks: Outdoor unit (when heating)). [Tc self-diagnosis switch] ON [TH self-diagnosis switch] ON - Check the Tc and SC6 data. (PURY-P00 0YMF-C) (The LED monitor switch (SW) on the MAIN board of the outdoor unit can be used to display this data on the LED.). If SC6 is 0 degrees or more... Continue to step.. If SC6 is less than 0 degrees... After stopping the compressor, remove any refrigerant, repair the leak point, then extract the air to create a vacuum and refill with new refrigerant (same procedure as. Location of leaks: Outdoor unit (when heating)). [Tc LED monitor switch] ON [SC6 LED monitor switch] ON Stop all indoor units and the compressor.. With SW- on the MAIN board of the outdoor unit set to ON and SW- ON OFF to stop all indoor units and the compressor.. Check that all indoor units have been stopped. Close both ball valves (BV and BV). Remove a small amount of refrigerant from the liquid ball valve (BV) check joint. If this operation is not performed, remaining refrigerant may cause the unit to malfunction. 6 Remove any refrigerant remaining in the outdoor unit. Reclaim the refrigerant; do not discharge it into the air. Repair the leak point. 8 After the leak point is repaired, change the dryer and extract all of the air from the outdoor unit to create a vacuum. 9 Open both ball valves (BV and BV) on the outdoor unit, then adjust the refrigerant amount and verify that the refrigerant is circulating properly. [] Location of leaks: Extension piping or indoor units (Heating mode) Test run all indoor units in heating mode.. With SW- on the MAIN board of the outdoor unit set to ON and SW- OFF ON to test run all indoor units.. Change the remote controller settings so that all indoor units run in heating mode.. Check that all indoor units are running in heating mode. Stop all indoor units and the compressor.. With SW- on the MAIN board of the outdoor unit set to ON and SW- ON OFF to stop all indoor units and the compressor.. Check that all indoor units have been stopped. Close both ball valves (BV and BV). Remove any refrigerant remaining in the extension piping or the indoor units. Reclaim the refrigerant; do not discharge it into the air. Repair the leaks. 6 After the leaks are repaired, extract all air from the extension piping and the indoor units to create a vacuum. Then, open both ball valves (BV and BV), then adjust the refrigerant amount and verify that the refrigerant is circulating properly. 6

164 [] Location of leaks: Outdoor unit (when heating) Remove any refrigerant from the entire system (outdoor unit, extension piping and indoor units). Reclaim the refrigerant; do not discharge it into the air. Repair the leaks. After the leaks are repaired, replace the dryer with a new one and extract all of the air from the entire system to create a vacuum. Then, refill with refrigerant until it reaches the calculated specification (outdoor unit + extension piping + indoor units). Refer to Chapter 6 for more details. 6

165 9 CHECK THE COMPOSITION OF THE REFRIGERANT (PURY-P00 0YMF-C only) YES NO Start Test run all indoor units. Are all units operating stably? (Note ) NO YES Is the refrigerant composition of αoc correct? (Note ) NO YES Finished checking the composition. Check TH, TH9, LPS and the CS circuit block and correct any malfunctions. (Note ) Is the refrigerant composition of αoc correct? (Note ) NO YES Finished checking the composition. Check that R0 is correctly charged. (Note ) NO Recharge the refrigerant. (Note ) YES Calibrate the refrigerant composition of αoc. (Note 6) Finished checking the composition. 6

166 Note Wait until the units stabilize as described in the refrigerant amount adjustment procedure in Chapter 6. Note After the units are operating stably, check that the refrigerant composition of αoc is within the following ranges, indicating that the composition check is finished. If the accumulator liquid level AL = 0 when cooling: αoc = 0.0 ~ 0.6 If the accumulator liquid level AL = when cooling: αoc = 0. ~ 0. When heating: αoc = 0. ~ 0. (The self-diagnosis switch (SW) on the main board of the outdoor unit can be used to display this data on the LED.) [αoc self-diagnosis switch] ON Note TH and TH9: Check and make any corrections using the same method as that for a faulty temperature sensor, (refer to TROUBLESHOOTING). LPS: Check and make any corrections using the same method as that for a faulty low pressure sensor, (refer to TROUBLESHOOTING). CS circuit block: Set the self-diagnosis switch on the outdoor MAIN board as shown below ON Check and make any corrections so that 0 is displayed. If any number other than 0 is displayed and TH, TH9 or LPS are malfunctioning, correct them, then set SW-9 on the MAIN board of the outdoor unit from OFF to ON. If any number other than 0 is displayed and TH, TH9 or LPS are not malfunctioning, replace the CS circuit if refrigerant is not flowing through it (while operating) and set SW-9 on the MAIN board of the outdoor unit from OFF to ON. Note Note Note 6 If it can be verified that R0C was correctly charged in the liquid phase, continue to Yes. If there is a possibility that it was not charged correctly, such as with a gas charger, continue to No. After reclaiming the system s refrigerant, extract the air to create a vacuum, then refill with new refrigerant. Be sure to charge in the liquid phase. In addition, be sure to change the dryer. After the units are operating stably, check that the refrigerant composition of αoc is within the following ranges, indicating that the circulation check is finished. If the accumulator liquid level AL = 0 when cooling: αoc = 0. ~ 0. If the accumulator liquid level AL = when cooling: αoc = 0. ~ 0.8 When heating: αoc = 0. ~ 0. If the refrigerant composition of αoc is not within the ranges specified above, a large error has been detected. Refer to section - in Chapter 6, then after setting SW- on the MAIN board of the outdoor unit to ON, calibrate the refrigerant circulation constant αoc with SW- until it is within the ranges specified above. After calibrating, keep the SW- ON and finish the circulation check. <Example calibration of the refrigerant circulation constant αoc> Conditions: If the accumulator liquid level AL = 0 and αoc = 0.9 when cooling, αoc must be adjusted so that it is between 0. and 0.. By switching SW- between ON and OFF, adjustments can be made in the following order: 0 % 6% 9% % -6% -% 0 For this example, by making an adjustment of (-6%), αoc can be adjusted to 0... If SW- is already set to OFF, change the switch times. OFF (0.9) ON (0.) OFF (0.) ON (0.8) OFF (0.) ON (0.). If SW- is already set to ON, change the switch times. ON (0.9) OFF (0.) ON (0.) OFF (0.8) ON (0.) OFF (0.) 6