DC INVERTER SPLIT SYSTEM AIR CONDITIONER

Transcription

1 AIR CONDITIONER TECHNICAL & SERVICE MANUAL SAP-KRV93EH + SAP-CRV93EH SAP-KRV123EH + SAP-CRV123EH FILE NO. Destination: Europe DC INVERTER SPLIT SYSTEM AIR CONDITIONER Indoor Model No. Product Code No. SAP-KRV93EH SAP-KRV123EH Outdoor Model No. Product Code No. SAP-CRV93EH SAP-CRV123EH Indoor Unit Outdoor Unit SAP-KRV93EH SAP-KRV123EH SAP-CRV93EH SAP-CRV123EH IMPORTANT These air conditioners employ new refrigerant R410A. Pay special attention when servicing the unit. REFERENCE NO. SM W

2 IMPORTANT! Please Read Before Starting This air conditioning system meets strict safety and operating standards. As the installer or service person, it is an important part of your job to install or service the system so it operates safely and efficiently. For safe installation and trouble-free operation, you must: Carefully read this instruction booklet before beginning. Follow each installation or repair step exactly as shown. Observe all local, state, and national electrical codes. Pay close attention to all warning and caution notices given in this manual. This symbol refers to a hazard or unsafe practice which WARNING can result in severe personal injury or death. This symbol refers to a hazard CAUTION or unsafe practice which can result in personal injury or product or property damage. If Necessary, Get Help These instructions are all you need for most installation sites and maintenance conditions. If you require help for a special problem, contact our sales/service outlet or your certified dealer for additional instructions. In Case of Improper Installation The manufacturer shall in no way be responsible for improper installation or maintenance service, including failure to follow the instructions in this document. SPECIAL PRECAUTIONS WARNING When Wiring ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH. ONLY A QUALIFIED, EXPERIENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM. Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked. Highly dangerous electrical voltages are used in this system. Carefully refer to the wiring diagram and these instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or death. Ground the unit following local electrical codes. Connect all wiring tightly. Loose wiring may cause overheating at connection points and a possible fire hazard. When Transporting Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and bend your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fins on the air conditioner can cut your fingers. When Installing In a Ceiling or Wall Make sure the ceiling/wall is strong enough to hold the unit s weight. It may be necessary to construct a strong wood or metal frame to provide added support. In a Room Properly insulate any tubing run inside a room to prevent sweating that can cause dripping and water damage to walls and floors. In Moist or Uneven Locations Use a raised concrete pad or concrete blocks to provide a solid, level foundation for the outdoor unit. This prevents water damage and abnormal vibration. In an Area with High Winds Securely anchor the outdoor unit down with bolts and a metal frame. Provide a suitable air baffle. In a Snowy Area (for Heat Pump-type Systems) Install the outdoor unit on a raised platform that is higher than drifting snow. Provide snow vents. When Connecting Refrigerant Tubing Use the flare method for connecting tubing. Apply refrigerant lubricant to the matching surfaces of the flare and union tubes before connecting them, then tighten the nut with a torque wrench for a leakfree connection. Check carefully for leaks before starting the test run. When Servicing Turn the power OFF at the main power box (mains) before opening the unit to check or repair electrical parts and wiring. Keep your fingers and clothing away from any moving parts. Clean up the site after you finish, remembering to check that no metal scraps or bits of wiring have been left inside the unit being serviced. Others CAUTION Ventilate any enclosed areas when installing or testing the refrigeration system. Escaped refrigerant gas, on contact with fire or heat, can produce dangerously toxic gas. Confirm upon completing installation that no refrigerant gas is leaking. If escaped gas comes in contact with a stove, gas water heater, electric room heater or other heat source, it can produce dangerously toxic gas. 2

3 Table of Contents 1. OPERATING RANGE... 4 Page 2. SPECIFICATIONS 2-1. Unit Specifications Major Component Specifications Other Component Specifications DIMENSIONAL DATA REFRIGERANT FLOW DIAGRAM 4-1. Refrigerant Flow Diagram PERFORMANCE DATA 5-1. Temperature Charts Air Throw Distance Charts Operating Frequency Charts ELECTRICAL DATA 6-1. Electrical Characteristics Electric Wiring Diagrams INSTALLATION INSTRUCTIONS 7-1. Installation Site Selection Recommended Wire Length and Diameter Remote Control Unit Installation Position How to Test Run the Air Conditioner Remove the Grille to Install the Indoor Unit MAINTENANCE 8-1. Address Setting of the Remote Control Unit Disconnecting and Connecting Positive Connector for Outdoor Unit FUNCTIONS 9-1. Operation Functions Protective Functions TROUBLESHOOTING CHECKING ELECTRICAL COMPONENTS Measurement of Insulation Resistance Checking Continuity of Fuse on PCB Ass y REFRIGERANT R410A: SPECIAL PRECAUTIONS WHEN SERVICING UNIT APPENDIX INSTRUCTION MANUAL

4 1. OPERATING RANGE Cooling Heating Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp. Maximum 32 C D.B. / 23 C W.B. 43 C D.B. Minimum 19 C D.B. / 14 C W.B. 19 C D.B. Maximum 27 C D.B. 24 C D.B. / 18 C W.B. Minimum 16 C D.B. 20 C D.B. / 20 C W.B. 4

5 2. SPECIFICATIONS 2-1. Unit Specifications Indoor Unit Outdoor Unit SAP-KRV93EH SAP-CRV93EH Power Source Voltage Rating V Single-phase 50Hz 230V Performance Cooling Heating Capacity kw 2.65 ( ) 3.60 ( ) BTU/h 9,000 (3,100 10,900) 12,300 (3,100 17,100) Air circulation (High) m 3 /h Moisture removal (High) Liters/h 1.6 Electrical Rating Cooling Heating Available voltage range V Running amperes A 3.86 ( ) 4.81 ( ) Power input W 755 (250 1,150) 995 (250 1,340) Power factor % C.O.P. W/W Compressor locked rotor amperes A 15 Features Controls / Temperature control Microprocessor / I.C. thermister Control unit Wireless remote control unit Timer ON / OFF 24 hours & Daily program, 1-hour OFF Fan speeds Indoor / Outdoor 3 and Auto / 1 (Hi) Airflow direction (Indoor) Horizontal Manual Vertical Auto Air filter Washable, Anti-Mold Compressor Rotary (DC inverter) Refrigerant / Amount charged at shipment g R410A / 950 Refrigerant control Electric expansion valve Operation sound Indoor: Hi / Me / Lo db-a 34 / 31 / / 31 / 28 Outdoor: Hi db-a Refrigerant tubing connections Flare type Max allowable tubing length at shipment m 7.5 Refrigerant Narrow tube mm (in.) 6.35 (1/4) tube diameter Wide tube mm (in.) 9.52 (3/8) Refrigerant tube kit / Accessories Optional / Air clean filter Dimensions & Weight Indoor Unit Outdoor Unit Unit dimensions Height mm Width mm Depth mm Package dimensions Height mm Width mm Depth mm Weight Net kg Shipping kg Shipping volume m Remarks: Rating conditions are: Cooling: Indoor air temperature 27 C D.B. / 19 C W.B. Outdoor air temperature 35 C D.B. / 24 C W.B. Heating: Indoor air temperature 20 C D.B. Outdoor air temperature 7 C D.B. / 6 C W.B. DATA SUBJECT TO CHANGE WITHOUT NOTICE. 5

6 Indoor Unit Outdoor Unit SAP-KRV123EH SAP-CRV123EH Power Source Voltage Rating V Single-phase 50Hz 230V Performance Cooling Heating Capacity kw 3.50 ( ) 4.20 ( ) BTU/h 11,900 (3,100 13,000) 14,300 (3,100 19,800) Air circulation (High) m 3 /h Moisture removal (High) Liters/h 2.0 Electrical Rating Cooling Heating Available voltage range V Running amperes A 5.21 ( ) 5.48 ( ) Power input W 1,090 (250 1,300) 1,165 (250 1,500) Power factor % C.O.P. W/W Compressor locked rotor amperes A 15 Features Controls / Temperature control Microprocessor / I.C. thermostat Control unit Wireless remote control unit Timer ON / OFF 24 hours & Daily program, 1-hour OFF Fan speeds Indoor / Outdoor 3 and Auto / 1 (Hi) Airflow direction (Indoor) Horizontal Manual Vertical Auto Air filter Washable, Anti-Mold Compressor Rotary (DC inverter) Refrigerant / Amount charged at shipment g R410A / 1,100 Refrigerant control Electric expansion valve Operation sound Indoor: Hi / Me / Lo db-a 36 / 33 / / 31 / 29 Outdoor: Hi db-a Refrigerant tubing connections Flare type Max allowable tubing length at shipment m 7.5 Refrigerant Narrow tube mm (in.) 6.35 (1/4) tube diameter Wide tube mm (in.) 9.52 (3/8) Refrigerant tube kit / Accessories Optional / Air clean filter Dimensions & Weight Indoor Unit Outdoor Unit Unit dimensions Height mm Width mm Depth mm Package dimensions Height mm Width mm Depth mm Weight Net kg Shipping kg Shipping volume m Remarks: Rating conditions are: Cooling: Indoor air temperature 27 C D.B. / 19 C W.B. Outdoor air temperature 35 C D.B. / 24 C W.B. Heating: Indoor air temperature 20 C D.B. Outdoor air temperature 7 C D.B. / 6 C W.B. 6 DATA SUBJECT TO CHANGE WITHOUT NOTICE.

7 2-2. Major Component Specifications Indoor Unit Indoor Unit SAP KRV93EH Control PCB Part No. CB-KRV93EH (POW-KRV93GJH) Controls Microprocessor Control circuit fuse 250V 3.15A Remote Control Unit RCS-3HVPSS4E Fan & Fan Motor Type Fan / Fan motor Cross-flow / AC motor Q ty Dia. and length mm 1 D92 / L634 Fan motor model Q ty IBH No. of poles Rough measure rpm (Cool / Heat) 4 1,200 / 1,250 Nominal output W 30 Coil resistance (Ambient temp. 20 C) Ω BRN WHT: 234 PNK (RED) WHT: 209 : Safety devices Type Thermal fuse Operating temp. Open C 130 Close Run capacitor µf 1.2 VAC 440 Flap Motor and Louver Motor Type Stepping motor Model MP24Z3-12V Rating DC 12V Coil resistance (Ambient temp. 25 C) Ω Each pair of terminals: 400 ± 7% Heat Exchanger Coil Coil Aluminum plate fin / Copper tube Rows 2 Fin pitch mm 1.3 Face area m DATA SUBJECT TO CHANGE WITHOUT NOTICE. 7

8 Indoor Unit SAP KRV123EH Control PCB Part No. CB-KRV123EH (POW-KRV93GJH) Controls Microprocessor Control circuit fuse 250V 3.15A Remote Control Unit RCS-3HVPSS4E Fan & Fan Motor Type Fan / Fan motor Cross-flow / AC motor Q ty Dia. and length mm 1 D92 / L634 Fan motor model Q ty IBH No. of poles Rough measure rpm (Cool / Heat) 4 1,250 / 1,250 Nominal output W 30 Coil resistance (Ambient temp. 20 C) Ω BRN WHT: 234 PNK (RED) WHT: 209 : Safety devices Type Thermal fuse Operating temp. Open C 130 Close Run capacitor µf 1.2 VAC 440 Flap Motor and Louver Motor Type Stepping motor Model MP24Z3-12V Rating DC 12V Coil resistance (Ambient temp. 25 C) Ω Each pair of terminals: 400 ± 7% Heat Exchanger Coil Coil Aluminum plate fin / Copper tube Rows 2 Fin pitch mm 1.3 Face area m DATA SUBJECT TO CHANGE WITHOUT NOTICE. 8

9 Outdoor Unit Outdoor Unit SAP CRV93EH Control PCB (A) / Control PCB (B) Part No. Controls Control circuit fuse CB-CRV93EH (POW-CRV93GJH) Microprocessor 250V, 20A Compressor Type DC Rotary (Hermetic) Compressor model / Nominal output G4C090LU1ER / 600W Compressor oil Amount cc FV50S 320 Coil resistance (Ambient temp. 20 C) Ω U V: 0.81 V W: 0.81 W U: 0.81 Safety devices CT (Peak current cut-off control) YES Compressor discharge temp. control YES Operation cut-off control in abnormal ambient temp. Run capacitor µf VAC Crankcase heater Fan & Fan Motor Type Fan / Fan motor Propeller / AC motor Q ty Dia. mm Fan motor model Q ty IB No. of poles Rough measure rpm (Cool / Heat) / 700 Nominal output W 20 Coil resistance (Ambient temp. 20 C) Ω WHT BRN: 213 RED (PNK) WHT: 168 : Safety devices Type Thermal fuse Operating temp. Open C 150 Close C Run capacitor on control PCB (A) µf 2.0 VAC 440 Heat Exchanger Coil Coil Aluminum plate fin / Copper tube Rows 2 Fin pitch mm 1.4 Face area m External Finish Acrylic baked-on enamel finish DATA SUBJECT TO CHANGE WITHOUT NOTICE. 9

10 Outdoor Unit SAP CRV123EH Control PCB (A) / Control PCB (B) Part No. Controls Control circuit fuse CB-CRV123EH (POW-CRV123GJH) Microprocessor 250V, 20A Compressor Type DC Rotary (Hermetic) Compressor model / Nominal output G4C090LU1ER / 600W Compressor oil Amount cc FV50S 320 Coil resistance (Ambient temp. 20 C) Ω U V: 0.81 V W: 0.81 W U: 0.81 Safety devices CT (Peak current cut-off control) YES Compressor discharge temp. control YES Operation cut-off control in abnormal ambient temp. Run capacitor µf VAC Crankcase heater Fan & Fan Motor Type Fan / Fan Motor Propeller / DC Motor Q ty Dia. mm Fan motor model Q ty DAJ12-55J71-C 1 No. of poles Rough measure rpm (Cool / Heat) / 750 Nominal output W 50 Coil resistance (Ambient temp. 20 C) Ω Safety devices Type Operating temp. Open C Close C Run capacitor on control PCB (A) µf VAC Heat Exchanger Coil Coil Aluminum plate fin / Copper tube Rows 2 Fin pitch mm 1.4 Face area m External Finish Acrylic baked-on enamel finish DATA SUBJECT TO CHANGE WITHOUT NOTICE. 10

11 2-3. Other Component Specifications Indoor Unit Outdoor Unit SAP KRV93EH SAP KRV123EH SAP CRV93EH SAP CRV123EH Resistance (kω) Indoor air temp sensor Resistance (kω) Indoor heat exchanger sensor Compressor temp sensor Temperature ( C) Temperature ( C) Outdoor air temp sensor Outdoor heat exchanger sensor Resistance (kω) Temperature ( C) 11

12 3. DIMENSIONAL DATA Indoor Unit SAP-KRV93EH SAP-KRV123EH Drain hose ø (ø65) Wide tube ø9.52(3/8") Unit: mm Narrow tube ø6.35(1/4") (ø65)

13 Outdoor Unit SAP-CRV93EH SAP-CRV123EH AIR INTAKE ID:ø18 ID:2-ø ø12 holes Wide tube service valve ø9.52 (3/8") Narrow tube service valve ø6.35 (1/4") AIR INTAKE (12 class only) AIR DISCHARGE Unit: mm 13

14 4. REFRIGERANT FLOW DIAGRAM 4-1. Refrigerant Flow Diagram Indoor Unit SAP-KRV93EH Outdoor Unit SAP-CRV93EH SAP-CRV123EH SAP-CRV123EH Indoor unit Outdoor unit Wide tube O.D. ø9.52 mm (3/8 ") Wide tube service valve Muffler Accumulator 4-way valve Compressor Heat exchanger Narrow tube Narrow tube service valve Modulator (12 class only) Electric expansion valve M Capillary tube for split flow Heat exchanger O.D. ø6.35 mm (1/4") Strainer Muffler (12 class only) Cooling cycle (Defrosting cycle) Heating cycle Insulation of Refrigerant Tubing IMPORTANT Because capillary tubing is used in the outdoor unit, both the wide and narrow tubes of this air conditioner become cold. To prevent heat loss and wet floors due to dripping of condensation, both tubes must be well insulated with a proper insulation material. The thickness of the insulation should be a min. 8 mm. Thickness: Min. 8 mm Insulation Thickness: Min. 8 mm CAUTION After a tube has been insulated, never try to bend it into a narrow curve because it can cause the tube to break or crack. Wide tube Narrow tube 14

15 5. PERFORMANCE DATA 5-1. Temperature Charts Indoor Unit Outdoor Unit SAP-KRV93EH SAP-CRV93EH Cooling Characteristics Low pressure at wide tube service valve MPa (kgf/cm 2 G) 1.3 (12.2) 1.2 (11.2) 1.1 (10.2) 27 C Indoor Air Temp.30 C 24 C 1.0 (9.2) Outdoor inlet air D.B. temp.( C) Heating Characteristics High pressure at wide tube service valve MPa (kgf/cm 2 G) 3.5 (34.7) 3.0 (29.6) 2.5 (24.5) 2.0 (19.4) 20 C Indoor Air Temp.23 C 17 C Outdoor inlet air D.B. temp.( C) Operating current (A) 4 3 Indoor Air Temp.30 C 27 C 24 C Operating current (A) Indoor Air Temp.23 C 20 C 17 C Outdoor inlet air D.B. temp.( C) Outdoor inlet air D.B. temp.( C) Indoor discharge air temperature ( C) Indoor Air Temp.30 C 27 C 24 C Outdoor inlet air D.B. temp.( C) Outdoor inlet air D.B. temp.( C) Indoor discharge air temperature ( C) Indoor Air Temp.23 C 20 C 17 C NOTE Overload prevention operates to protect the air conditioner when outdoor ambient temperature becomes extremely high in heating mode. (Refer to 9-2. Overload prevention during heating. ) Points of rating condition Black dots in above charts indicate the following rating conditions. Cooling: Indoor air temperature 27 C D.B. / 19 C W.B. Heating: Indoor air temperature 20 C D.B. Outdoor air temperature 35 C D.B. / 24 C W.B. Outdoor air temperature 7 C D.B. / 6 C W.B. 15

16 Indoor Unit Outdoor Unit SAP-KRV123EH SAP-CRV123EH Cooling Characteristics Heating Characteristics Low pressure at wide tube service valve MPa (kgf/cm 2 G) 1.3 (12.2) 1.2 (11.2) 1.1 (10.2) 1.0 (9.2) 25 Outdoor fan speed Low High Indoor Air Temp.30 C 27 C 24 C High pressure at wide tube service valve MPa (kgf/cm 2 G) 3.5 (34.7) 3.0 (29.6) 2.5 (24.5) (19.4) Outdoor inlet air D.B. temp.( C) Outdoor inlet air D.B. temp.( C) 20 C Indoor Air Temp.23 C 17 C 9 8 Outdoor fan speed Low High 9 8 Operating current (A) C 27 C 24 C Operating current (A) Indoor Air Temp.23 C 20 C 17 C Outdoor inlet air D.B. temp.( C) Outdoor inlet air D.B. temp.( C) Indoor discharge air temperature ( C) 20 Outdoor fan speed 60 Low High Indoor Air Temp.30 C 27 C 24 C Outdoor inlet air D.B. temp.( C) Outdoor inlet air D.B. temp.( C) Indoor discharge air temperature ( C) C 20 C 17 C NOTE Overload prevention operates to protect the air conditioner when outdoor ambient temperature becomes extremely high in heating mode. (Refer to 9-2. Overload prevention during heating. ) Points of rating condition Black dots in above charts indicate the following rating conditions. Cooling: Indoor air temperature 27 C D.B. / 19 C W.B. Heating: Indoor air temperature 20 C D.B. Outdoor air temperature 35 C D.B. / 24 C W.B. Outdoor air temperature 7 C D.B. / 6 C W.B. 16

17 5-2. Air Throw Distance Charts Indoor Unit SAP KRV93EH Cooling Room air temp. : 27 C Fan speed : High Horizontal distance (m) Axis air velocity (m/s) Vertical distance (m) : Flap angle 0, : Axis air velocity 0 : Flap angle 30, : Axis air velocity 30 Heating Room air temp. : 20 C Fan speed : High Horizontal distance (m) Axis air velocity (m/s) Vertical distance (m) : Flap angle 45, : Axis air velocity 45 : Flap angle 60, : Axis air velocity 60 17

18 Indoor Unit SAP KRV123EH Cooling Room air temp. : 27 C Fan speed : High Horizontal distance (m) Axis air velocity (m/s) Vertical distance (m) : Flap angle 0, : Axis air velocity 0 : Flap angle 30, : Axis air velocity 30 Heating Room air temp. : 20 C Fan speed : High Horizontal distance (m) Axis air velocity (m/s) Vertical distance (m) : Flap angle 45, : Axis air velocity 45 : Flap angle 60, : Axis air velocity 60 18

19 5-3. Operating Frequency Charts Indoor Unit Outdoor Unit SAP KRV93EH SAP CRV93EH Cooling 5 230V Single-phase 50Hz 4 Cooling Capacity (kw) Center Max. 1 Min Operating Freqency (Hz) 1200 Max Power Input (W) Center Min Operating Freqency (Hz) NOTE 1) Rating conditions in cooling are: Indoor: 27 C D.B. / 19 C W.B. Outdoor: 35 C D.B. / 24 C W.B. 2) Fan speed: High 19

20 Heating 230V Single-phase 50Hz 5 Max. Heating Capacity (kw) Min. Center Operating Freqency (Hz) 1400 Max Power Input (W) Center Min Operating Freqency (Hz) NOTE 1) Rating conditions in heating are: Indoor: 20 C D.B. Outdoor: 7 C D.B. / 6 C W.B. 2) Fan speed: High 20

21 Indoor Unit Outdoor Unit SAP KRV123EH SAP CRV123EH Cooling 230V Single-phase 50Hz 5 Cooling Capacity (kw) Center Max. 1 Min Operating Freqency (Hz) 1400 Max Center Power Input (W) Min Operating Freqency (Hz) NOTE 1) Rating conditions in cooling are: Indoor: 27 C D.B. / 19 C W.B. Outdoor: 35 C D.B. / 24 C W.B. 2) Fan speed: High 21

22 Heating 230V Single-phase 50Hz 6 Max. Heating Capacity (kw) Min. Center Operating Freqency (Hz) 1600 Max Power Input (W) Center Min Operating Freqency (Hz) NOTE 1) Rating conditions in heating are: Indoor: 20 C D.B. Outdoor: 7 C D.B. / 6 C W.B. 2) Fan speed: High 22

23 6. ELECTRICAL DATA 6-1. Electrical Characteristics Indoor Unit Outdoor Unit SAP-KRV93EH SAP-CRV93EH Cooling Performance at Rating conditions Running amp. A 0.17 Power input kw Rating conditions: Indoor air temperature: 27 C D.B. / 19 C W.B. Outdoor air temperature: 35 C D.B. Indoor Unit Outdoor Unit Complete Unit Fan Motor Fan Motor Compressor 230V Single-phase 50Hz Heating Performance at Rating conditions Running amp. A 0.17 Power input kw Rating conditions: Indoor air temperature 20 C D.B. Outdoor air temperature 7 C D.B. / 6 C W.B. Indoor Unit Outdoor Unit Complete Unit Fan Motor Fan Motor Compressor 230V Single-phase 50Hz Indoor Unit Outdoor Unit SAP-KRV123EH SAP-CRV123EH Cooling Performance at Rating conditions Running amp. A 0.17 Power input kw Rating conditions: Indoor air temperature: 27 C D.B. / 19 C W.B. Outdoor air temperature: 35 C D.B. Indoor Unit Outdoor Unit Complete Unit Fan Motor Fan Motor Compressor 230V Single-phase 50Hz Heating Performance at Rating conditions Running amp. A 0.17 Power input kw Rating conditions: Indoor air temperature: 20 C D.B. Outdoor air temperature: 7 C D.B. / 6 C W.B. Indoor Unit Outdoor Unit Complete Unit Fan Motor Fan Motor Compressor 230V Single-phase 50Hz

24 24 EVAPORATOR FLAP FLAP MOTOR FAN MOTOR FM GRN/YEL GRN/YEL FAN MOTOR CAPACITOR RED PNK BLU BRN YEL (RED) PNK BRN WHT RED BLK YEL Indoor Unit : SAP-KRV93EH BLU PNK POWER RELAY RY01 FLAP 5P(WHT) GRY GRY CONTROLLER FAN 5P(WHT) HALL IC 3P(WHT) FMC1 FMC2 AC IN SI1 SI LAMP 9P(WHT) ROOM/COIL 4P(WHT) HA JEM-A 4P(WHT) BRN TERMINAL BASE GRN/YEL RED BRN BLU GRN/YEL RED WHT WHT WHT WHT WHT WHT WHT WHT L N EARTH IND LAMP ASSY POWER SUPPLY THERMISTOR (ROOM) BLK BLK BLK(ORG) BLK(ORG) THERMISTOR (COIL) 8FA XX TERMINAL BASE T-RUN/TEST E W GRN/YEL BLK WHT GRN/YEL RED FERRITE CORE W W S1 IN2 IN1 CAPACITOR W W W W W W BLU RED OUT+ OUT IN IN+ C FM FM H W ORG (PNK) RED Outdoor Unit : SAP-CRV93EH W BRN WHT BRN WHT FM BLK W YL3P CONNECTOR FAN MOTOR CONTROLLER RV2 RV1 W W BLU BLU BLU BLU RV YL2P CONNECTOR REACTANCE WHT L1 4-WAY VALVE Meaning of Abbreviations ABBREV. 1 BLK BLACK 2 BLU BLUE 3 BRN BROWN MEANING 4 GRN/YEL GREEN/YELLOW 5 GRY GREY 6 ORG ORANGE 7 PNK PINK 8 RED RED 9 VLT VIOLET 10 WHT WHITE 11 YEL YELLOW OUTDOOR THERMISTOR WHT W L2 (WHT) OUTDOOR BLK BLK MAGNETIC COIL ORG RED GRY WHT YEL BLK COIL THERMISTOR MV MV (BLK) YEL YEL BLK BLK W W V W U W (WHT) COIL/COMP COMPRESSOR THERMISTOR BLU WHT RED GRN/YEL (PNK) RED S/U WHT BLU R /V CM VL3P CONNECTOR FERRITE CORE C/W COMPRESSOR MOTOR 8FA XX-0 WARNING To avoid electrical shock hazard, be sure to disconnect power before checking, servicing and/or cleaning any electrical parts. Outdoor Unit SAP-CRV93EH Indoor Unit SAP-KRV93EH 6-2. Electric Wiring Diagrams

25 25 EVAPORATOR FLAP FLAP MOTOR FAN MOTOR FM GRN/YEL GRN/YEL FAN MOTOR CAPACITOR RED PNK BLU BRN YEL (RED) PNK BRN WHT RED BLK YEL Indoor Unit : SAP-KRV123EH BLU PNK POWER RELAY RY01 FLAP 5P(WHT) GRY GRY CONTROLLER FAN 5P(WHT) HALL IC 3P(WHT) FMC1 FMC2 AC IN SI1 SI LAMP 9P(WHT) ROOM/COIL 4P(WHT) HA JEM-A 4P(WHT) BRN TERMINAL BASE GRN/YEL RED BRN BLU GRN/YEL RED WHT WHT WHT WHT WHT WHT WHT WHT L N EARTH IND LAMP ASSY POWER SUPPLY THERMISTOR (ROOM) BLK BLK BLK(ORG) BLK(ORG) THERMISTOR (COIL) 8FA XX TERMINAL BASE T-RUN/TEST E W GRN/YEL BLK WHT GRN/YEL RED FERRITE CORE W W S1 IN2 IN1 ORG BLK W W W W W W OUT+ OUT IN IN WHT GRN/YEL (WHT) DCFM BLK RED BLU YEL FM FAN MOTOR Outdoor Unit : SAP-CRV123EH CONTROLLER RV2 RV1 W W BLU BLU BLU BLU RV YL2P CONNECTOR REACTANCE WHT L1 4-WAY VALVE OUTDOOR THERMISTOR Meaning of Abbreviations ABBREV. 1 BLK BLACK 2 BLU BLUE 3 BRN BROWN MEANING 4 GRN/YEL GREEN/YELLOW 5 GRY GREY 6 ORG ORANGE 7 PNK PINK 8 RED RED 9 VLT VIOLET 10 WHT WHITE 11 YEL YELLOW WHT W L2 (WHT) OUTDOOR BLK BLK MAGNETIC COIL ORG RED GRY WHT YEL BLK COIL THERMISTOR MV MV (BLK) YEL YEL BLK BLK W W V W U W (WHT) COIL/COMP COMPRESSOR THERMISTOR BLU WHT RED GRN/YEL (PNK) RED S/U WHT BLU R /V CM VL3P CONNECTOR FERRITE CORE C/W COMPRESSOR MOTOR 8FA XX-0 WARNING To avoid electrical shock hazard, be sure to disconnect power before checking, servicing and/or cleaning any electrical parts. Outdoor Unit SAP-CRV123EH Indoor Unit SAP-KRV123EH

26 7. INSTALLATION INSTRUCTIONS 7-1. Installation Site Selection Indoor Unit AVOID: WARNING direct sunlight. To prevent abnormal heat generation and the possibility of fire, do not place obstacles, enclosures and grilles in front of or surrounding the air conditioner in a way that may block air flow. nearby heat sources that may affect performance of 5 cm min. Front View Fig cm min. 5 cm min. the unit. areas where leakage of flammable gas may be expected. places where large amounts of oil mist exist. DO: select an appropriate position from which every corner of the room can be uniformly cooled. (High on a wall is best.) INDOOR UNIT Elevation difference (H) Fig. 2 Tubing length (L) OUTDOOR UNIT select a location that will hold the weight of the unit. select a location where tubing and drain hose have the shortest run to the outside. (Fig. 1) allow room for operation and maintenance as well as unrestricted air flow around the unit. (Fig. 2) install the unit within the maximum elevation difference (H) above or below the outdoor unit and within a total tubing length (L) from the outdoor unit as detailed in Table 1 and Fig. 3. Install the indoor unit more than 1 meter away from any antenna or power lines or connecting wires used for television, radio, telephone, security system, or intercom. Electrical noise from any of these sources may affect operation. Table 1 CAUTION For stable operation of the air conditioner, do not install wall-mounted type indoor units less than 1.5 m from floor level. Fig. 3 Indoor unit Minimum height from floor level 1.5 m Floor level Wall Max. Allowable Tubing Limit of Tubing Limit of Elevation Required Amount of Model Length at Shipment Length (L) Difference (H) Additional Refrigerant (m) (m) (m) (g/m)* KRV93 / * If total tubing length becomes 7.5 to 15 m (max.), charge additional refrigerant (R410A) by 15 g/m. No additional compressor oil is necessary. 26

27 Outdoor Unit AVOID: heat sources, exhaust fans, etc. (Fig. 4) damp, humid or uneven locations. DO: choose a place as cool as possible. choose a place that is well ventilated. Outdoor unit Hot air NO Exhaust fan Heat source allow enough room around the unit for air intake/ exhaust and possible maintenance. (Fig. 5a) provide a solid base (level concrete pad, concrete block, cm beams or equal), a minimum of 10 cm above ground level to reduce humidity and protect the unit against possible water damage and decreased service life. (Fig. 5a) Install cushion rubber under unit s feet to reduce vibration and noise. (Fig. 5b) use lug bolts or equal to bolt down unit, reducing vibration and noise. Install in a location where no antenna of a television or radio exists within 3 meters. Air intake Min. 10 cm Min. 5 cm Air discharge Min. 40 cm Fig. 4 Valve side Min. 25 cm Obstacle above Air discharge Ground Min. 2 m Min. 2 m Obstacle Anchor bolts (4 pcs.) Air intake Min. 10 cm Concrete or equal About 40 cm About 10 cm Fig. 5a Cushion rubber Fig. 5b 27

28 7-2. Recommended Wire Length and Diameter Regulations on wiring diameter differ from locality to locality. For field wiring requirements, please refer to your local electrical codes. Carefully observe these regulations when carrying out the installation. Table 2 lists recommended wire lengths and diameters for power supply systems. NOTE Refer to the wiring system diagram (Fig. 6) for the meaning of A, B and C in Table 2. Table 2 Cross-Sectional (A)+(B) (A) Power Supply Wiring Length (m) (C) Control Area (mm 2 ) (B) Power Line Length (m) Line Length (m) Model CRV CRV Fuse or Circuit Breaker Capacity 10A WARNING Be sure to comply with local codes on running the wire from the indoor unit to the outdoor unit (size of wire and wiring method, etc.). Each wire must be firmly connected. No wire should be allowed to touch refrigerant tubing, the compressor, or any moving part. WIRING SYSTEM DIAGRAM INDOOR UNIT OUTDOOR UNIT TERMINAL (B) TERMINAL L N GROUNDING LINE (C) (A) WARNING To avoid the risk of electrical shock, each air conditioner unit must be grounded. For the installation of a grounding device, please observe local electrical codes. Grounding is necessary, especially for units using inverter circuits, in order to release charged electricity and electrical noise caused by high tension. Otherwise, electrical shock may occur. Place a dedicated ground more than 2 meters away from other grounds and do not have it shared with other electric appliances. Power supply: Single-phase VAC 50Hz Fig. 6 CAUTION Be sure to connect the power supply line to the indoor unit as shown in the wiring diagram. The outdoor unit draws its power from the indoor unit. 28

29 7-3. Remote Control Unit Installation Position The remote control unit can be operated from either a non-fixed position or a wall-mounted position. To ensure that the air conditioner operates correctly, do not install the remote control unit in the following places: In direct sunlight Behind a curtain or other place where it is covered More than 8 m away from the air conditioner In the path of the air conditioner s airstream Where it may become extremely hot or cold Where it may be subject to electrical or magnetic interference Where there is an obstacle between the remote control unit and the air conditioner (since a check signal is sent from the remote control unit every 5 minutes) Mounting on a Wall Before mounting the remote control unit, press the ON/OFF operation button at the mounting location to make sure that the air conditioner operates from that location. The indoor unit should make a beeping sound to indicate that it has received the signal. Remote control unit mount Mounting screws 4 16 (included) Press Set in place Rear side Hole To prevent loss of the remote control unit, you can connect the remote control unit to the mount by passing a string through the remote control unit and attachment hole. To take out the remote control unit, pull it forward. Fig. 7 29

30 7-4. How to Test Run the Air Conditioner After turning on power to the air conditioner, use the remote controller and follow the steps below to conduct the test run. (1) Set the remote controller in Test Run mode. (Fig. 8a) a) Press and hold the QUIET button. b) Then press and hold the 1HR TIMER button. c) At the same time, press the ACL (reset) button once. Use a pointed object such as the tip of a pen to press the ACL button. After a few seconds, appears and op-1 blinks in the remote controller display area. (Fig. 8b) d) Release the 1HR TIMER button. e) Release the QUIET button. (2) Start Cooling mode test run by pressing the ON/OFF operation button of the remote controller. (Fig. 8a) This starts the fan producing uncooled forced air with the 3 indicator lamps (OPERATION lamp, TIMER lamp and QUIET lamp) on the main unit blinking. (Fig. 8c) After 3 minutes, the system shifts into cooling operation, and cool air will start to be felt. Cool mode test run is unaffected by the room temperature. (3) Press the ON/OFF operation button of the remote controller again to stop the test run. (Fig. 8a) (4) Finally press the ACL (reset) button of the remote controller to release it from Test Run mode to return to normal mode. (Fig. 8a) and op-1 will disappear from the remote controller display area. IMPORTANT After the test run is completed, be sure to press the ACL (reset) button to return to normal mode. The air conditioner will not operate correctly if this is not done. QUIET button Fig. 8a Fig. 8b ON/OFF operation button 1HR. TIMER button ACL (Reset) button OPERATION lamp TIMER lamp QUIET lamp Fig. 8c 30

31 7-5. Remove the Grille to Install the Indoor Unit Basically, these models can be installed and wired without removing the grille. If access to any internal part is needed, follow the steps as given below. Air intake grille Grille CAUTION Be sure to wear work gloves during installation to avoid being cut by the sharp aluminum fins of the heat exchanger. Fig. 9a How to remove the grille (1) Grasp both ends of the air intake grille, and remove it by opening towards the front and pulling towards you. (Fig. 9a) Screw cover Thermistor Cover Fig. 9b Thermistor (2) Remove the 2 screws. (Fig. 9b) (3) Remove the screw on the right side cover plate and open the cover. (Fig. 10a) (4) Take out the thermistor from the grille. (Fig. 10b) (5) Pull the lower part of the grille toward you to remove. (Fig. 11a) (6) Use a standard screwdriver to push on the tabs to remove the grille. Tab Fig. 10a * Fig. 10b * Grille Frame How to replace the grille (1) Reinstall the grille into the lower part while aligning its tabs on the upper part. (Fig. 11b) Insert the tabs in the slots and push the lower part of the grille back into position. Fig. 11a Tab (2) Make sure that the grille and frame are firmly fitted together by engaging the tabs. * * (3) Attach the thermistor on the grille. (Fig. 10a) (4) Close the cover and replace the screw. (Fig. 10a) (5) Affix the grille with the 2 previously removed screws. (Fig. 9b) (6) Install the air intake grille. Fig. 11b (a) Allow the edge of the air intake grille to slide into the top of the indoor unit, and then insert it all the way inside. (Fig. 12a) Groove Pin (b) Press the bottom right and left corners of the air intake grille to attach it to the indoor unit. (Fig. 12b) Fig. 12b 31 Fig. 12a

32 8. MAINTENANCE 8-1. Address Setting of the Remote Control Unit The address can be set in order to prevent interference between remote controllers when two Sanyo indoor units are installed near each other. The address is normally set to A. To set a different address, it is necessary to change the address on the second remote controller. Tab Fig. 13 NOTE Once changed, you cannot restore the original address setting of the air conditioner. (1) Switch on the power source. (2) Break the address-setting tab marked A on the second remote controller to change the address (Fig. 13). When the tab is removed, the address is automatically set to B (Fig. 14). (3) Press and hold the remote controller QUIET button and 1 HR TIMER button. At the same time, press the ACL (reset) button. Use a thin object such as the tip of a pen to press the ACL button. When this has been done, op-1 (test run) appears, blinking, in the remote controller clock display area. Fig. 14 AIR CONDITIONER ACL button (4) Each time the 1 HR TIMER button is pressed, the display changes as shown below. Press this button 2 times to change the display to op-7 (address setting). (Fig. 15) Test run mode Self-diagnostic mode Address setting mode (5) op-7 has now been selected for address setting. QUIET button UIET 1HR. ON /OFF TEMP. ON/OFF operation button 1HR. TIMER button (6) Press the ON/OFF operation button on the remote controller. (Fig. 15) Check that the beep signalreceived sound is heard from the second indoor unit (approximately 5 times). The sound you hear is the signal that the remote controller address has been changed. MODE FAN SPEED NIGHT SETBACK FLAP HIGH POWER TIMER (7) Finally press the remote controller ACL (reset) button to cancel the blinking op-7 display. (Fig. 15) Changing of the second remote controller address is now completed. CANCEL SENSOR ADR CLOCK F 12H 24H ACL ACL (Reset) button Fig

33 8-2. Disconnecting and Connecting Positive Connector for Outdoor Unit One of the two types of connectors illustrated at left is used. Their basic structure is the same for each. How to Disconnect Pull the cover upward Hold the resin connector cover, and pull the connector off. You cannot disconnect the connector by pulling the wire since it is locked inside. Always hold the cover to disconnect. (See illustration at left.) For the connector without the resin cover, push the lock in the direction of 2 while pulling it off. How to Connect In order to connect, hold the resin cover of the connector and push it in. Confirm the click sound for the inside lock. When the cover is pulled upward, the lock is released with the sequence of 1 and 2. 33

34 9. FUNCTIONS 9-1. Operation Functions Emergency operation Emergency operation is available when the remote controller malfunctions, has been lost, or otherwise cannot be used. To operate the system, press the OPERATION button, which is also used as the receiver, below the unit display. Each time this button is pressed, the OPERATION lamp changes color to indicate the type of operation. Select the desired type of operation. COOL HEAT STOP (GREEN) (RED) (Lamp Off) The set temperature is 2 C below the detected room temperature in the case of cooling operation, and 2 C above the room temperature in the case of heating operation. The flap and fan speed settings are AUTO. AUTO cooling/heating operation Selecting the operation mode When AUTO mode is selected, the microprocessor calculates the difference between the set temperature and the room temperature, and automatically switches to Cooling or Heating mode. Room temp. Set temp. COOL Room temp. Set temp. HEAT As shown by the example in the figure below, with AUTO cooling/heating operation, the mode changes between Heating and Cooling mode according to changes in the relationship between the current room temperature and the set temperature. Example Example of operation in AUTO mode with the set room temperature at 23 C. Room temp. Set temp. 23 Zone A Zone B Zone C Zone C SENSOR DRY During DRY operation, the system adjusts the room temperature and fan speed according to the conditions in the room, in order to maintain a comfortable room environment. SENSOR DRY operation DRY operation is as shown in the figure below. Load DRY A The compressor operation frequency varies. The indoor fan operates with 1/f fluctuation. DRY B COOL zone A zone B zone Conditions are monitored at all times when the room temperature is below 15 C. The compressor operates at a low operating frequency. The indoor fan operates with 1/f fluctuation. Monitor Monitoring operation takes place when the room temperature is below 15 C, or more than 3 C below the set temperature. When the monitoring range is entered, the compressor stops, and the indoor fan operates with 1/f fluctuation. PAM-α control In order to further improve inverter performance, control is switched between PWM control at low operation speeds, and PAM control at high operation speeds, making the most effective use of power. Zone B Zone A More than 1 hour Within 1 hour Compressor ON OFF ON OFF ON Operation mode Cooling Heating Cooling 34

35 HIGH POWER This function acts to raise the power but keeps the AC system in the same operating mode. This function is set with the HIGH POWER button on the remote controller. (It can be set regardless of the temperature and fan speed settings.) HIGH POWER operation from remote controller The unit operates at maximum output for 30 minutes, regardless of the desired temperature. The fan speed is 1 step above High. Lamp colors OPERATION lamp HEAT operation DRY operation COOL operation TIMER lamp QUIET lamp Red Orange Green Green Green Frequency MAX Timer backup Operation stops if there are no operator controls for 25 hours or longer after unit operation switched from OFF to ON by use of ON timer operation min. 5 min. Time Start End NOTE When HIGH POWER operation ends, the unit operates at low Hz for 5 minutes, regardless of the thermostat OFF conditions. When in DRY mode, operation is in the cooling zone. NIGHT SETBACK When NIGHT SETBACK operation is set, the temperature and fan speed settings will be adjusted automatically to allow comfortable sleep. When NIGHT SETBACK operation is set, mark appears on the remote controller. The main unit display lamp also becomes dimmer. COOL and DRY modes The indoor unit fan speed is automatically lowered for quiet operation. The temperature setting is raised by 1 C 30 minutes after NIGHT SETBACK operation is set. This repeats again after another 30 minutes have passed to gradually raise the temperature. HEAT mode The indoor unit and outdoor unit fan speeds are automatically lowered for quiet operation. The temperature setting is lowered by 2 C 30 minutes after NIGHT SETBACK operation is set. This repeats again after another 30 minutes have passed to gradually lower the temperature. 35

36 9-2. Protective Functions Overload prevention during heating During HEAT operation, the temperature of the indoor heat exchanger is used to control the frequency and lessen the load on the compressor before the protective device is activated. Cold-air prevention during heating During heating, the fan speed is set to LL (very low) or stopped. As the temperature of the indoor heat exchanger rises, the fan speed is changed to the set speed. Indoor heat exchanger temperature ( C) Indoor heat exchanger Approx. A High A. Control start 53 Normal operation B. Control end Approx. 47 a b c d B Set fan speed At start of operation a Area: Automatic capacity control b When Point A has been exceeded, the operation frequency is reduced by a certain proportion. c Area: Frequency increase is prohibited. d At Point B and below, overload prevention is ended and control is the same as in the a area. Freeze prevention During COOL or DRY operation, freezing is detected and operation is stopped when the temperature of the indoor heat exchanger matches the conditions below. 1 Freeze-prevention operation is engaged when the temperature of the indoor heat exchanger is below 6 C. 2 Restart after freeze-prevention operation occurs when the temperature of the indoor heat exchanger reaches 8 C or above. Indoor heat exchanger temperature ( C) * A a b c d a Area: Automatic capacity control b When the temperature drops below Point A, the operation frequency is reduced by a certain proportion. c Area: Frequency increase is prohibited. d When the temperature reaches Point C or above, freezing prevention is ended and control is the same as in the a area. * When the temperature drops to below 2 C (continuously for 2 minutes or longer), the compressor stops. Once the freeze condition is detected, the air conditioner will work less than the maximum frequency until it is turned off. B C LL Stopped Approx. 40 Indoor heat exchanger temperature ( C) NOTE The fan speed is forcibly changed to LL beginning 30 seconds after the thermostat turns OFF. Normal operation refers to operation when the room temperature has approached the set temperature. When HEAT operation starts, the indoor fan is stopped until the temperature of the indoor heat exchanger reaches 20 C or higher, or until the room temperature reaches 15 C or higher. Compressor discharge temperature control This function controls the operation frequency to prevent the compressor discharge temperature from rising more than a specified temperature. Compressor discharge temperature ( C) Approx. 101 Approx. 94 A a b c d a Area: Automatic capacity control. b When the temperature rises above Point A, the operation frequency is reduced at a specified rate. c Area: Further frequency increase is prohibited. d When the temperature falls below Point B, prevention of a rise in frequency is released and the air conditioner operates as in a area. * The compressor will stop if the temperature of the compressor discharge exceeds 120 C due to shortage of gas or other reason. B 36

37 Defrost detection and release Reverse-Cycle Defrosting Outdoor fan ON 4-way valve ON Defrosting Sequence Heating operation Frost sensing Defrost detection occurs in either of the following cases: The temperature of the heat exchanger remains at or below the L1 line for 3 minutes after the start of HEAT operation. The temperature of the heat exchanger remains at or below the L2 line for 120 minutes after the start of HEAT operation. Outdoor heat exchanger temp. 0 Ambient temp. CT (Peak current cut-off control) This function prevents the circuit breaker or fuse from operating to open the circuit. This function works when electrical current has increased due to an increase in the cooling / heating load, or to a decrease in the power supply voltage. In these cases, operation frequency is reduced or operation is interrupted automatically to control the electrical current for operation. When the cause of the increase in electrical current is rectified, the system will resume operation in the original mode. SAP-KRV93, KRV123 (A) Cooling Dry Heating Peak current cut-off trips 12.0 Hz down NOTE Electrical current setting for COOL operation is used during DEFROST operation. L2 L1 Frosting area Reverse-cycle defrosting operation Compressor 1 minute after it is stopped, compressor is ON. Outdoor fan OFF Indoor fan OFF 4-way valve OFF Operation lamp Repeatedly switches between red and orange illumination. Releasing of defrosting Outdoor heating exchanger temp. is over 14 C. Defrosting operation lasts 12 minutes (maximum). 2 minutes after it is stopped, compressor is ON. 4-way valve is ON. Outdoor fan is ON. NOTE If the air conditioner is turned off during the defrosting cycle, it will continue defrosting and turn itself off after defrosting is completed. 37

38 10. TROUBLESHOOTING Precautions before performing inspection or repair After checking the self-diagnostics monitor, turn the power OFF before starting inspection or repair. High-capacity electrolytic capacitors are used inside the outdoor unit controller (inverter). They retain an electrical charge (charging voltage DC 310 V) even after the power is turned OFF, and some time is required for the charge to dissipate. Be careful not to touch any electrified parts before the controller LED (red) turns OFF. If the outdoor controller is normal, approximately 30 seconds will be required for the charge to dissipate. However, allow at least 5 minutes for the charge to dissipate if there is thought to be any trouble with the outdoor controller. < Clock display > Test run mode AIR CONDITIONER Self-diagnostics mode Method of self-diagnostics Follow the procedure below to perform detailed trouble diagnostics. NOTE QUIET button UIET ON EI/OFF E ON/OFF operation button 1: If the operation lamp blinks every 0.5 seconds immediately when the power is turned ON, there is an external ROM (OTP data) failure on the indoor circuit board, or a ROM socket insertion problem, or the ROM has not been installed. 1HR. TEMP. 1HR. TIMER button 2: The failure mode is stored in memory even when the power is not ON. Follow the procedure below to perform diagnostics. MODE FAN SPEED NIGHT SETBACK Executing self-diagnostics FLAP TIMER HIGH POWER After turning on power to the air conditioner, use the remote controller and follow the steps below to execute self-diagnostics. Step 1: Press and hold the remote controller QUIET button and 1 HR TIMER button. At the same time, press the ACL (reset) button. Use a pointed object such as the tip of a pen to press the ACL button. When this has been done, op-1 (test run) appears, blinking, in the remote controller clock display area. Step 2: Next, press the 1 HR TIMER button once to change the display from op-1 to op-3 (self-diagnostics). (The display continues to blink.) Step 3: Finally press the ON/OFF button to engage self-diagnostics mode. CANCEL SENSOR ADR CLOCK F 12H 24H ACL ACL (Reset) button The self-diagnostics function utilizes the 3 indicator lamps on the main unit, in combinations of ON lamps, blinking lamps, and OFF lamps, to report the existence of sensor trouble or a protective operation. (The lamps blink or remain ON for 5 seconds, then turn OFF for 2 seconds.) Self-diagnostics is completed when the buzzer sounds 3 short beeps. A maximum of 3 self-diagnostics reports are displayed, for 5 seconds each, beginning with the most recent report. Following this display the lamps turn OFF. In order to view the self-diagnostics results again, press the ON/OFF button again. The 3 lamps remain OFF if no trouble has occurred. <IMPORTANT> After self-diagnostics is completed, be sure to press the ACL (reset) button to return to normal mode. The air conditioner will not operate if this is not done. 38