Commercial Air Conditioning SERVICE MANUAL 3U24GS1ERE 4U36GS1ERE. Edition: SYJS REV.B. Contents

Transcription

1 Commercial Air Conditioning SERVICE MANUAL Contents 3U24GS1ERE 1. Specification 2. Dimension 3. iring diagram 4. iring connection 5. Refrigerant diagram 6. Limitation values on pipe instalaltion 7. Sound pressure level 8. Instalaltion 9. Outdoor unit PC photo, dip switch setting and function 10. Diagstic code 11. Trouble shooting 4U36GS1ERE SYJS REV. Edition:

2 Contents 1. Specification Dimension 3 3. iring diagram 4 4. iring connection 6 5. Refrigerant diagram 7 6. Limitation values on pipe instalaltion 9 7. Sound pressure level Instalaltion Outdoor unit PC photo, dip switch setting and function Diagstic code Trouble shooting...38 APPENDIX Sensor Resistance Table...42

3 1. Specification item model 3U24GS1ERE Function Cooling Heating Rated capacity TU Rated power input (indoor + outdoor) Rated current input (indoor + outdoor) A EER TU/ 10.0 SEER / HSPF TU/ Minimum capacity TU Minimum power input Maximum capacity TU Maximum power input (indoor + outdoor) Power source 1PH, 208/230V~, 60Hz Max.Running current (indoor + outdoor) A / A Fuse size (recommended size) A 25 Comp Model SN172FJGMC Compressor Oil charge and type 600CC, FV 50S Type Twin Rotary (DC inverter) Number 1 Type Number Axial 1 Fan Speed r/min High 820 Motor output/input power 80/100 Air-flows (H/M/L) CFM(m³/h) about 1470 (2500) Type / Diameter in(mm) TP2M /0.31(7.94) Heat exchanger row 2 Face area in²(m²) about 5.6 (0.52) Outdoor unit Dimension (xdxh) External in(mm) 37/13.6/28.7(940/345/730) Package in(mm) 39.6/16.7/32(1005/423/815) Refrigerant control method PMVs Defrosting method/ Automatic by reversible cycle Crankcase heater power NONE Noise level Sound pressure level d(a) 54 eight Net / Shipping Ib (kg) 117(53)/123(56) Type / Charge OZ(kg) R410A / 74 (2.1) Refrigerant No need to recharge ft(m) 98.4(30) Recharge OZ/ft(g/m) 0.2(20) Pipe Liquid in(mm) 3* Φ1/4(6.35) Gas in(mm) 3* Φ3/8(9.52) Connecting method Flared Drop between IU & OU ft(m) 24.6ft(7.5m) Piping length between IU & OU ft(m) 32.8ft(10m) Total liquid piping length ft(m) 98.4ft(30m) Drop between indoor units ft(m) 3.3ft(1m) etween I.D &O.D Max.Drop between IU &OU ft(m) 50ft(15m)(indoor unit lower than outdoor unit) Max.Drop between IU & IU ft(m) 50ft(15m)(indoor unit higher than outdoor unit) Max.Drop between indoor units ft(m) 16.5ft(5m) Max.Piping length between IU & OU ft(m) 82ft(25m) Max.Total length ft(m) 197ft(60m) working temperature Cooling ( ) (-10~46) Heating ( ) 5-75(-15~24) Piping 1. The above performance data are from the combination of 3U24GS1ERE+3*HSU109VHG-G. 2. Large drop and long piping installation will obviously reduce the total capacity. 1

4 Outdoor unit Item Model 4U36HS1ERE Function Cooling Heating Rating capacity TU Rated power input (indoor + outdoor) Rated current input (indoor + outdoor) A EER TU/ 9.4 SEER / HSPF TU/ Minimum capacity TU Minimum power input Maximum capacity TU Maximum power input (indoor + outdoor) Power source 1PH, 208/230V~, 60Hz Max.Running current (indoor + outdoor) A / A Fuse size (recommended size) A 25 Model / Manufacture TN220FLHMC Compressor Oil charge and type 870CC/ FV50S Type Twin Rotary (DC inverter) Number 1 Type Number Axial 1 Fan Speed r/min High 860 Motor output/input power 100/125 Air-flows (H/M/L) CFM(m³/h) about 2059 (3500) Type / Diameter in(mm) TP2M / 0.28 (7.0) Heat exchanger row 3 Face area in²(m²) about 8 (0.75) Dimension External in(mm) 37.3/13.4/33(948/340/840) (xdxh) Package in(mm) 41/17/39.4(1040/430/1000) Refrigerant control method PMVs Defrosting method Automatic by reversible cycle Piping Crankcase heater power/ NONE Sound pressure level d(a) 56 eight Net / Shipping Ib (kg) 168(76)/192(87) Type / Charge OZ(kg) R410A / 113 (3.2) Refrigerant Pipe No need to recharge ft(m) 131(40) Recharge OZ/ft(g/m) 0.2(20) Liquid in(mm) 4* Φ1/4 (6.35) Gas in(mm) 3* Φ3/8(9.52)+1*Φ1/2(12.7) Connecting method Flared etween I.D &O.D Drop between IU & OU ft(m) 24.6ft(7.5m)(outdoor unti is lower than anyone indoor unti) Piping length between IU & OU ft(m) 32.8ft(10m) Total liquid piping length ft(m) 131ft(40m) Drop between indoor units ft(m) 3.3ft(1m) Max.Drop between IU &OU ft(m) 50ft(15m)(indoor unit lower than outdoor unit) Max.Drop between IU & IU ft(m) 50ft(15m)(indoor unit higher than outdoor unit) Max.Drop between indoor units ft(m) 16.5ft(5m) Max.Piping length between IU & OU ft(m) 82ft(25m) Max.Total length ft(m) 227ft(70m) Cooling ( ) (-10~46) working temperature Heating ( ) 5-75(-15~24) 1. The above performance data are from the combination of 4U36HS1ERE+4*HSU109VHG-G. 2. Large drop and long piping installation will obviously reduce the total capacity. 2

5 2. Dimension 3U24GS1ERE Air inlet 16.5 Air inlet Air outlet Handle Handle Liquid pipe:1/4(flared) 6.35 A unit connection Gas pipe :3/8(flared) 9.52 Liquid pipe:1/4(flared) 6.35 Gas pipe unit connection Liquid pipe:1/4(flared) 6.35 Gas pipe :3/8(flared) 9.52} C unit connection } } U36HS1ERE Air inlet Air inlet Air outlet Gas pipe 3/8(flared) Ø0.385(A,,C unit) 1/2(flared) Ø0.5 (D unit) Handle Handle Indoor and outdoor connect wiring hole (30*48) Handle A unit connection unit connection C unit connection D unit connection Liquid pipe 1/4(flared) Ø0.25 3

6 3. iring diagram 3U24GS1ERE 4-AY VALVE ACN ACL CN11 CN5 FUSE 250VAC T3.15A CN9 Toci S3 S4 S2 S1 CN7 CN6 ELECTRONIC CONTROL UNIT CN14 Tc Ts Y/G Reactor L Capacitor - R P2(N) ACN FUSE T25A 250VAC POER CIRCUIT OARD RO RI S6 ON S5 ACL ON N(-) + P(+) Ta LED_R MODULE Td LED_G Te U V L N 3 4 Power CN2 CN10 CN3 CN4 CN21 CN7 CN23 CN6 CN12 Tm Y/G P1(L) CN1 RL1 M DC-FAN MOTOR CN5 CN8 CN17 CN18 CN16 CN15 L Y R OR: Orange : lack L: lue R: Red Y/G: Yellow/Green : hite R:rown GR:Green Y:Yellow Toci: Coil Piping Temp. Sensor Tc: Condensing Temp. Sensor Ts: Compressor Suction Temp. Sensor Ta: Ambient Temp. Sensor Td: Compressor Discharge Temp. Sensor Te: Defrosting Temp. Sensor Tm: Module Temp. Sensor R GR CN13 CN12 R R P6 P4 P5 P3 P7 Definition of S OFF OFF OFF OFF ON OFF OFF OFF ON ON ON ON Centralized Control Address=1 Address= Address=16 Y/G ON S CN2 CN CN31 CN26 CN30 CN25 CN29 CN A Center Controller R L Y L R R L OR Y R L OR Y R L OR Y R L OR Y M R R OR OR R R R GR GR GR GR R R M M M *The dashed part is optional. R L CRANKCASE HEATER OR CON9 CON8 R R V U S1 ON CN R CN1 COMPRESSOR Definition of S1 State when out of factory (Normal Operating) Compulsive Heating R R R Compulsive Cooling Rated Operating OFF OFF OFF OFF ON OFF OFF OFF OFF ON OFF OFF OFF OFF ON OFF Y/G Y/G OFF OFF OFF ON Time Defrost Valid Definition of S5 & S7 To Indoor Units C To Indoor Units To Indoor Units A 3U24GS1ERE ON S ON S

7 4U36HS1ERE MODULE Toci Tc Ts Ta Td Te R V U LP HP COMPRESSOR Definition of S1 S1-1 S1-2 S1-3 S1-4 State when out of factory OFF OFF OFF OFF (Normal Operating) ON OFF OFF OFF OFF ON OFF OFF OFF OFF ON OFF Compulsive Heating Compulsive Cooling Rated Operating OFF OFF OFF ON Time Defrost Valid DC-FAN MOTOR M CRANKCASE HEATER 4-AY VALVE FG Vsp Vcc CN9 TO Module CN7 CN14 CN13 CN12 CN15 GR GND CN11 S1 CN16 L Vdc S2 ON S S3 S4 CN27 D-TC1 CN32 D-TC2 GR CN26 C-TC1 CN31 C-TC2 GR CN25 -TC1 CN30 -TC2 GR CN24 A-TC1 CN29 A-TC2 GR CN17 Y CON ELECTRONIC CONTROL UNIT LED_R CN18 R CON9 ON S6 ON S5 CN19 LED_G CN5 CN2 FUSE 250VAC T3.15A CN6 CN21 CN23 CN8 ACN ACL R M M M M M To Center Controller C1 C2 A CN2 CN3 ON S1 CN CN R R R Y/G Y/G Y/G R Y/G To Indoor Units A To Indoor Units To Indoor Units C To Indoor Units D Y/G P1(L) FUSE P2(N) T25A 250VAC P6 P4 P5 P3 RL1 P7 POER CIRCUIT OARD L N Y/G Power Definition of S OFF OFF OFF OFF ON OFF OFF OFF ON ON ON ON Centralized Control Address=1 Address= Address=16 OR: Orange : lack L: lue GR:Green R: Red Y/G: Yellow/Green : hite Y: Yellow R: rown Toci: Coil Pipe Temp. Sensor Tc: Condensing Temp. Sensor Ts: Compressor Suction Temp. Sensor Ta: Ambient Temp. Sensor Td: Compressor Discharge Temp. Sensor Te: Defrosting Temp. Sensor Tm: Module Temp. Sensor Tc1-a-b-c-d-e:Condensing Temp. Sensor for Indoor Units a/b/c/d/e (Gas Pipe) Tc2-a-b-c-d-e:Condensing Temp. Sensor for Indoor Units a/b/c/d/e (Liquid Pipe) *The dashed part is optional CN4 Reactor CN3 CN7 CN6 CN5 CN2 CN1 CN9 Tm GR CN11 Definition of S5 & S7 ON S ON S U36HS1ERE R R R R L Y R R R R L OR Y R L OR Y R L OR Y R L OR Y R L OR Y R R R R CN

8 4. iring connection 6

9 4-way valve OFF ON Indoor heat exchanger temp. sensor FAN-IN Indoor ambient temp. sensor coil: R efrigerant R efrigerant Indoor Indoor Indoor unit A unit unit C Indoor Indoor Indoor unit unit unit A C Unit Unit Unit A liquid pipe C Gas Gas Gas stop vavle stop vavle stop vavle liquid pipe liquid pipe temp. temp. temp. Unit temp. Unit temp. Unit pipe sensor sensor sensor C temp. A gas pipe sensor gas pipe sensor gas sensor S trainer S trainer S trainer EEV A EEV EEV C Oil separator Compressor Discharge sensor E E V O Check valve temp. Outdoor heat exchanger temp. sensor Accumulator S trainer Distributor 5. Refrigerant diagram 3U24GS1ERE Outdoor ambient temp. sensor Defrost temp. sensor 4 -way valve Coil pipe temp.sensor Toci Low pressure switch S uction temp. sensor φ2.7*φ1.0*55in Capillary tube High pressure switch Liquid stop vavle Liquid stop vavle Liquid stop vavle flow in heating flow in cooling 7

10 EEV A E E V 4U36HS1ERE Unit D liquid pipe temp. sensor Strainer EEV D Indoor unit D Unit C liquid pipe temp. sensor Strainer EEV C Indoor unit C Indoor unit Unit liquid pipe temp. sensor Strainer Indoor unit A Unit A liquid pipe temp. sensor Strainer Indoor ambient temp. sensor FAN-IN Indoor unit D Unit D gas pipe temp. sensor Indoor heat exchanger temp. sensor Indoor unit C Unit C gas pipe temp. sensor Indoor unit Unit gas pipe temp. sensor Indoor unit A Unit A gas pipe temp. sensor 4-way valve coil: OFF Refrigerant flow in cooling ON Refrigerant flow in heating High pressure switch Oil separator Compressor Suction temp. sensor Discharge temp. sensor Capillary tube Low pressure switch Accumulator Gas stop valve 4-way valve Pipe sensor Toci 5/8 Outdoor heat exchanger temp. sensor Liquid stop vavle EEV O 3/8 Strainer Receiver Check valve φ2.7*φ1.0*55in FAN-OUT Outdoor ambient temp. sensor Defrost sensor Distributor 8

11 6. Limitation values on pipe installation 3U24GS1ERE Item unit Description Standard Maximum A,,C liquid pipe inch Size of the liquid side connection pipe Φ0.25 / A,,C gas pipe inch Size of the gas side connection pipe Φ0.375 / L1(one way) ft Max.piping length between IU and OU of the way L2(one way) ft Max.piping length between IU and OU of the way L3(one way) ft Max.piping length between IU and OU of the way L1+L2+L3 ft Total liquid piping length ft Drop between every two indoor units when the location of the outdoor unit is among indoor units h Drop between every two indoor units when the ft location of the outdoor unit is at one side of indoor units H+ ft Drop between the outdoor unit and the indoor unit ft Drop between the outdoor unit and the indoor unit when the location of outdoor unit is among the H- ft indoor units Drop between the outdoor unit and the indoor unit when the location of outdoor unit is at one side of indoor units

12 4U36HS1ERE Item unit Description Standard Maximum A,,C liquid pipe inch Size of the liquid side connection pipe Φ0.25 / A,,C gas Item pipe inchunitsize Description of the gas side connection pipe Φ0.375 Standard Maximum / D gas pipe A,,C, Dliquid pipe inch Size of the liquid side connection pipe Φ0.5 φ 0.25 / L1(one way) A,,C Gas pipe ft inch Max.piping Size of the gas length side connection between pipe IU and OU of the way 3.1 φ / L2(one way) ft Max.piping length between IU and OU of the way D Gas pi[pe inch Size of the gas side connection pipe φ 0.5 / L3(one way) L1 (one way) ft inchmax.piping length length between between IU and IU OU and of the OU way of the way L3(one way) ft Max.piping length between IU and OU of the way L2 (one way) inch Max.piping length between IU and OU of the way L3 (one way) inch Max.piping length between IU and OU of the way L1+L2+L3+L4 ft Total liquid piping length h L4 (one way) inch Max.piping length between IU and OU of the way Drop between every two indoor units when the L1+L2+L3+L4 Total liquid piping length ft inch location Drop between of the every outdoor two indoor unit units is among when the indoor location of units inch Drop the outdoor between unit is every among two indoor indoor units units when the h ft location Drop between of the every outdoor two indoor unit units is at when one the side location of of indoor inch the outdoor unit is at one side of indoor units units H+ H+ ft inchdrop between the the outdoor outdoor unit and unit the and indoor the unitindoor unit Drop between the the outdoor outdoor unit and unit the and indoor the unit indoor when theunit inch location of outdoor unit is among the indoor units H- ft when the location of outdoor unit is among the Drop between the outdoor unit and the indoor unit when the H- inchindoor units location of outdoor unit is at one side of indoor units Drop between the outdoor unit and the indoor unit ft when the location of outdoor unit is at one side of indoor units 10

13 7. Sound level Test method 1. Set the unit: 1) the unit is placed on the rubber whose thickness is 5mm; 2) if the height between the air outlet and ground is less than 1m, block the unit up to 1m.far from ground 2. Test position: After setting the unit,the test position for the ise is 1m far from the front panel 11

14 Sound pressure level---3u24gs1ere third octave band frequency (Hz) Sound pressure leve-4u36hs1ere cooling high heating high third octave band frequency Hz cooling high cooling med cooling low fan high fan med fan low heating high heating med heating low sound pressure level D sound pressure level d(a) 12

15 8. Installation 13

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28 9. Dip switch setting, outdoor unit PC photo, and function 9.1 Dip swith setting and Outdoor unit PC photo Model PC Power module Filter board 3U24GS1ERE 4U36HS1ERE Dip switch setting Outdoor main PC dip switch setting S5 definition Decription ON Cooling only OFF Heating pump(default) --- ON set ON if frost easily --- OFF set OFF if hard to frost(default) ON Max.running current is 15A OFF Normal control(default) OFF ON OFF U ON OFF ON U ON --- temperature correction valid OFF --- temperature correction null(default) ON Quiet operation valid OFF Quiet o poperationeration vaild(default) S6 : outdoor central control address setting outdoor central control address OFF OFF OFF OFF 1 OFF OFF OFF ON 2 OFF OFF ON OFF 3 ON ON ON ON 16 S7: pre-set dip switch Small service PC: dip switch setting S1 definition: Definition OFF OFF OFF OFF State when out of factory ON OFF OFF Compulsive heating: 50Hz, outdoor motor 5-class, standard open angle 200, the OFF others are rmal OFF ON OFF Compulsive cooling: 60Hz, outdoor motor 7-class, standard open angle 200, the OFF others are rmal OFF OFF ON OFF Rated operation OFF OFF OFF ON Time defrost valid ON ON ON ON Detection for wrong wiring 26

29 PC( ) S06 PC ( ) S05 S06 27

30 Power module( ) Power module( ) 28

31 Filter board( ) 29

32 Dip switch setting Outdoor main PC dip switch setting S5 definition Decription ON Cooling only OFF Heating pump(default) --- ON set ON if frost easily --- OFF set OFF if hard to frost(default) ON Max.running current is 15A OFF Normal control(default) OFF ON OFF U ON OFF ON U ON --- temperature correction valid OFF --- temperature correction null(default) ON Quiet operation valid OFF Quiet o poperationeration vaild(default) S6 : outdoor central control address setting outdoor central control address OFF OFF OFF OFF 1 OFF OFF OFF ON 2 OFF OFF ON OFF 3 ON ON ON ON 16 S7: pre-set dip switch Small service PC: dip switch setting S1 definition: Definition OFF OFF OFF OFF State when out of factory ON OFF OFF Compulsive heating: 50Hz, outdoor motor 5-class, standard open angle 200, the OFF others are rmal OFF ON OFF Compulsive cooling: 60Hz, outdoor motor 7-class, standard open angle 200, the OFF others are rmal OFF OFF ON OFF Rated operation OFF OFF OFF ON Time defrost valid ON ON ON ON Detection for wrong wiring 30

33 9.2 Outdoor unit control Outdoor frequency control A. Compressor running frequency range: 20~95RPS Electronic expansion valve (EEV) control A: EEV specification Max. open angle Driving speed 500 pulse PPS : Start-up control In Cool/Dry mode, standard open angle: outdoor ambient temp. 68 O F, 250 pulse(e);outdoor ambient temp.<68 O F, 210 pulse(e); In Heat mode, standard open angle: outdoor ambient temp. 50 O F, pulse (E);outdoor ambient temp.<50 O F, 210 pulse (E). E: In order to cooperate the compressor discharging temp. over high protection, the system will enlarge the EEV open angle. ithin 5 minutes after compressor starts up, it will t modify. The detecting period is 30 seconds. Cooling mode Indoor modification angle 212 O F<discharging temp. +50 degree/30seconds, it will stop until up to the max. permitted opening angle 194 O F< discharging temp.<=212 O F EEV hold control <=194 O F -5 degree/30seconds, and reduce to 0 degree gradually Heating mode Indoor modification angle 212 O F<discharging temp. +50 degree/30seconds, it will stop until up to the max. permitted opening angle 212 O F< discharging temp.<=212 O F Keep the angle <=194 O F -5 degree/30seconds, and reduce to 0 degree gradually way valve control in heating Protection when 4-way valve can t reverse in heating: 10 minutes later after compressor startup, if indoor coil average temp. is below 59 O Fand keeps for 1 minute, the unit will stop and occur the 4-way valve protection. compressor ON OFF 4-way valve ON OFF 15 S(E ) 2 minutes and 55s 31

34 9.2.4 Electric heater control If compressor has t run for a long time, the refrigerant will remain on the bottom of compressor and mix with the refrigeranr oil. hen re-startup, because low pressure reduces, refrigerant will be migrated from the refrigerant oil and cause foam in the oil, this can cause oil be pumped out of compressor. Therefore please stop heating the compressor bottom to ensure the low pressure in startup period should t go down greatly. Ambient temp. TA 80.6 O F, when compressor stops, the electric heater will be electrified. hen TA 89.6 O F, or compressor running, the electric heater will be off Control of defrosting in heating In heating mode, defrosting temp. sensor will check the frosting condition of outdoor heat exchanger and make defrosting control. A: Enter condition: a. In heating mode, if the compressor has run for 10 minutes contiusly and run for 45 minutes in all, the system will measure the defrosting temperature sensor Te and outdoor ambient temp. sensor TA, if the below condition can be met for contius 5 minutes, the unit will enter defrosting operation: Te C TA-α Herein: C: TA<32 O F=0.8 TA 32 O F, C=0.6 According to S5-2, the setting is as follow: in the place easy to frost, it is H; when out of factory, it is M. Jumper selection M(out of factory) H Heater ON OFF Ambient temp. TA( ) α( O F) 8(E) 6(E) b. Defrosting entering condition: 5 O F C TA-α 28.4 O F; c. Stop and Pause condition of compressor running accumulative time in heating mode: Checking Stop: running operation changes from heating to cooling. Checking Pause: thermostat OFF, or the unit stops. Cancel condition: It will take the max. 10 minutes from beginning defrosting to quit it. Te sensor will measure the condition of outdoor heat exchanger, if the temp. is over 44.6 O F for 60 seconds in all or is up to 53.6 O F for 30 seconds in all, the defrosting will be over Compulsory defrosting control Enter condition: in heating mode, after receiving the compulsory defrosting signal from indoor unit, the unit will perform the compulsory defrosting operation. Cancel condition: Te 53.6 O F and keep for 1 minute or the defrosting time is over 10 minutes. The manual defrosting signal of indoor unit will remain until the outdoor enters defrosting mode. Note: hen outdoor compressor t running, the unti still can enter manual defrosting, but it will comply with the 3-minute protection of compressor. 32

35 9.2.6 Defrosting operation flow chart: beginning end fixed frequency indicated FQY 60s defrosting FQY 80 Hz(E ) 60s soft startup compressor 0HZ 0HZ 5s outdoor motor ON send defrosting signal to indoor Auto OFF 4-way valve ON OFF 15s 450-pulse 450-pulse 350-pulse(E) all EEVs auto open angle auto open angle all indoor motors ON OFF anti-cold air fun ction 33

36 9.2.7 Frequency control when compressor discharge temp.(td) is too high Purpose: make compressor frequency control if the discharging temp. is too high, to lower the discharging temp. efficiently and ensure the system can run rmally. Multi: Discharging temp. TD If keeping for 10s, the unit stops, 3 minutes later, the unit can re-startup. If in 60 minutesthe unit occurs alarm for 3 times, the failure can be eliminated. Reduce FQY rapidly 2HZ/S Reduce FQY rapidly 1HZ/S Reduce FQY slowly 1HZ/10S Remain FQY Increase FQY slowly 1HZ/10S 34

37 I 0.95I 0.93I 0.90I 0.88I 0.85I Stop immediately, if abrmal stop 3 times in 1 hour, the unit will stop and alarm. Reduce FQY rapidly 2HZ/S Reduce FQY rapidly 1HZ/S Reduce FQY slowly 1HZ/10S Remain FQY Increase FQY slowly 1HZ/10S hen the input signal of pressure switch is low level: 0 for 1 minute, that shows high pressure code to indoor. Meanwhiel, by controling the max. condensating temp.tc(cooling) or module temp. sensor(tmave), please confirm as follow Condensing temp Keep for 5 seconds, stop to alarm, after 3-minute standby, the unit can restartup. In 60 minutes it occurs 3 times contiusly, unit will stop to alarm and the failure can be resumed after being electrified again. Reduce FQY rapidly 2HZ/S Reduce FQY rapidly 1HZ/S Reduce FQY slowly 1HZ/10S Remain FQY 140 Increase FQY slowly 1HZ/10S (1) hen compressor is running, if output signal of low pressure switch is low level: 0 for 1 (2) hen compressor running, if output signal of low pressure switch is low level: 0 for 30 35

38 hen unit stops, the reason that system still checks the low pressure : in a long time stop, make protection for the compressor on the condition of great refrigerant leakage. The reason that low pressure switch action time is 30 seconds: when compressor stops, low pressure does t change, so it will be shorter than the set time in operation. (3) hen compressor starts up, in 8 minutes, low pressure switch signal will be shielded. (4) In defrosting, low pressure switch will be shielded. (5) In oil return procedure, low pressure switch will be shielded. (6) In the refrigerant discharging procedure after the oil return in cooling is over, low pressure switch will be shielded. In addition, the system will control low pressure through the evaporator temp. TE to realize the low pressure protection function. In cooling, confirm through Tc2AVE: -13 Normal operation TinAVE Min. running FQY 20HZ SV2 OFF & 20HZ SV2 ON & 20HZ Keep for 5 seconds, unit stops and alarm occurs. 3 minutes later, restart up. If it occurs 3 times in 1 hour, it will always alarm and stop, electrify again and failure will be cleared. In heating, confirm through defrosting temp. Te: Te Normal operation Min. running FQY 20HZ SV2 OFF & 20HZ SV2 ON & 20HZ Keep for 5 seconds, unit stops and alarm occurs. 3 minutes later, restart up. If it occurs 3 times in 1 hour, it will always alarm and stop, electrify again and failure will be cleared. If the failure is t confirmed as the permanent protection, outdoor will t send failure code to indoor, and indoor will t alarm. 36

39 10. Diagstic code 3U24GS1ERE 4U36HS1ERE PRODUCT DIAGNOSIS PROCEDURE Malfunction Diagsis Code 1 Faulty of outdoor unit EEPROM 2 IPM overcurrent or short circuit 4 Communication failure between Module and ECU 5 Module operated overload 6 8 Module low or high voltage Discharging temperature overheating.lack of refrigerant, ambient temperature too high or PMVs blocked. 9 Malfunction of the DC fan motor 10 Malfunction of defrosting temp. sensor 11 Malfunction of compressor suction temp. sensor 12 Malfunction of ambient temp. sensor 13 Malfunction of compressor discharge temp. sensor 15 Communication failure between indoor&outdoor unit 16 Lack of refrigerant or discharging 17 4-way valve switching failure 18 Loss of synchronism detection 20 Indoor thermal overload 21 Indoor frosted Module thermal overload Compressor start failure Module input overcurrent 26 MCU reset Module input current detect circuit malfunction Malfunction of liquid pipe temp. sensor for indoor unit A 29 Malfunction of liquid pipe temp. sensor for indoor unit 30 Malfunction of liquid pipe temp. sensor for indoor unit C 31 Malfunction of liquid pipe temp. sensor for indoor unit D 32 Malfunction of gas pipe temp. sensor for indoor unit A Malfunction Code Diagsis using the Numeral Light Indicator Diagsis Malfunction of gas pipe temp. sensor for indoor unit Malfunction of gas pipe temp. sensor for indoor unit C Malfunction of gas pipe temp. sensor for indoor unit D Malfunction of gas pipe temp. sensor for indoor unit E Precautions For Adding Refrigerant 1.This system must use refrigerant R410A. 2.Add refrigerant 20g per meter when the total piping length exceeds the standard value,but make sure that the total liquid piping length should be less than the max value. 38 Malfunction of module temp.sensor Momentary power failure detection Malfunction of condensing temp. sensor Malfunction of liquid pipe temp. sensor for indoor unit E Malfunction of Toci temp. sensor Outdoor Unit Std. Value Max Value 3U24GS1ERE 30m/98ft. 60m/197ft. 4U36HS1ERE 40m/131ft. 70m/227ft. 42 System high pressure switch off 43 System low pressure switch off 44 System high pressure protection.refrigerant overabundance,high condensing temp. or malfunction of fan motor. 45 System low pressure protection.refrigerant shortage, Low defrosting temp., or malfunction of fan motor. Definition of S1 on Malfunction Display Definition OFF OFF OFF OFF ON OFF OFF OFF OFF ON OFF OFF OFF OFF ON OFF Rated Operating OFF OFF OFF ON Time Defrost Valid State when out of factory (Normal Operating) Compulsive Heating:Frequency 50HZ; PMV 200 pulse;class 5 of outdoor fan motor. Compulsive Cooling:Frequency 60HZ; PMV 200 pulse;class 7 of outdoor fan motor. Notes: 1.hen using this product,you need t to set the address.ut the L/N wires between indoor & outdoor units must be corresponded,or there will be communication failure. 2.Quiet Operation Setting.Set the DIP 8 to ON position of S5,the system will run with lower ise,but the max capacity will also reduce slightly. 3.Do NOT change the settings of other switchs,wrong settings can make the system damage or other malfunctions. 4.For some malfunctions, this system can make back up running. * ECU:Electronic Control Unit * MCU:Micro Control Unit * PMV:Pulse Modulated Valve

40 11. Trouble shooting Trouble 1: No display on the operation panel start check if display panel and the unit matched well replace display panel and check again yes if the red diode and green diode on indoor PC flash in turn if the power terminal block is 220V input check the terminal block and the power supply yes yes PC is faulty, replace it check if display panel is 12V power supply check if power wiring is in open circuit check if fuse is burnt PC is faulty, replace yes yes yes display panel circuit is damaged, replace it replace power wiring and check again replace the fuse and check again Trouble 2: Sensor failure start as per the wiring diagram,check the connection between sensor and PC is correct yes re-fix the sensor and check again check if sensor is in open circuit or PC port is t in good condition check if sensor resistor value is correct replace sensor and check again yes yes replace sensor and check again PC is faulty and repalce it, check again 38

41 Trouble 3: Communication failure between indoor and outdoor start as per the wiring diagram, check if communication wiring is correct re-wiring, and check again yes check if the communication port connecting to the indoor/outdoor PC is in open circuit if the power cable and the communication wire are too close, resulting in the wrong commission data PC is faulty, replace and check again yes yes replace the communication connection wire, check again adjust the distance and check again Trouble 4: Indoor PC EEPROM data is wrong 1.If the failure occurs when being electrif ied for the first time, that shows EEPROM (8-bit pin) t fixed firmly or damaged. 2.If the failure occurs when running, that shows EEPROM is faulty and need to be replaced. Trouble 5: Indoor repeated unit number 1.Firstly query the unit number: switch off the unit, press SLEEP for about 15 seconds until the buzzer sounds 5 times, on the display panel there will be digit, which is indoor numbe r. y this method,you can check if there is repeated unit number, if yes, please re-set the number as per the unit number setting procedure. 2.Re-set the unit number directly, the unit with outdoor pipe A is No. 1; the unit with outdoor pipe is No. 2; the unit with pipe C is No.3 Trouble 6: Indoor fan motor failure, AC fan motor has t 50Hz zero-crossing detection start check if the fan motor input connection is fixed badly(cn3 on PC) check the fan motor feedback wire is fixed badly (CN23 on PC) PC is faulty and replace it yes replace fan motor input port, cut off power supply and be electrified again yes replace fan motor feedback port, cut off power supply and be electrified again Trouble 7: Outdoor unit failure Check the failure code on outdoor indicator board (5-lamp) 39

42 Trouble 8: Outdoor unit alarms sensor failure start as per the wiring diagram, check if connection port between sensor and PC is correct yes check if the sensor is in open circuit or the connection port to PC is in good condition yes replace sensor and check again re-fix the sensor and check again check if the sensor resistor value is correct yes PC is faulty and repalce it, check again replace sensor and check again Trouble 9: AC current over current protection or current transducer damaged, or compressor blocked rotor, compressor great vibration, compressor abrmal startup, state detecting curcuit abrmal or compressor damaged. The former twice failure can be resumed automatically, if outdoor board occurs this failure always, and can t be resumed for a long time, that shows: 1. Power module (SPDU) damaged, please replace the power module, then re-wiring as per the wiring diagram (70% possibility) 2. Short circuit in power board results in the power module damaged (15% possibility) 3. Damaged compressor results in this failure (10 % possibility) 4. Main control board is faulty, replace it (5 % possibility) Trouble 10: High pressure failure Reasons: 1. Over high system pressure results that the unit stop, and the compressor protection will work. The failure can be resumed. 2. Pressure switch wire is t fixed well or in open circuit. start check if the connector between pressure switch and PC is fixed badly or damaged check if the 2 straight lugs on the pressure switch are in good condition if outdoor fan motor cant startup rmally in cooling mode replace main control board and check again yes replace pressure switch connector, shut off and be electrified again, re-check yes replace pressure switch connector, shut off and be electrified again, re-check yes check if the outdoor motor has power input replace outdoor motor and check again 40

43 Failure 11: Low pressure switch failure Reason: 1. Too low system pressure causes that the unit stops and the compressor protection works, the failure can be resumed. 2. Pressure switch wire is t fixed well or in open circuit. start check if the connector between pressure switch and PC is fixed badly or damaged (CN20 on PC) yes replace pressure switch connector, shut off and be electrified again, re-check check if the 2 straight lugs on the pressure switch work badly yes replace pressure switch connector, shut off and be electrified again, re-check if indoor fan motor cant startup rmally in heating mode(except for defrost) yes check if the indoor motor has power input replace main control board and check again replace indoor motor and check again 41

44 Appendix Sensor characteristic Model Function Part code Characteristic 3U24GS1ERE 4U36HS1ERE gas liquid sensot Oil temp.sensor Defrost temperature sensor power module temp.sensor R77=10KΩ±3% 25/50=3700K±3% R77=10KΩ±3% 25/50=3700K±3% R77=10KΩ±3% 25/50=3700K±3% R122=17K±2% 25/50=4170K±3% 42

45 R77=10KΩ±3% 25/50=3700K±3% T( ) Rm(KΩ) T( ) Rm(KΩ) T( ) Rm(KΩ) T( ) Rm(KΩ)

46 R122=17K±2%25/50=4170K±3% T( ) Rm(KΩ) T( ) Rm(KΩ) T( ) Rm(KΩ) T( ) Rm(KΩ)