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Service manual

ACP-18COFM50AECI

ACP-27COFM79AECI

ACP-28COFM82AECI

ACP-36COFM105AECI

ACP-41COFM123AECI

Summary of Contents for ACP-18COFM50AECI

Page 1: ...EN Service manual ACP 18COFM50AECI ACP 27COFM79AECI ACP 28COFM82AECI ACP 36COFM105AECI ACP 41COFM123AECI ...

Page 2: ......

Page 3: ...n of Outdoor Units 3 2 Features 4 3 Dimensions 5 4 Wiring Diagram 12 5 Refrigeration Cycle Diagram 16 6 Indoor units combination 19 7 Sound Levels 22 8 Installation Details 23 9 Electronic control function 34 10 Troubleshooting 40 ...

Page 4: ... name Dimension mm Compressor ACP 18COFM50AECI 845x320x700 DA150S1C 20FZ ACP 27COFM79AECI 900x315x860 DA250S2C 30MT ACP 28COFM82AECI 900x315x860 DA250S2C 30MT ACP 36COFM105AECI 990x345x965 TNB306FPGMC L ACP 41COFM123AECI 990x345x965 MNB36FAAMC L ...

Page 5: ... valves and prevents water from dripping 4 way valve control It is only operated in the heating operation mode except defrosting operation Outdoor unit Power relay control Hydrophilic aluminum fin Anti rust cabinet Valve protection cover Low noise air flow system Discharge pipe temperature protection ...

Page 6: ...3 Dimensions ACP 18COFM50AECI 560 W1 H 6 D1 335 D2 360 845 W 313 D3 335 D1 R6 R5 A1 22 A2 50 B1 120 110 B2 700 W2 73 58 58 58 110 H1 H2 200 7 243 6 L1 L2 ...

Page 7: ...ACP 27COFM79AECI 900 W 590 W1 860 H 12 D2 355 D1 333 302 D3 333 D1 50 97 90 B2 B1 8 A2 55 55 55 55 55 110 62 W2 H1 H2 R6 238 4 285 7 L1 L2 ...

Page 8: ...ACP 28COFM82AECI 900 W 590 W1 860 H 12 D2 355 D1 333 302 D3 333 D1 50 97 90 B2 B1 8 A2 55 55 55 55 55 55 55 110 62 W2 H1 H2 R6 238 4 285 7 L1 L2 ...

Page 9: ...ACP 36COFM105AECI ACP 41COFM123AECI 990 W W2 81 624 W1 D2 397 D1 366 55 H1 965 H 153 H2 366 D1 B2 125 B1 145 D3 345 60 22 A2 A1 R5 R6 ...

Page 10: ...4 Wiring Diagram ACP 18COFM50AECI ...

Page 11: ...ACP 27COFM79AECI ACP 28COFM82AECI ...

Page 12: ...ACP 41COFM123AECI ACP 36COFM105AECI ...

Page 13: ...PILIARY B LIQUID VALVE B GAS VALVE B Accumulator T2B A Evaporator temp sensor outlet T2B B 5 2 Refrigeration circuit drawing of inverter 1 drive 3 type LIQUID VALVE A GAS VALVE A HEAT EXCHANGE EVAPORATOR HEAT EXCHANGE CONDENSER Compressor 4 WAY VALVE COOLING HEATING T2 Evaporator temp sensor middle T1 Room temp sensor T3 Condenser temp sensor T5 Discharge temp sensor T4 Ambient temp sensor INDOOR ...

Page 14: ...itch Low pressure switch T2B A Evaporator temp sensor outlet T2B B T2B C T2B D 5 4 Refrigeration circuit drawing of ACP 36COFM105AECI LIQUID VALVE A GAS VALVE A HEAT EXCHANGE EVAPORATOR HEAT EXCHANGE CONDENSER COOLING HEATING T2 Evaporator temp sensor middle T1 Room temp sensor T3 Condenser temp sensor T4 Ambient temp sensor R O O D T U O R O O D N I EXV A CAPILIARY A CHECK VALVE CAPILIARY TUBE EX...

Page 15: ... Condenser temp sensor T4 Ambient temp sensor R O O D T U O R O O D N I EXV A CAPILIARY A CHECK VALVE CAPILIARY TUBE EXV B CAPILIARY B LIQUID VALVE B GAS VALVE B EXV C CAPILIARY C LIQUID VALVE C GAS VALVE C EXV D CAPILIARY D LIQUID VALVE D GAS VALVE D EXV E CAPILIARY E LIQUID VALVE E GAS VALVE E Compressor 4 WAY VALVE T5 Discharge temp sensor Accumulator High pressure switch Low pressure switch ...

Page 16: ...t 7 7 7 9 9 9 7 9 9 12 12 7 12 9 18 18 7 18 12 12 Indoor unit combination for ACP 27COFM79AECI One unit Two unit Three unit 7 7 7 9 9 12 18 7 7 7 7 9 9 7 12 18 9 12 12 9 7 9 9 12 18 18 7 7 9 7 9 12 9 9 9 9 12 18 12 7 12 9 18 7 7 12 7 9 18 9 9 12 12 12 12 18 7 18 12 12 7 7 18 7 12 12 9 9 18 ...

Page 17: ... 12 7 7 9 9 7 9 9 9 7 12 12 12 9 9 12 12 12 12 12 18 7 7 9 12 7 9 9 12 7 12 12 18 9 9 12 18 Five Unit 7 7 7 7 7 7 7 7 9 18 7 7 9 12 18 7 9 9 12 18 9 9 9 12 12 7 7 7 7 9 7 7 7 12 18 7 7 12 12 18 7 9 12 12 12 9 9 9 12 18 7 7 7 7 12 7 7 7 18 18 7 9 9 9 9 7 9 12 12 18 9 9 12 12 12 One unit Two unit Three unit Four unit 7 7 7 9 9 12 18 7 7 7 7 9 9 9 9 9 7 7 7 7 7 7 9 9 7 9 9 12 9 7 9 9 12 18 18 7 7 9 7...

Page 18: ... 9 9 9 9 12 12 12 7 7 7 12 7 7 12 18 7 9 12 18 9 9 9 12 9 12 12 18 7 7 7 18 7 7 12 24 7 9 12 24 9 9 9 18 12 12 12 12 7 7 7 24 7 7 18 18 7 9 18 18 9 9 9 24 12 12 12 18 7 7 9 9 7 9 9 9 7 12 12 12 9 9 12 12 7 7 9 12 7 9 9 12 7 12 12 18 9 9 12 18 7 7 9 18 7 9 9 18 7 12 12 24 9 9 12 24 Five Unit 7 7 7 7 7 7 7 7 9 18 7 7 9 12 18 7 9 9 12 18 9 9 9 12 12 7 7 7 7 9 7 7 7 12 18 7 7 12 12 18 7 9 12 12 12 9 9...

Page 19: ...t Microphone Note H 0 5 height of outdoor unit A B d l e v e l e s i o N A B d r e w o P e s i o N l e d o M 2 6 3 6 2 6 8 6 2 6 0 7 5 6 8 6 6 6 2 7 ACP 18COFM50AECI ACP 27COFM79AECI ACP 28COFM82AECI ACP 36COFM105AECI ACP 41COFM123AECI ...

Page 20: ...rrent indicated on the nameplate which located on the side panel of the unit Please refer to the nameplate before selecting the cable fuse and switch 8 3 Pipe length and the elevation Maximum piping length and height difference 1 drive 2 1 drive 3 1 drive 4 1 drive 5 Max length for all rooms m 30 45 60 75 Max length for one IU m 20 25 30 30 Max height difference between IU and OU m OU higher than ...

Page 21: ... 3 8 8 4 Installation for the first time Air and moisture in the refrigerant system have undesirable effects as below Pressure in the system rises Operating current rises Cooling or heating efficiency drops Moisture in the refrigerant circuit may freeze and block capillary tubing Water may lead to corrosion of parts in the refrigerant system Therefore the indoor units and the pipes between indoor ...

Page 22: ...there are some leakage points Fully close the handle Lo valve of the manifold valve and stop the operation of the vacuum pump Confirm that the gauge needle does not move approximately 5 minutes after turning off the vacuum pump 7 Turn the flare nut of the 3 way valves about 45 counterclockwise for 6 or 7seconds after the gas coming out then tighten the flare nut again Make sure the pressure displa...

Page 23: ...y valve 4 Check the gas leakage Check the flare connections for gas leakage 5 Discharge the refrigerant Close the valve on the charging cylinder and discharge the refrigerant by loosening the flare nut on the 2 way valve approximately 45 until the gauge indicates 0 3 to 0 5 Mpa 6 Disconnect the charge set and the charging cylinder and set the 2 way and 3 way valves to the open position Be sure to ...

Page 24: ...ir be careful of the liquid refrigerant 3 Put the charging cylinder onto the electronic scale and record the weight 4 Operate the air conditioner at the cooling mode 5 Open the valves Low side on the charge set and charge the system with liquid refrigerant 6 When the electronic scale displays the proper weight refer to the table disconnect the charge hose from the 3 way valve s service port immedi...

Page 25: ...nder onto the electronic scale and record the weight 4 Operate the air conditioner at the cooling mode 5 Open the valves Low side on the charge set and charge the system with liquid refrigerant 6 When the electronic scale displays the proper weight refer to the gauge and the pressure of the low side disconnect the charge hose from the 3 way valve s service port immediately and turn off the air con...

Page 26: ...e manifold valve slightly to purge air from the charge hose for 5 seconds and then close it quickly 4 Set the 2 way valve to the close position 5 Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 0 1MPa 6 Set the 3 way valve to the closed position immediately Do this quickly so that the gauge ends up indicating 0 3 to 0 5Mpa Disconnect the charge set and tighten...

Page 27: ... valve 4 Check the gas leakage Check the flare connections for gas leakage 5 Discharge the refrigerant Close the valve on the charging cylinder and discharge the refrigerant by loosening the flare nut on the 2 way valve approximately 45 until the gauge indicates 0 3 to 0 5 Mpa 6 Disconnect the charge set and the charging cylinder and set the 2 way and 3 way valves to the open position Be sure to u...

Page 28: ... s service port 3 Evacuation for approximately one hour Confirm that the compound meter indicates 0 1Mpa 4 Close the valve Low side on the charge set turn off the vacuum pump and confirm that the gauge needle does not move approximately 5 minutes after turning off the vacuum pump 5 Disconnect the charge hose from the vacuum pump ...

Page 29: ...ow side on the charge set and charge the system with liquid refrigerant If the system cannot be charge with the specified amount of refrigerant or can be charged with a little at a time approximately 150g each time operating the air conditioner in the cooling cycle however one time is not sufficient wait approximately 1 minute and then repeat the procedure 5 When the electronic scale displays the ...

Page 30: ... There are one low pressure centralized valve and one high pressure centralized valve it will be more time saving when vacumm and recycle refrigerant But refer to the previous instruction when vacumm and recycle refrigerant ...

Page 31: ... the LED displays In compressor operation the LED display the running frequency In defrosting mode The LED displays dF or alternative displays between running frequency and dF each displays 0 5s In compressor pre heating The LED displays PH or alternative displays between running frequency and PH each displays 0 5s During the oil return process The LED displays RO or alternative displays between r...

Page 32: ...or unit evaporator outlet temp T2BA If the temp is lower than 9 degree the digital display tube will show 9 If the temp is higher than 70 degree the digital display tube will show 70 If the indoor unit is not connected the digital display tube will show 18 B indoor unit evaporator outlet temp T2BB 19 C indoor unit evaporator outlet temp T2BC 20 D indoor unit evaporator outlet temp T2BD 21 E indoor...

Page 33: ...urrent Bit6 Frequency limit caused by PFC Bit5 Frequency limit caused by T4 Bit4 Frequency limit caused by T2 Bit3 Frequency limit caused by T3 Bit2 Frequency limit caused by T5 Bit1 Frequency limit caused by current Bit0 Frequency limit caused by voltage 43 Average value of T2 Sum T2 value of all indoor units number of indoor units in good connection 44 Outdoor unit fan motor state Off 0 High spe...

Page 34: ...Ts 4 0 a 3 1 1 3 1 2 0 b c d e f 2 Capacity area a b c d e f Norm value N 3 2 1 5 1 0 5 0 9 4 4 Number of indoor unit Display Number of indoor unit 1 1 2 2 3 3 4 4 5 5 9 4 5 Opening degree of electronic expansion valve Actual opening degree equals the display data times 4 ...

Page 35: ...ds the compressor frequency will be limited as below table Cooling mode Current frequency Hz Current limit value A Frequency limit COOL_F16 ICOOLLMT12 Decrease the frequency to COOL_F4 and run at COOL_F4 for 3 minutes After that the frequency will be adjusted according to the capacity demand and rise to the upper level every 3 minutes When the frequency COOL_F4 via capacity demand COOL_F15 ICOOLLM...

Page 36: ... condenser coil temp protection When T3 65 for 3 seconds the compressor will stop while the indoor fan and outdoor fan will continue When T3 52 the protection will release and the compressor will restart after 3 minutes 9 5 7 Outdoor unit anti freezing protection For other models When T2B 0 for 250 seconds the indoor unit capacity demand will be zero and resume to normal when T2B 10 For M2OD 16HFN...

Page 37: ... compressor drive protection P5 6 Mode conflict P6 7 Low pressure protection Just matching with M4OA 36HFN1 Q M4OD 28HFN1 Q M5OC 36HF N1 Q M5OD 42HFN1 Q O light X off flash Light Commercial series Except Console NO MALFUNCTION RUN Timer DEF Alarm DISPLAY DIGITAL TUBE 1 Open or short circuit of T1 temperature sensor X X X E0 2 Open or short circuit of T2 temperature sensor X X X E1 3 Indoor outdoor...

Page 38: ...tween indoor and outdoor units X X 4 Outdoor fan speed has been out of control X O 5 Indoor EEPROM malfunction X 6 IPM module protection X 7 Open or short circuit of T3 or T4 temperature sensor or Outdoor unit EEPROM parameter error 8 Voltage protection O 9 Inverter compressor drive protection X 10 Indoor fan speed has been out of control O 11 Mode conflict X O O light X off flash at 5Hz flash at ...

Page 39: ...o C Indoor unit coil outlet temperature sensor or connector of sensor is defective F4 No D Indoor unit coil outlet temperature sensor or connector of sensor is defective F5 No E Indoor unit coil outlet temperature sensor or connector of sensor is defective P1 High pressure protection For M4OA 36HFN1 Q M4OD 28HFN1 Q M5OC 36HFN1 Q M5OD 42HFN1 Q P2 Low pressure protection For M4OA 36HFN1 Q M4OD 28HFN...

Page 40: ...rouble shooting 10 3 1 For the indoor unit 10 3 1 1 Indoor EEPROM malfunction EEPROM An electrically erasable programmable read only memory whose contents can be erased and reprogrammed using a pulsed voltage ...

Page 41: ...10 3 1 2 Indoor outdoor units communication error ...

Page 42: ...50AECI ACP 28COFM82AECI tri zone Self Check Power Operating Self Check Operating Pic 2 IPM or outdoor main PCB For ACP 36COFM105AECI qui zone Pic 1 check the voltage of N to S Vs is it moving alternately between positive value and negative value ...

Page 43: ... PIC3 Main board LED when power on and unit standby PIC 4 check point button Press 1 time for check how many indoor units are connected ...

Page 44: ...f the voltage is less than 100V 208 240V power supply or 50V 115V power supply the PCB must have problems and need to be replaced 2 Indoor DC fan motor control chip is inside fan motor Power on and when the unit is in standby measure the voltage of pin1 pin3 pin4 pin3 in fan motor connector If the value of the voltage is not in the range showing in below table the PCB must have problems and need t...

Page 45: ...type NO Color Signal Voltage 1 Red Vs Vm 280V 380V 2 3 Black GND 0V 4 White Vcc 14 17 5V 5 Yellow Vsp 0 5 6V 6 Blue FG 14 17 5V For other types NO Color Signal Voltage 1 Red Vs Vm 192V 380V 2 3 Black GND 0V 4 White Vcc 13 5 16 5V 5 Yellow Vsp 0 6 5V 6 Blue FG 13 5 16 5V ...

Page 46: ... the connections between temperature sensor and PCB Are the connections good Correct the connections No Yes No Replace the sensor Replace the indoor PCB Measure the resistance value of the sensor via Appendix 1 Is it normal Yes 10 3 1 6 Full water malfunction ...

Page 47: ...10 3 2 For the outdoor unit 10 3 2 1 Outdoor EEPROM malfunction ODU E0 EEPROM An electrically erasable programmable read only memory whose contents can be erased and reprogrammed using a pulsed voltage ...

Page 48: ...10 3 2 2 Communication malfunction between IPM board and outdoor main board ODU E3 ...

Page 49: ...40VAC Check the power supply Check whether the voltage of IPM board P and N is normal DC277 356V for 18 27KBtu h DC277 410V for 36 42KBtu h Replace bridge rectifiers and then check whether the system can run normally Replace IPM board and then check whether the system can run normally Replace outdoor main board Yes No No No No Yes Trouble is solved Yes Yes ...

Page 50: ... in standby measure the voltage of pin1 pin3 pin4 pin3 in fan motor connector If the value of the voltage is not in the range showing in below table the PCB must have problems and need to be replaced DC motor voltage input and output NO Color Signal Voltage 1 Red Vs Vm 140V 380V 2 3 Black GND 0V 4 White Vcc 13 5 16 5V 5 Yellow Vsp 0 6 5V 6 Blue FG 15V ...

Page 51: ...10 3 2 5 High pressure protection ODU P1 For ACP 36COFM105AECI ACP 28COFM82AECI ACP 41COFM123AECI ...

Page 52: ...nect it well Replace outdoor main board No Replace low pressure protector No Whether the low pressure protector is broken Check whether the outdoor ambient temperature is too low No Stop the unit Yes Open fully valve core of high pressure valve No Check whether valve core of high pressure valve is opened Check if the indoor fan runs properly in cooling mode please refer to the solution of fan spee...

Page 53: ...10 3 2 7 Current protection of compressor ODU P3 Model ACP 18COFM50AECI ACP 27COFM79AECI ACP 28COFM82AEC ACP 36COFM105AECI ACP 41COFM123AECI Max prote ction curre nt 15A 18 5A 18A 23A 25A ...

Page 54: ...essor discharge temp sensor and PCB according to wiring diagrams Measure the resistance value of compressor discharge temp sensor If the value is not normal is normal refer to the Appendix 2 No Yes Yes No Correct the wiring connection Stop leaking and add refrigerant Replace the compressor discharge temp sensor No Yes Replace high pressure valve assy Yes No Replace outdoor main PCB No Check whethe...

Page 55: ...k whether the outdoor ambient temperature is higher than 50 No Stop the unit Yes Check if the outdoor unit ventilation is good Yes Make the outdoor unit ventilate well Check whether the heat exchanger is dirty No Clean the heat exchanger Yes Check whether the refrigerant system is ok Replace outdoor main board No Refrigerant is not enough add the refrigerant No Check if the outdoor fan runs proper...

Page 56: ...sor check whether the system can work normally Check whether the lines in E part box are connected tightly Yes Connect it tightly check ok or not No No Yes No Replace the bridge rectifiers Check whether the bridge rectifiers are normal Use the multimeter to measure the resistance between each two terminals check whether there is the condition that value of resistance is 0 Check whether the connect...

Page 57: ...n motor WZDK27 38GS WZDK27 38GS WZDK27 38GS YSK68 4P Model 7K Cassette 9K Cassette 12K Cassette 18K Cassette Indoor fan motor WZDK37 38G WZDK37 38G WZDK37 38G YDK37 4P Model 9K Console 12K Console 18K Console Indoor fan motor RD 280 20 8A RD 280 20 8A RD 280 20 8A Outdoor unit Model 1x2 14k 1x2 18k 1x3 27K 1x3 21K Compressor DA130M1C 31FZ DA150S1C 20FZ DA250S2C 30MT DA150S1C 20FZ Outdoor fan motor...

Page 58: ...measure the resistance value with a tester Temperature Sensors Room temp T1 sensor Indoor coil temp T2 sensor Outdoor coil temp T3 sensor Outdoor ambient temp T4 sensor Compressor discharge temp T5 sensor Measure the resistance value of each winding by using the multi meter ...

Page 59: ... 34105 116 0 40060 3 41 5878 37 5 87359 77 1 29078 117 0 38991 2 39 8239 38 5 62961 78 1 25423 118 0 37956 1 37 1988 39 5 39689 79 1 21330 119 0 36954 0 35 2024 40 5 17519 80 1 17393 120 0 35982 1 33 3269 41 4 96392 81 1 13604 121 0 35042 2 31 5635 42 4 76253 82 1 09958 122 0 3413 3 29 9058 43 4 57050 83 1 06448 123 0 33246 4 28 3459 44 4 38736 84 1 03069 124 0 32390 5 26 8778 45 4 21263 85 0 9981...

Page 60: ... 5 234 9 35 35 78 75 8 084 115 2 422 4 222 8 36 34 32 76 7 82 116 2 357 3 211 4 37 32 94 77 7 566 117 2 294 2 200 7 38 31 62 78 7 321 118 2 233 1 190 5 39 30 36 79 7 086 119 2 174 0 180 9 40 29 15 80 6 859 120 2 117 1 171 9 41 28 81 6 641 121 2 061 2 163 3 42 26 9 82 6 43 122 2 007 3 155 2 43 25 86 83 6 228 123 1 955 4 147 6 44 24 85 84 6 033 124 1 905 5 140 4 45 23 89 85 5 844 125 1 856 6 133 5 4...

Page 61: ...e the resistance value of each winding by using the tester Position Resistance Value DA130M1C 31FZ DA150S1C 20FZ DA250S2C 30MT TNB306FPGMC L ASN108D22UEZ MNB36FAAMC L Blue Red 1 77Ω 20 0 95Ω 20 0 55Ω 20 0 53Ω 20 1 57Ω 20 0 44Ω 20 ...

Page 62: ...r AC Fan Motor Measure the resistance value of each winding by using the tester Posi tion Resistance Value RPG20D Weilng RPG28D T ongDe RPG28D Dayang RPG20E T ongDe RPG20E Weilng RPG13H Weilng RPG25 T ongDe YSK68 4P Weilng YDK37 4P Blac k Red 398Ω 8 20 255Ω 8 20 271 3Ω 8 20 415Ω 8 20 387Ω 8 20 575Ω 8 20 295Ω 8 20 285 8Ω 8 20 258 7 Ω 8 20 Red Yello w 345Ω 8 20 335Ω 8 20 347 8Ω 8 20 396Ω 8 20 378Ω 8...

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