Perfect Aire 3PAMS18-HH-MZO2 Service Manual Download Page 75

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7.4.1.4 Indoor fan speed malfunction diagnosis and solution.

Malfunction conditions

When indoor fan speed is too low (300RPM) for a certain period of time,
the unit ceases operation and the LED displays a failure code.

Potential causes

●

Wiring mistake

●

Faulty fan assembly

●

Faulty fan motor

●

Faulty PCB

Trouble shooting:

Power off, then restart the

unit after 3 minutes. Does

a problem remain?

Shut off the power supply,
Rotate the fan by hand.
Does it turn easily?

The unit is operating normally

Find the cause of the

problem and resolve it

Check the wiring of fan

motor. Is it improperly

wired?

Yes

Correct the connections.

Replace the fan motor

Yes

Measure the voltage for the

fan motor from the main

PCB. Is it within normal

parameters?

Yes

Replace the main PCB

Summary of Contents for 3PAMS18-HH-MZO2

Page 1: ...MULTI ZONE OUTDOOR UNITS SERVICE MANUAL NON HH CONDENSERS 3PAMSH18 MZO2 3PAMSH27 MZO3 3PAMSH36 MZO4 3PAMSH48 MZO5 HH CONDENSERS 3PAMS18 HH MZO2 3PAMS27 HH MZO3 3PAMS36 HH MZO4 3PAMS48 HH MZO5 ...

Page 2: ...dures and equipped with the proper tools and test instruments Installation or repairs made by unqualified persons can result in hazards to you and others Failure to carefully read and follow all instructions in this manual can result in equipment malfunction property damage personal injury and or death Model Numbers M3OF 27HFN1 M M4OF 36HFN1 M M2OH 18HFN1 M M3OH 27HFN1 M 3PAMS48 HH MZO5 3PAMS18 HH...

Page 3: ...vicing the indoor unit refrigeration circuit 16 4 7 Evacuation after servicing the outdoor unit refrigeration circuit 17 5 Electronic Function 19 5 1 Abbreviation 19 5 2 Electric Control Working Environment 19 5 3 Main Protection 19 5 4 Control and Functions 21 6 Wiring Diagrams 27 7 Troubleshooting 54 7 1Safety 54 7 2 Indoor Unit Error Display 55 7 3 Outdoor Unit Display 58 7 4 Diagnosis and Solu...

Page 4: ...3 M2OH 18HFN1 M M3OF 27HFN1 M M3OH 27HFN1 M WD30 metal plate 151 M4OF 36HFN1 M WD30 metal plate 159 M4OH 36HFN1 M M5OF 48HFN1 M WE30 metal plate 166 ...

Page 5: ...4 ...

Page 6: ...tdoor Unit Nominal capacity Suggested Combination Limit Two units Three units M3OF 27HFN1 M 3PAMSH27 MZO3 7 8kW 6 12 6 6 6 6 12 12 None 6 18 6 6 9 6 12 18 9 9 6 6 12 9 9 9 9 12 6 6 18 9 9 12 9 18 6 9 9 9 9 18 12 12 6 9 12 9 12 12 12 18 6 9 18 12 12 12 18 18 M3OH 27HFN1 M 3PAMS27 HH MZO3 7 8kW 6 12 6 6 6 6 9 18 None 6 18 6 6 9 6 12 12 9 9 6 6 12 9 9 9 9 12 6 6 18 9 9 12 9 18 6 6 24 9 9 18 9 24 6 9 ...

Page 7: ...2 12 24 6 6 12 12 9 9 12 12 6 18 24 12 18 18 6 6 12 18 9 9 12 18 9 9 9 6 6 12 24 9 12 12 12 6 9 9 9 12 12 12 12 6 9 9 12 M4OH 36HFN1 M 3PAMS36 HH MZO4 10 5kW 6 18 6 6 12 9 9 9 6 6 6 6 6 9 9 12 None 6 24 6 6 18 9 9 12 6 6 6 9 6 9 9 18 6 30 6 6 24 9 9 18 6 6 6 12 6 9 9 24 9 18 6 6 30 9 9 24 6 6 6 18 6 9 12 12 9 24 6 9 12 9 9 30 6 6 6 24 6 9 12 18 9 30 6 9 18 9 12 12 6 6 6 30 6 12 12 12 12 12 6 9 24 ...

Page 8: ... 12 12 12 6 6 12 24 9 9 9 24 6 6 6 9 30 6 9 9 12 18 24 36 6 18 24 12 12 18 6 6 12 30 9 9 9 30 6 6 6 9 36 6 9 9 12 24 30 30 6 18 30 12 12 24 6 6 12 36 9 9 9 36 6 6 6 12 12 6 9 9 18 18 6 18 36 12 12 30 6 6 18 18 9 9 12 12 6 6 6 12 18 6 9 12 12 12 6 24 24 12 12 36 6 6 18 24 9 9 12 18 6 6 6 12 24 6 9 12 12 18 6 24 30 12 18 18 6 6 18 30 9 9 12 24 6 6 6 12 30 6 9 12 12 24 9 9 18 12 18 24 6 6 24 24 9 9 1...

Page 9: ... 3 13 8 3PAMSH18 MZO2 mm 890 342 673 990 663 354 inch 35 04 13 46 26 50 38 98 26 10 13 94 M2OH 18HFN1 M M3OF 27HFN1 M M3OH 27HFN1 M 3PAMS18 HH MZO2 3PAMSH27 MZO3 3PAMS27 HH MZO3 mm 946 410 810 1034 673 403 inch 37 2 16 5 31 9 40 6 26 5 15 9 M4OF 36HFN1 M 3PAMSH36 MZO4 mm 946 410 810 1034 673 403 inch 37 2 16 5 31 9 40 6 26 5 15 9 ...

Page 10: ...9 H W A D W1 B Model Unit W D H W1 A B M4OH 36HFN1 M M5OF 48HFN1 M 3PAMS48 HH MZO5 3PAMS36 HH MZO4 3PAMSH48 MZO5 mm 952 415 1333 1060 634 404 inch 37 5 16 3 52 5 41 7 25 0 15 9 ...

Page 11: ...ge temp sensor Accumulator High pressure switch Low pressure switch T2B A Evaporator temp sensor outlet T2B B T2B C 3 2 Refrigeration circuit drawing of M2OH 18HFN1 M 3PAMS18 HH MZO2 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 INDOOR OUTDOOR EXV A CAP...

Page 12: ...r High pressure switch Low pressure switch T2B A Evaporator temp sensor outlet T2B B T2B C 3 4 Refrigeration circuit drawing of M4OF 36HFN1 M M4OH 36HFN1 M 3PAMSH36 MZO4 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 INDOOR OUTDOOR EXV A CAPILLARY TUBE E...

Page 13: ...ure switch T2B A Evaporator temp sensor outlet T2B B T2B C T2B D EXV F Radiator for IPM 3 6 Refrigeration circuit drawing of M5OF 48HFN1 M 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 INDOOR OUTDOOR EXV A CAPILLARY TUBE EXV B LIQUID VALVE B GAS VALVE B...

Page 14: ...ssure switch T2B A Evaporator temp sensor outlet T2B B T2B C T2B D T2B E EXV F Plate heat exchanger EXV G Radiator for IPM 3 8 Refrigeration circuit drawing of 3PAMSH48 MZO5 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 INDOOR OUTDOOR EXV A EXV B LIQUID...

Page 15: ...pipe length pre charge pipe lengthxN x0 32oZ ft Note The standard pipe length is 7 5m Caution Refrigerant pipe diameter is different according to indoor unit to be connected When using the extension pipe refer to the tables below When refrigerant pipe diameter is different from that of the outdoor unit connector 18K indoor unit an additional adapter is required Indoor unit Extension pipe diameter ...

Page 16: ...n atmospheric pressure Then remove the charge hose from the 3 way valve 8 Fully open the 2 wayand 3 way valves and securely tighten the cap on the 3 way valve 2 Adding refrigerant if the pipe length exceeds chargeless pipe length Procedure 1 Connect the charge hose to the charging cylinder and open the 2 way and 3 way valves With the charge hose you disconnected from the vacuum pump connect it to ...

Page 17: ... wrench to tighten the service port cap to a torque of 18N m 13 27 ft lbs Be sure to check for gas leaks 4 6 Procedure when servicing the indoor unit refrigeration circuit 1 Collecting the refrigerant into the outdoor unit Procedure 1 Confirm that both the 2 way and 3 way valves are set to the opened position Remove the valve stem caps and confirm that the valve stems are in the opened position Be...

Page 18: ... counterclockwise for 6 or 7seconds after the gas coming out then tighten the flare nut again Make sure the pressure display in the pressure indicator is a little higher than the atmosphere pressure Then remove the charge hose from the 3 way valve 8 Fully open the 2 way valve and 3 way valve and securely tighten the cap of the 3 way valve 4 7 Evacuation after servicing the outdoor unit refrigerati...

Page 19: ...owever one time is not sufficient wait approximately 1 minute and then repeat the procedure 5 When the electronic scale displays the proper weight disconnect the charge hose from the 3 way valve s service port immediately If the system has been charged with liquid refrigerant while operating the air conditioner turn off the air conditioner before disconnecting the hose 6 Mounted the valve stem cap...

Page 20: ...urrent frequency If the temperature increase and T5 110 230 decrease the frequency to a lower level every 2 minutes till to F1 If T5 115 239 for 10 seconds the compressor stops and then restart until T5 90 194 5 3 3 Fan Speed Malfunction If outdoor fan speed is lower than 100RPM or higher than 2400RPM for 60 seconds or more the unit stops and LED displays failure code 5 3 4 Inverter Module Protect...

Page 21: ...rent limit value HeatT4Zone3I Heating 14 T4 10 current limit value HeatT4Zone2I Heating 9 T4 6 current limit value HeatT4Zone1I Heating 5 T4 current limit value HeatStopI Heating stop protection current value For 3PAMS36 HH MZO4 3PAMSH48 MZO5 3PAMS48 HH MZO5 HeatT4Zone4I HeatT4Zone3I HeatT4Zone2I HeatT4Zone1I 15 14 10 9 6 5 T4 C HeatT4Zone0I HeatT4Zone 1I 4 5 9 10 HeatReturnI The difference betwee...

Page 22: ...eration If the outdoor ambient temperature is higher than the set frequency during oil return the unit stops the oil return process 5 3 11 Low Outdoor Ambient Temperature Protection When the compressor is off and T4 is lower than 35 for 10 seconds the unit stops and displays LP or PC0L When the compressor is on and T4 remains lower than 40 for 10 seconds the unit stops and displays LP or PC0L When...

Page 23: ...ode T1 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 code N 3 2 1 5 1 0 5 0 Model 9K 12K 18K 24K HP 1 0 1 2 1 5 2 5 Note The final result is an integer Then modify it according to a T2 average correction Note Average value of T2 Sum T2 value of all indoor units indoor units number T2 average Decrease frequency 47 Keep frequency 40 Increase frequency Use the following table and ...

Page 24: ...defrost if any of the following conditions are met this condition can be shielded by parameters a The continuous operation time of the press exceeds 30 minutes and T3 7 degrees b The continuous operation time of the press is more than 30 minutes and T30 15 degrees 6 For the first defrosting when the machine is turned on after the compressor has been running for 30 minutes when T4 T3 0 5T4 KDELTT_A...

Page 25: ...an speed 10 9 Breeze fan speed 0 1 F fan speed 5 6 G fan speed 10 11 H fan speed I fan speed When low ambient cooling is in effect Outdoor fan speed control logic low ambient cooling When T4 15 59 and T3 30 86 the unit enters into low ambient cooling mode The outdoor fan chooses a speed according to T3 When T3 38 100 4 or when T4 15 59 the outdoor fan chooses a speed according to T4 again 38 Exit ...

Page 26: ...initial heating opening is run otherwise the initial cooling opening is run and the internal machine is not connected deal with 7k unit 2 3 Main EXV action When the compressor is off the main EXV keeps the opening degree when the compressor is turned off within the first 90 seconds If it is currently heating mode 20P clear and keep 0P otherwise adjust to 480P 3 Other EXV except for EVI valve canno...

Page 27: ...2 the T2 average 2 the relevant valve s open range remains as is If the T2 average 2 the relevant valve needs to open 16p more This modification is carried out every 2 minutes 5 4 5 Four Way Valve Control In heating mode a four way valve is opened In defrosting a four way valve operates according to the current defrosting action In other modes a four way valve is closed When the unit is switched f...

Page 28: ...27 6 Wiring Diagrams 6 1 Wiring diagram of 1 drive 2 outdoor M2OF 18HFN1 M M2OH 18HFN1 M 3PAMS18 HH MZO2 ...

Page 29: ...28 3PAMSH18 MZO2 5 ...

Page 30: ...29 6 2 Wiring diagram of 1 drive 3 outdoor M3OF 27HFN1 M ...

Page 31: ...30 3PAMSH27 MZO3 3PAMS27 HH MZO3 ...

Page 32: ...31 M3OH 27HFN1 M ...

Page 33: ...32 6 3 Wiring diagram of 1 drive 4 outdoor M4OF 36HFN1 M ...

Page 34: ...33 M4OH 36HFN1 M 3PAMSH36 MZO4 ...

Page 35: ...34 3PAMS36 HH MZO4 MAIN CONTRO L BOARD REVERSING VALVE ELECTRONIC EX PANSIVE VALVE HEAT_D CHASSIS HE ATER HEAT_Y COMP TOP OLP TEMP SENSOR COMP TOP 16022000036850 ...

Page 36: ...35 6 4 Wiring diagram of 1 drive 5 outdoor M5OF 48HFN1 M ...

Page 37: ...36 3PAMS48 HH MZO5 3PAMSH48 MZO5 MAIN CONTRO L BOARD REVERSING VALVE ELECTRONIC EX PANSIVE VALVE HEAT_D CHASSIS HE ATER HEAT_Y COMP TOP OLP TEMP SENSOR COMP TOP 16022000036851 ...

Page 38: ... MZO2 3PAMSH27 MZO3 3PAMS27 HH MZO3 3PAMSH36 MZO4 No Name CN Meaning 1 T3 T4 CN17 T3 condenser temperature sensor T4 outdoor ambient temperature sensor 2 CN7 CN7 connect to discharge sensor 3 TESTPORT CN26 connect to DR board CN1 4 LOW HIGH CN14 Red low pressure protect ...

Page 39: ...230V AC when is ON 15 Fan C CN13 connect to fan capacitor 16 Outdoor AC Fan CN11 connect to outdoor AC fan 17 Fan C CN10 connect to fan capacitor 18 Electronic Expansion valve CN18 connect to Electric Expansion Valve A CN19 connect to Electric Expansion Valve B CN22 connect to Electric Expansion Valve C CN24 connect to Electric Expansion Valve D 19 S A CN25 Current loop communication A signal wire...

Page 40: ... MZO3 3PAMS27 HH MZO3 3PAMSH36 MZO4 No Name CN Meaning 1 CN4 CN4 connect to main board L Out CN5 CN5 connect to main board N Out 2 CN_Reactor CN2 CN3 connect to reactor 3 CN_COMP CN_COMP connect to compressor 4 CN1 CN1 connect to main board CN21 5 AN_DC CN14 connect to outdoor DC fan ...

Page 41: ...connect to Electric Expansion Valve C CN5 connect to Electric Expansion Valve D 3 S A CN10 S connect to indoor unit communication pin1 pin2 24VDC Pulse wave pin2 pin3 208 230V AC input S B CN13 S C CN3 S D CN15 4 HEAT_D CN21 CN36 connect to chassis heater 208 230V AC when is ON 5 4 way CN38 connect to 4 way valve 208 230V AC when is ON 6 HEAT_Y CN8 CN20 connect to compressor heater 208 230V AC whe...

Page 42: ...or T4 exhaust temp sensor TP 9 OLP TEMP SENSOR CN30 connect to compressor top temp sensor 5VDC Pulse wave 10 H PRO L RPO CN29 connect to high and low pressure swtich pin1 pin2 pin3 pin4 5VDC pulse wave 11 TESTPORT CN24 used for testing 12 CN27 connect to key board CN1 ...

Page 43: ...ire connect to the terminal 24V DC Pulse wave 2 S B CN29 Current loop communication B signal wire connect to the terminal 24V DC Pulse wave 3 S C CN28 Current loop communication C signal wire connect to the terminal 24V DC Pulse wave 4 S D CN27 Current loop communication D signal wire connect to the terminal 24V ...

Page 44: ...CN7 CN7 Connect to inverter driver 15 LOW HIGH CN9 Connect to high and low pressure sensor 16 T3 T4 CN8 Connect to T3 T4 temperature sensor T3 condenser temperature sensor T4 outdoor ambient temperature sensor 17 Fuse Fuse 2 Fuse 5A 250V 18 L CN22 Connect to the 4 way valve When the 4 way is ON output 208 230V AC N CN3 19 CN42 CN42 connect to fan capacitor CN41 CN41 20 AC Fan CN43 Connect to AC fa...

Page 45: ...H 27HFN1 M No Name CN Meaning 1 OUT FAN DC CN19 Connect to DC motor 2 W J13 Connect to compressor W 3 V J10 Connect to compressor V 4 U J7 Connect to compressor U 5 CN54 CN54 Connect to main PCB CN6 6 CN51 CN51 Connect to PFC inductor ...

Page 46: ...45 7 CN53 CN53 Connect to main PCB CN5 8 CN52 CN52 Connect to PFC inductor 9 CN55 CN55 Connect to main PCB CN7 ...

Page 47: ...46 PCB board of M5OF 48HFN1 M M4OH 36HFN1 M ...

Page 48: ...AC fan1 7 AC FAN2 CN27 CN32 CN34 connect to AC fan2 8 TH CN12 connect to heat sink sensor 9 H PRO L RPO CN10 connect to high and low pressure swtich pin1 pin2 pin3 pin4 5VDC pulse wave 10 OLP TEMP SENSOR CN14 connect to compressor top temp sensor 5VDC Pulse wave 11 T3 T4 CN9 connect to pipe temp sensor T3 ambient temp sensor T4 12 Electronic Expansion valve CN15 connect to Electric Expansion Valve...

Page 49: ... to evaporator coil outlet temperature sensor T2B 15 TESTPORT CN35 used for testing 16 CN6 CN6 connect to IPM board 17 CN22 CN22 485 communication 18 N CN4 connect to IPM board 208 230V AC input L CN2 IPM board of M5OF 48HFN1 M M4OH 36HFN1 M ...

Page 50: ...nnect to compressor V V 0V AC standby U U 10 200V AC running 2 CN9 CN9 Connect to main PCB 3 FAN1 CN11 connect to DC motor driver board 4 FAN2 CN7 5 PFC L1 CN2 connect to reactor PFC L2 CN3 6 PFC L1 CN6 connect to bridge PFC L2 CN1 ...

Page 51: ...50 PCB Board of 3PAMS48 HH MZO5 3PAMS36 HH MZO4 3PAMSH48 MZO5 ...

Page 52: ...4 connect to AC fan1 9 H PRO L RPO CN10 connect to high and low pressure swtich pin1 pin2 pin3 pin4 5VDC pulse wave 10 OLP TEMP SENSOR CN14 connect to compressor top temp sensor 5VDC Pulse wave 11 T2B CN11 connect to pipe temp sensor T2B 12 T3 T4 CN9 connect to pipe temp sensor T3 ambient temp sensor T4 13 Electronic Expansion valve CN15 connect to Electric Expansion Valve A CN23 connect to Electr...

Page 53: ...52 IPM board of 3PAMS48 HH MZO5 3PAMS36 HH MZO4 3PAMSH48 MZO5 ...

Page 54: ...Meaning 1 Power Supply CN3 connect to main board L Out CN2 connect to main board N Out 2 CN9 Connect to main PCB CN6 3 FAN_DC FAN_1 FAN_2 connect to outdoor DC fan 1 DC fan 2 4 CN_COMP U1 Connect to compressor V1 W1 ...

Page 55: ... Do not forget to discharge the electricity in the capacitors The value of resistance is about 1500 ohm to 2000 ohm Electrolytic Capacitors HIGH VOLTAGE CAUTION Bulb 25 40W The voltage in P3 and P4 in outdoor PCB is high voltage about 310V The voltage in P5 and P6 in outdoor PCB is high voltage about 310V ...

Page 56: ...meter error X Compressor top high temperature protection OLP X Compressor drive protection X Indoor units mode conflict Indoor fan speed malfunction X X In standby mode In force cooling mode flash at 5Hz light X extinguished flash at 0 5Hz For Old Duct Cassette Floor Ceiling MTBU 12HRDN1 M MTBU 12HRDN1 M B MTBU 18HRDN1 M MTB 24HRFN1 MW MCA2U 12HRFN1 M MCA2U 12HRFN1 M B MCA2U 18HRFN1 M MCD 24HRFN1 ...

Page 57: ...RDN1 M De frost Timer Auto Operation Failure Display Indoor unit EEPROM parameter error E0 Communication malfunction between indoor and outdoor units error E1 Zero crossing signal detection error E2 Indoor fan speed malfunction E3 X X Outdoor temperature sensor coil sensor T3 or ambient temperature sensor T4 malfunction or Outdoor unit EEPROM parameter error sensor E5 Indoor room temperature senso...

Page 58: ...FN1 MU0W MSMBD 18HRFN1 MT0W MSMBD 23HRFN1 MT0W 6 Fairwind MS12F 09HRFN1 MT0W A MS12F 12HRFN1 MT0W MS12F1 17HRFN1 MT0W MS12F1 22HRFN1 MS0W 7 New Duct CTBU 09HWFN1 M C CTBU 12HWFN1 M C CTBU 18HWFN1 M C CTBU 24HWFN1 M C 3PAMSDH09 3PAMSDH12 3PAMSDH18 3PAMSDH24 8 New Cassette CCA3U 09HRFN1 M C CCA3U 12HRFN1 M C CCA3U 18HRFN1 M C MCDU 24HRFN1 M C 9 New Console Floor Ceiling CFAU 09HRFN1 M C CFAU 12HRFN1...

Page 59: ... optional lift panel not closed 11 times FA Communication error between indoor two chips For A6 Duct 1 time P0 Inverter module IPM malfunction P6 2 times P1 Over voltage or under voltage protection E5 3 times P2 High temperature protection of compressor top OLP High temperature protection of IPM board 4 times P3 Low ambient temperature protection LP 5 times P4 Compressor drive malfunction 6 times ...

Page 60: ... EL 0C Refrigerant leakage detection 7 times PC 00 Inverter module IPM malfunction P6 2 times PC 01 Over voltage or under voltage protection E5 3 times PC 02 High temperature protection of compressor top OLP High temperature protection of IPM board 4 times PC 0L Low ambient temperature protection LP 5 times PC 04 Compressor drive malfunction 1 time Indoor units mode conflict 7 times PC 03 Low pres...

Page 61: ...nit is horse power If the indoor unit is not connected the digital display shows the following 9K 1HP 12K 1 2HP 18K 1 5HP 24K 2 0HP 4 Indoor unit B capacity 5 Indoor unit C capacity 6 Indoor unit D capacity 7 Indoor unit E capacity 8 Indoor unit A capacity demand code Norm code HP 9K 1HP 12K 1 2HP 18K 1 5HP 24K 2 0HP 9 Indoor unit B capacity demand code 10 Indoor unit C capacity demand code 11 Ind...

Page 62: ...mperature T4 34 Compressor discharge temperature TP The display value is between 30 129 If the temperature is lower than 30 the digital display shows 30 If the temperature is higher than 99 the digital display shows single and double digits For example if the digital display shows 0 5 the compressor discharge temperature is 105 35 AD value of current The display value is a hex number For example t...

Page 63: ...I valve open angle only for 3PAMS48 HH MZO5 55 EVI valve angle only for 3PAMS48 HH MZO5 For M2OA 18HFN1 M Number of Presses Display Remark 0 Normal display Displays running frequency running state or malfunction code 1 Quantity of indoor units with working connection Actual data Display Number of indoor unit 1 1 2 2 3 3 4 4 5 5 2 Outdoor unit running mode code Off 0 Fan only 1 Cooling 2 Heating 3 ...

Page 64: ...rature T2A If the temperature is lower than 9 the digital display shows 9 If the temperature is higher than 70 the digital display shows 70 If the indoor unit is not connected the digital display shows 28 Indoor unit B evaporator temperature T2B 29 Indoor unit C evaporator temperature T2C 30 Indoor unit D evaporator temperature T2D 31 Indoor unit E evaporator temperature T2E 32 Condenser pipe temp...

Page 65: ...lay is featured on the outdoor PCB The LED displays different codes in the following situations Standby Compressor operation the running frequency Defrosting mode dF or alternative displays between running frequency and dF ach appears for 0 5s Forced cooling mode the LED displays FC or alternative displays between running frequency and FC each appears for 0 5s Compressor pre heating PH or alternat...

Page 66: ...door unit coil outlet temp sensor malfunction F2 No B Indoor unit coil outlet temp sensor malfunction F3 No C Indoor unit coil outlet temp sensor malfunction F4 No D Indoor unit coil outlet temp sensor malfunction F5 No E Indoor unit coil outlet temp sensor malfunction F6 No F Indoor unit coil outlet temp sensor malfunction P0 High temperature protection of compressor top P2 P1 High pressure prote...

Page 67: ...phase protection PC 44 Outdoor unit zero speed protection PC 45 Outdoor unit IR chip drive failure PC 46 Compressor speed has been out of control PC 49 Compressor overcurrent failure PC 30 High pressure protection For M4OB 36HFN8 Q M5OD 42HFN8 Q M5OE 42HFN8 Q PC 31 Low pressure protection For M4OB 36HFN8 Q M5OD 42HFN8 Q M5OE 42HFN8 Q PC 0A High temperature protection of condenser PC 06 Temperature...

Page 68: ...oor PCB main chip does not receive feedback from EEPROM chip Potential causes Installation mistake Faulty PCB Trouble shooting Yes Replace the indoor outdoor main PCB Power off then restart the unit 3 minutes later Does a problem still remain EEPROM a type of read only memory The contents can be erased and reprogrammed using a pulsed voltage To locate the EEPROM chip ...

Page 69: ...between indoor and outdoor units diagnosis and solution Malfunction conditions If indoor unit does not receive the feedback from outdoor unit during 120 seconds Potential causes Wiring mistake Faulty indoor or outdoor PCB Trouble shooting ...

Page 70: ...by remote controller Is all indoor unit display Turn off the all indoor units Is IPM power LED or operating LED lamp On Refer PIC2 Yes A Is all the wiring between terminal and Indoor PCB connect ok No Yes A No Reconnect the wiring Is indoor units number correct Check on the outdoor check point 2 for dual zone 3 for tri zone 4 for qua zone Refer PIC 4 Yes No first time Yes Yes Change the Indoor PCB...

Page 71: ...ltage between 2 old L2 port and S port of outdoor unit The red pin of multimeter connects with 2 old L2 port while the black pin is for S port When AC is normal running the voltage will move alternately between positive value and negative value ...

Page 72: ...71 Operating els Standby Pic 2 IPM for 2 zone 3 zone ...

Page 73: ...72 PIC3 Main board LED when power on and unit standby Pic 2 IPM for 4 zone 5 zone Power Standby Operating els ...

Page 74: ...ro crossing signal time interval is abnormal Potential causes Connection mistake Faulty PCB Trouble shooting Check if the connections and power supply is normal Correct the connections Turn on the unit when the power supply is good No Yes Indoor main PCB is defective Replace indoor main PCB PIC 4 Check point button press 1 time for check how many indoor units are connected ...

Page 75: ...tor Faulty PCB Trouble shooting Power off then restart the unit after 3 minutes Does a problem remain Shut off the power supply Rotate the fan by hand Does it turn easily The unit is operating normally Find the cause of the problem and resolve it Check the wiring of fan motor Is it improperly wired No Yes No Correct the connections No No Replace the fan motor Yes Yes Measure the voltage for the fa...

Page 76: ...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 to be replaced For other models DC motor voltage input and output NO Color Signal Voltage 1 Red Vs Vm 200V ...

Page 77: ... the LED displays a failure Potential causes Wiring mistake Faulty sensor Faulty PCB Trouble shooting Check the connections between temperature sensor and PCB Are the connections good Correct the connections No Yes Yes Replace indoor or outdoor PCB Replace the sensor Check the resistance value of the sensor via Appendix 1 and Appendix 2 Is it normal No ...

Page 78: ...tion conditions When the voltage signal that IPM send to compressor drive chip is abnormal the display LED will show P6 and AC will turn off Potential causes Wiring mistake IPM malfunction Faulty outdoor fan assembly Compressor malfunction Faulty outdoor PCB Trouble shooting ...

Page 79: ... No Replace the compressor 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 Ch...

Page 80: ...heck the voltage of outdoor unit power supply whether the voltage between L L1 and N L2 is about 187 253VAC 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 36KBtu h Replace bridge rectifiers and then check whether the system can run normally Only for qua zone Replace IPM board and then check whether the system can run normal...

Page 81: ...well If the water level switch is inserted well No Insert the water level switch well Insert the water level switch well If the water level switch is broken If the water level switch is broken Yes Replace the water level switch Replace the water level switch Replace the water pump If malfunction is still not solved Replace the water pump If malfunction is still not solved Yes No Yes Replace the in...

Page 82: ...g in cooling mode or fan mode and indoor unit B is set to heating mode then A will change to off and B will work in heating mode Suppose Indoor unit A working in heating mode and indoor unit B is set to cooling mode or fan mode then B will change to stand by and A will be no change Cooling mode Heating Mode Fan Off Cooling mode No Yes No No Heating Mode Yes No Yes No Fan No Yes No No Off No No No ...

Page 83: ...electronic control box is Installed good Check whether electronic control box is Installed good Check whether thermal grease is no coating or uneven coating Check whether thermal grease is no coating or uneven coating Yes Yes No Install the electronic control box correctly Install the electronic control box correctly Fix the radiator well Fix the radiator well Coat thermal grease again Coat therma...

Page 84: ...restart the unit after 2 minutes Does the error still exist Replace the display board Does a problem remain The unit is operating normally NO Check the wirings and connections YES Are all the connections good Ensure proper connections NO YES Replace the indoor main PCB The problem is solved NO ...

Page 85: ...r blockages and clear blockages if present Does a problem remain Put your hands in front of the indoor air outlet YES Is there cool air blowing out from indoor air outlet Is it securely attached Replace the indoor PCB YES Check the T2 sensor YES Check system for leakages NO NO Repair the leakage and recharge the refrigerant YES NO ...

Page 86: ... Communication malfunction between indoor two chips Shut off the power supply and turn it on 2 minutes later Is it still displaying the error code YES Replace the indoor main PCB The unit is operating normally NO ...

Page 87: ...hip Potential causes Installation mistake Faulty PCB Trouble shooting Yes Replace the outdoor main PCB Replace the outdoor main PCB Power off then restart the unit 3 minutes later Power off then restart the unit 3 minutes later Outdoor EEPROM malfunction Outdoor EEPROM malfunction EEPROM a type of read only memory The contents can be erased and reprogrammed using a pulsed voltage refer to the foll...

Page 88: ...lution Error Code E2 EL 01 Malfunction conditions Indoor unit does not receive the feedback from outdoor unit during 120 seconds or outdoor unit does not receive the feedback from any one indoor unit during 180 seconds Potential causes Wiring mistake Faulty Indoor or outdoor PCB Trouble shooting ...

Page 89: ...oor unit by remote controller Is all indoor unit display Turn off the all indoor units Is IPM power LED or operating LED lamp On Refer PIC2 Yes A Is all the wiring between terminal and Indoor PCB connect ok No Yes A No Reconnect the wiring Is indoor units number correct Check on the outdoor check point 2 for dual zone 3 for tri zone 4 for qua zone Refer PIC 4 Yes No first time Yes Yes Change the I...

Page 90: ...ltage between 2 old L2 port and 3 port of outdoor unit The red pin of multimeter connects with 2 old L2 port while the black pin is for 3 port When AC is normal running the voltage will move alternately between positive value and negative value ...

Page 91: ...90 Operating els Standby Pic 2 IPM board for 2 zone 3 zone ...

Page 92: ...91 PIC3 Main board LED when power on and unit standby Pic 2 IPM for 4 zone 5 zone Power Standby Operating els ...

Page 93: ...92 PIC 4 Check point button press 1 time for check how many indoor units are connected ...

Page 94: ...ing Communication malfunction between IPM board and outdoor main board Is there at least one LED in the IPM board light Check the signal wire between the IPM module and the main board is it connected good Reconnect and retry Is error still display Replace IPM board and then check whether the system can run normally Replace the electric control box No No No No Yes Trouble is solved No Yes Replace o...

Page 95: ...to test the DC voltage between black pin and white pin of signal wire The normal value should be around 5V Use a multimeter to test the DC voltage between black pin and red pin of signal wire The normal value should be around 12V ...

Page 96: ...r has short circuited EC 54 Evaporator coil outlet temperature sensor T2B is in open circuit or has short circuited EC 56 Error Code E4 F1 F2 F3 F4 F5 EC 52 EC 53 EC 54 EC 56 EC 50 Malfunction conditions If the sampling voltage is lower than 0 06V or higher than 4 94V the LED will display the failure Potential causes Wiring mistake Faulty sensor Faulty PCB Trouble shooting Check the connections be...

Page 97: ... Voltage protection Check the voltage of outdoor unit power supply whether the voltage between L L1 and N L2 is about 187 264VAC Check the power supply Check whether the voltage of IPM board P and N GND is normal DC277 356V for 2 zone 18K Btu h 3 zone 27K Btu h DC277 410V For 4 zone 36K Btu h 5 zone 48K Btu h Replace bridge rectifiers and then check whether the system can run normally for 5 zone R...

Page 98: ... zone P or E1 E2 E3 N GND for 2 zone 3 zone Bridge rectifier for 2 zone 3 zone Bridge rectifier for 2 zone 3 zone IPM Module for 2 zone 3 zone Remark Measure the DC voltage between and port The normal value should be 190V 250V ...

Page 99: ...98 IPM board for 4 zone ...

Page 100: ...99 IPM board for 5 zone Bridge rectifier for 5 zone Remark Measure the DC voltage between and port The normal value should be 190V 250V IPM Module for 5 zone ...

Page 101: ...ode E6 PC 0F Malfunction conditions When the voltage signal that PFC sends to main control board is abnormal the display LED will show E6 and AC will turn off Potential causes Wiring mistake Faulty outdoor PCB Faulty inductance of PFC module PFC module malfunction Trouble shooting ...

Page 102: ...e of P N on IPM module is normal DC277 356V for 18 27KBtu h DC277 410V for 36KBtu h No Check whether the inductance of PFC module is good If the inductance is good the resistance of the two ports is 0 Yes Replace the inductance No Connect it tightly check normal or not Replace the outdoor main board Yes Yes No No Replace the PFC module IPM module Trouble is solved ...

Page 103: ...102 Two ports of the inductance Inductance ...

Page 104: ...y rotate the fan by hand Does it rotate properly Shut off the power supply rotate the fan by hand Does it rotate properly The unit operates normally The unit operates normally Find out the cause and have it solved For example whether the fan is blocked or the screws which fix the fan are tighten Find out the cause and have it solved For example whether the fan is blocked or the screws which fix th...

Page 105: ... 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 200 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 106: ...105 Vs Vcc Vsp FG ...

Page 107: ... Release the UVW connector Measure the resistance of U V U W and V W If the resistances are not equal to each other the fan motor may be experiencing problems and need to be replaced Otherwise the PCB must has problems and need to be replaced ...

Page 108: ...ion diagnosis and solution Error Code P1 PC 30 Malfunction conditions If the sampling voltage is not 5V the LED will display the failure Potential causes Wiring mistake Faulty over load protector System block Faulty outdoor PCB Trouble shooting ...

Page 109: ... 50 Check whether the outdoor ambient temperature is higher than 50 No Stop the unit Stop the unit Yes Check if the outdoor unit ventilation is good Check if the outdoor unit ventilation is good Yes Make the outdoor unit ventilate well Make the outdoor unit ventilate well Check whether the heat exchanger is dirty Check whether the heat exchanger is dirty No Clean the heat exchanger Clean the heat ...

Page 110: ...109 ...

Page 111: ...on diagnosis and solution Error Code P2 PC 31 Malfunction conditions If the sampling voltage is not 5V the LED will display the failure Potential causes Wiring mistake Faulty over load protector System block Faulty outdoor PCB Trouble shooting ...

Page 112: ...the low pressure protector is broken Check whether the outdoor ambient temperature is too low Check whether the outdoor ambient temperature is too low No Stop the unit Stop the unit Yes Open fully valve core of high pressure valve Open fully valve core of high pressure valve No Check whether valve core of high pressure valve is opened Check whether valve core of high pressure valve is opened Check...

Page 113: ...112 ...

Page 114: ... of control PC 49 Compressor overcurrent failure diagnosis and solution Error Code P3 PC 08 PC 44 PC 46 PC 49 Malfunction conditions If the outdoor current exceeds the current limit value the LED will display the failure Potential causes Wiring mistake Faulty over load protector System block Faulty outdoor PCB Trouble shooting ...

Page 115: ...nt temperature is higher than 50 No Stop the unit Yes Judge 3 Check whether the outdoor unit is bad ventilation No Make the outdoor unit ventilate well Yes Judge 5 The refrigerant pipe is blocked No Let the refrigerant out then use the high pressure nitrogen or refrigerant to blow pipe vacuumize and charge the refrigerant again Yes Judge 4 Check whether the heat exchanger is dirty No Clean the hea...

Page 116: ...115 ...

Page 117: ... Code P4 PC 06 Malfunction conditions When the compressor discharge temperature T5 is more than 115 for 10 seconds the compressor will stop and restart till T5 is less than 90 Potential causes Refrigerant leakage Wiring mistake Faulty discharge temperature sensor Faulty outdoor PCB Trouble shooting ...

Page 118: ...value is not normal is normal refer to the Appendix 2 No Yes Yes No Correct the wiring connection Correct the wiring connection Stop leaking and add refrigerant Stop leaking and add refrigerant Replace the compressor discharge temp sensor Replace the compressor discharge temp sensor No Yes Replace high pressure valve assy Replace high pressure valve assy Yes No Replace outdoor main PCB Replace out...

Page 119: ...er Clean the heat exchanger Yes Check whether the refrigerant system is ok Check whether the refrigerant system is ok Replace outdoor main board Replace outdoor main board No Refrigerant is not enough add the refrigerant Refrigerant is not enough add the refrigerant No Check if the outdoor fan runs properly Check if the outdoor fan runs properly please refer to the solution of fan speed has been o...

Page 120: ...119 Faulty outdoor PCB Trouble shooting ...

Page 121: ...e main board check whether the system can work normally No Replace the compressor 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 ...

Page 122: ...inlet and outlet or the heat exchanger of indoor and outdoor units Yes No Yes Yes Turn off the power supply and turn it on 10 minutes later Check if the temperature of compressor Top Is more than 90 No Check if the refrigerant system is normal Repair the refrigerant system Replace the outdoor control PCB Yes Check if all the connection especially the connection of OLP Over Load Protector sensor is...

Page 123: ...restart the unit 2 minutes later Is it still displaying the error code The unit operates normally Check the wiring of fan motor Are all the connections good Correct the connections Check whether the three phase resistance of the fan is symmetrical Replace the fan motor Yes Yes Yes No No No Replace the main PCB No Trobule is solved Yes ...

Page 124: ...nit operates normally Check both ends of compressor connecting line Are all the connections good Correct the connections Check whether the three phase resistance of the compressor is symmetrical Replace the compressor Yes Yes Yes No No No Replace the main PCB No Trobule is solved Yes 7 4 2 17 Outdoor unit IR chip drive failure PC45 Power off then restart the unit 2 minutes later Replace the invert...

Page 125: ...get warm Potential causes Faulty EXV Wire and piping connected in reverse Check of EXV please refer to part 6 in 9 5 Trouble Criterion Of Main Parts 7 4 2 20 Automatic correction of wiring piping error Press the check switch on the outdoor unit PCB board 5 seconds until LED display CE which mean this function is working Approximately 5 10 minutes after the switch is pressed the CE disappear the wi...

Page 126: ...apter board Supposed causes Wiring mistake Faulty PCB YES Power off then restart the unit after 3 minutes Does the error still exist Replace the outdoor main control board Does a problem remain The unit is operating normally NO Check the wirings and connections YES Are all the connections good Ensure proper connections NO YES Replace the adapter main PCB The problem is solved NO ...

Page 127: ...ure sensor from PCB 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 128: ...16 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 99815 125 0 ...

Page 129: ...128 ...

Page 130: ...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 46 22 89 86 5 663 1...

Page 131: ... 33 34 35 74 76 78 80 82 84 86 88 90 92 94 96 98 2 Compressor check Measure the resistance value of each winding by using the tester Position Resistance Value ATM150D23UFZ ATF235D22UMT ATF250D22UMT ATF310D43UMT ATQ360D1UMU ATQ420D1UMU EAPQ420D1UMUA Blue Red 1 72 Ω 0 75 Ω 0 75 Ω 0 65 Ω 0 37 Ω 0 38Ω 0 1Ω Blue Black Red Blue ...

Page 132: ...sistance value Red Black Several MΩ Red Black Several MΩ P N U N U V V W W Red 4 AC Fan Motor Measure the resistance value of each winding by using the tester Position Resistance Value RPG20B RPG28H Black Red 381Ω 8 20 Brand Weiling 342Ω 8 20 Brand Dayang 183 6Ω 8 20 Brand Weiling 180Ω 8 20 Brand Wolong White Black 267Ω 8 20 Brand Weiling 253Ω 8 20 Brand Dayang 206Ω 8 20 Brand Weiling 190Ω 8 20 Br...

Page 133: ...9Ω 8 20 252Ω 8 20 88Ω 8 20 150Ω 8 20 374 3Ω 8 20 138Ω 8 20 Yellow Blue 76Ω 8 20 19Ω 8 20 252Ω 8 20 88Ω 8 20 150Ω 8 20 374 3Ω 8 20 138Ω 8 20 5 4 way valve 1 Power on use a digital tester to measure the voltage when the unit operates in cooling it is 0V When the unit operates in heating it is about 230VAC If the value of the voltage is not in the range the PCB must have problems and need to be repla...

Page 134: ...133 2 Turn off the power use a digital tester to measure the resistance The value should be 1 8 2 5 KΩ 6 EXV check Disconnect the connectors ...

Page 135: ...134 Resistance to EXV coil Color of lead wire Normal Value Red Blue About 50Ω Red Yellow Brown Orange Brown White 6 5 4 3 2 1 Red Brown Blue Orange Yellow White ...

Page 136: ...135 Red Blue Red Yellow Brown Orange ...

Page 137: ...136 Brown White ...

Page 138: ... metal plate No Part name Procedures Remarks 1 Fan assembly How to remove the fan assembly 1 Turn off the air conditioner and turn off the power breaker 2 Remove the screws of air outlet grille 4 screws 3 Remove the hex nut fixing the fan 4 Remove the fan 5 Remove the screws of top cover and remove the top 4s cr e w s Screws of top cover ...

Page 139: ...t the fan motor connector CN14 3p white from the IPM board 8 Remove the fan motor after unfastening four fixing screws 2 Panel plate How to remove the panel plate 1 Remove the screws of front panel and remove the front panel 6 screws Screws of front panel Screws of front panel ...

Page 140: ...he big handle 4 screws 3 Remove two screws of terminal board and seven screws of right rear panel and remove the right rear panel Screws of big handle Screws of terminal board Screws of right rear panel Screws of right rear panel Screws of front panel ...

Page 141: ...connector of the reactor 4 Unfasten the connector of the compressor 5 Disconnect following 3 pieces of connection wires and connectors between IPM and main control PCB CN1 5p white CN14 3p white CN4 red or brown CN5 blue 6 Remove the IPM board 7 Disconnect the connectors and wires connected from PCB and other parts Connectors IPM board PCB board ...

Page 142: ...expansion valve A B 6p 6p red red CN25 CN23 S A S B 3p 3p white white Wires CN1 CN2 4 way valve blue blue CN5 CN6 Crankcase heating cable red red CN3 L IN red CN4 N IN black 8 Disconnect the grounding wire yellow green after removing the big handle and the right rear panel 9 Remove the PCB board CN17 CN7 CN15 CN1 CN2 CN5 CN6 CN3 CN4 CN18 CN19 CN25 CN23 ...

Page 143: ...as 4 Remove the sound insulation material and crankcase heating cable 5 Remove terminal cover of compressor and disconnect wires of crankcase electric heater and compressor from the terminal 6 Remove the discharge pipe and suction pipe with a burner 7 Remove the hex nuts and washers fixing the compressor to bottom plate 8 Lift the compressor ...

Page 144: ...crews of reactor and remove the reactor 6 The 4 way valve How to remove the 4 way valve 1 Perform work of item 2 2 Extract refrigerant gas 3 Remove the electrical parts from item 3 4 Remove fixing screw of the coil and remove the coil 5 Detach the welded parts of 4 way valve and pipe Screws of cover of inductance Coil Welded parts ...

Page 145: ...and pipes 3PAMSH18 MZO2 WX430 metal plate No Part name Procedures Remarks 1 Panel plate How to remove the panel plate 1 Turn off the air conditioner Turn off the power breaker 2 Remove the screws of big handle and remove the big handle 3 screws 3 Remove the screws of top cover and remove the top cover 3 screws Coils Expansion valves Screws of top cover Screws of big handle Screws of top cover ...

Page 146: ...e the screws of front panel and remove the front panel 7 screws 5 Remove the screws of water collector and remove the water collector 3 screws Screws of water collector Screws of front panel Screws of front panel ...

Page 147: ...de panel and remove the right side panel 2 Fan assembly How to remove the fan assembly 1 Remove the top cover right side panel and front panel from item 1 step 1 6 2 Remove the hex nut fixing the fan 3 Remove the fan Screws of terminal board Screws of right side board ...

Page 148: ...e electrical parts 1 Perform work of item 1 2 Remove 5 screws of the cover of electrical control box cover and remove it 3 Cut the ribbon by a shear and disconnect the 4 way valve connector CN38 2p blue 4 Turn over the main board 5 Remove the electronic installing box subassembly 4 hooks 4s cr e w s ...

Page 149: ...rt of electronic control box 7 Disconnect the connectors and wires connected from PCB and other parts 8 Disconnect the grounding wire yellow green after removing the big handle and the right rear panel 9 Remove the PCB board ...

Page 150: ...rigerant gas 4 Remove the sound insulation material and crankcase heating cable 5 Remove terminal cover of compressor and disconnect wires of compressor thermo and compressor from the terminal 6 Remove the discharge pipe and suction pipe with a burner 7 Remove the hex nuts and washers fixing the compressor to bottom plate 8 Lift the compressor ...

Page 151: ...em 3 4 Remove fixing screw of the coil and remove the coil 5 Detach the welded parts of 4 way valve and pipe 6 The expansion valve How to remove the expansion valve 1 Perform work of item 1 2 2 Remove the electrical parts from item 3 3 Remove the coils 4 Detach the welded parts of expansion valves and pipes Coil Welded parts Expansion valves ...

Page 152: ...ff the power breaker 8 Remove the screws of big handle and remove the big handle 4 screws 9 Remove the screws of top cover and remove the top cover 4 screws 10 Remove the screws of right front side panel and remove the right front side panel 1 screws 11 Remove the screws of front panel and remove the front panel 8 screws Screws of top cover Screws of front panel Screws of big handle Screws of top ...

Page 153: ...wo screws of terminal board screws of water collector and fifteen screws of right rear panel and remove the right rear panel Screws of front panel Screws of right rear panel Screws of front panel Screws of front panel ...

Page 154: ...assembly How to remove the fan assembly 5 Remove the top cover right front side panel and front panel from item 1 step 1 4 6 Remove the hex nut fixing the fan 7 Remove the fan 4s cr e w s Screws of terminal board ...

Page 155: ...rd 10 Remove the fan motor after unfastening four fixing screws 3 Electrical parts How to remove the electrical parts 10 Perform work of item 1 2 11 Remove the four screws fixing the IPM board 12 Unfasten the connector of the reactor 13 Unfasten the connector of the compressor 14 Disconnect following 3 IPM board PCB board ...

Page 156: ...wn CN5 blue 15 Remove the IPM board 16 Disconnect the connectors and wires connected from PCB and other parts Connectors CN17 T3 T4 temperature sensor 2p 2p white CN7 Discharge temperature sensor 2p white CN15 T2B A B C temperature sensor 2p 2p 2p white CN18 CN19 CN22 Electronic CN15 CN7 CN17 CN18 CN19 CN22 ...

Page 157: ...hite white white Wires CN1 CN2 4 way valve blue blue CN5 CN6 Crankcase heating cable red red CN3 L1 IN red CN4 L2 IN black 17 Disconnect the grounding wire yellow green after removing the big handle and the right rear panel 18 Remove the PCB board CN1 CN2 CN3 CN5 CN6 CN4 CN20 CN23 CN25 ...

Page 158: ...igerant gas 12 Remove the sound insulation material and crankcase heating cable 13 Remove terminal cover of compressor and disconnect wires of compressor thermo and compressor from the terminal 14 Remove the discharge pipe and suction pipe with a burner 15 Remove the hex nuts and washers fixing the compressor to bottom plate 16 Lift the compressor ...

Page 159: ...s of wires connected from the cover of inductance 5 Remove four screws of reactor and remove the reactor 6 The 4 way valve How to remove the 4 way valve 6 Perform work of item 1 2 7 Extract refrigerant gas 8 Remove the electrical parts from item 3 9 Remove fixing screw of the coil and remove the coil 10 Detach the welded parts of 4 way valve and pipe Screws of cover of inductance Screws of reactor...

Page 160: ...cedures Remarks 1 Panel plate How to remove the panel plate 1 Turn off the air conditioner Turn off the power breaker 2 Remove the screws of big handle and remove the big handle 4 screws 3 Remove the screws of top cover and remove the top cover 4 screws 4 Remove the screws of right front side panel and remove the right front side panel 1 screw 5 Remove the screws of front Expansion valves Screws o...

Page 161: ...move two screws of terminal board screws of water collector and fifteen screws of right rear panel and remove the right rear panel Screws of front panel Screws of front panel Screws of right front side panel Screws of front panel Screws of front panel ...

Page 162: ... assembly How to remove the fan assembly 1 Remove the top cover right front side panel and front panel from item 1 step 1 4 2 Remove the hex nut fixing the fan Screws of right rear panel Screws of terminal board ...

Page 163: ...from the driver board 6 Remove the fan motor after unfastening four fixing screws 3 Electrical parts How to remove the electrical parts 1 Perform work of item 1 2 2 Unfasten the connector of the reactor 3 Unfasten the connector of the compressor 4 Unfasten the connector of the PFC inductor 5 Disconnect following 3 Driver board PCB board 4s cr e w s ...

Page 164: ...rs CN8 T3 T4 temperature sensor 2p 2p white CN33 Discharge temperature sensor 2p white CN13 T2B A B C D temperature sensor 2p 2p 2p 2p white CN18 CN17 CN21 CN20 Electronic expansion valve A B C D 6p 6p 6p red red red CN30 CN29 CN28 CN27 S A S B S C S D 3p 3p 3p 3p white CN9 High and low pressure switch 2p 2p white Wires CN3 CN22 4 way valve blue blue CN4 CN40 Crankcase heating cable black red CN55...

Page 165: ...rd 4 Compressor How to remove the compressor 1 Perform work of item 1 2 3 2 Remove the electrical control box and partition plate 3 Extract refrigerant gas 4 Remove the sound insulation material and crankcase heating cable 5 Remove terminal cover of compressor and disconnect wires of compressor thermo and compressor from the terminal CN13 CN33 CN3 CN4 CN10 CN22 CN40 CN44 CN2 CN1 ...

Page 166: ...k of item 1 2 2 Extract refrigerant gas 3 Remove the electrical parts from item 3 4 Remove fixing screw of the coil and remove the coil 5 Detach the welded parts of 4 way valve and pipe 6 The expansion valve How to remove the expansion valve 1 Perform work of item 1 2 2 Remove the electrical parts from item 3 3 Remove the coils 4 Detach the welded parts of expansion valves and pipes Coil Welded pa...

Page 167: ...plate No Part name Procedures Remarks 1 Fan assembly How to remove the fan assembly 1 Turn off the air conditioner Turn off the power breaker 2 Remove the screws of air outlet grille 8 screws 3 Remove the hex nut fixing the fan 4 Remove the fan ...

Page 168: ...r 4 screws 6 Remove the screws of front side panel and remove the front side panel 1 screw 7 Disconnect the fan motor connectors FAN1 3p white and FAN2 3p white from DC motor driver board 8 Remove the fan motor after unfastening fixing screws Screws of top cover ...

Page 169: ... board and 15 screws of right rear panel and remove the right rear panel 3 Electrical parts How to remove the electrical parts 1 Perform work of item 1 step 5 6 and item 2 IPM board PCB board Screws of Water collector Screws of big handle DC Fan Driver board Screws of right rear panel Screws of terminal board Screws of right rear panel ...

Page 170: ...following 8 pieces of connection wires and connectors between IPM and other parts CN2 yellow CN1 red CN6 black CN3 yellow U V W black CN9 10p white 4 Remove the fixing screws then remove the IPM board 5 Disconnect the connectors and wires connected from PCB and other parts Connectors ...

Page 171: ...6 CN13 S A S B S C S D S E 3p 3p 3p 3p 3p white CN10 High and low pressure switch 2p 2p white Wires CN17 CN18 4 way valve blue blue CN19 CN20 connected to crankcase heating cable black red CN24 CN25 Electric heater of chassis orange orange CN1 L IN red CN3 N IN black 6 Disconnect the grounding wire yellow green after removing the big handle 7 Remove the PCB board CN17 CN18 CN19 CN20 CN24 CN25 CN13...

Page 172: ...e sound insulation material and crankcase heating cable 4 Remove terminal cover of compressor and disconnect wires of crankcase electric heater and compressor from the terminal 5 Remove the discharge pipe and suction pipe with a burner 6 Remove the hex nuts and washers fixing the compressor to bottom plate 7 Lift the compressor ...

Page 173: ...s from item 3 9 Remove fixing screw of the coil and remove the coil 10 Detach the welded parts of 4 way valve and pipe 6 The expansion valve How to remove the expansion valve 5 Perform work of item 1 2 6 Remove the electrical parts from item 3 7 Remove the coil 8 Detach the welded parts of expansion valves and pipes Coil Welded parts Expansion valves ...

Page 174: ...ks 1 Fan assembly How to remove the fan assembly 1 Turn off the air conditioner Turn off the power breaker 2 Remove the screws of air outlet grille 8 screws 3 Remove the hex nut fixing 4 the fan 5 Remove the fan 6 Remove the screws of top cover and remove the top cover 4 screws Screws of top cover ...

Page 175: ...N2 3p white from DC motor driver board 10 Remove the fan motor after unfastening fixing screws 2 Panel plate How to remove the panel plate 6 Remove big handle 2 screws and water collector 2 screws 7 Remove 2 screws of terminal board and 15 screws of right rear panel and remove the right rear panel Screws of Water collector Screws of big handle ...

Page 176: ...e electrical parts 1 Perform work of item 1 step 5 6 and item 2 2 Disconnect the fan motor Connector 5p white from the IPM board IPM board PCB board Adapter board Screws of right rear panel Screws of terminal board Screws of right rear panel ...

Page 177: ...odule board 5 Disconnect the connectors and wires connected from PCB and other parts Connectors CN8 Discharge temperature sensor 2p white CN12 Heatsink temperature sensor 2p red CN9 T3 T4 temperature sensor 2p 2p white CN11 T2B A B C D E temperature sensor 2p 2p 2p 2p 2p white CN15 CN23 CN26 CN30 CN33 Electronic expansion valve 6p 6p 6p 6p 6p red CN7 CN13 CN16 CN21 CN29 CN37 CN30 CN23 CN33 CN26 CN...

Page 178: ... connected to crankcase heating cable black red CN24 CN25 Electric heater of chassis orange orange CN1 L IN red CN3 N IN black 6 Disconnect the grounding wire yellow green after removing the big handle 7 Remove the 4 screws and unfix the 6 hooks and then remove the main control board 8 Remove the 2 screws and then remove the adapter board assy Screws of adapter board ...

Page 179: ...e sound insulation material and crankcase heating cable 4 Remove terminal cover of compressor and disconnect wires of crankcase electric heater and compressor from the terminal 5 Remove the discharge pipe and suction pipe with a burner 6 Remove the hex nuts and washers fixing the compressor to bottom plate 7 Lift the compressor ...

Page 180: ...ts from item 3 4 Remove fixing screw of the coil and remove the coil 5 Detach the welded parts of 4 way valve and pipe 6 The expansion valve How to remove the expansion valve 1 Perform work of item 1 2 2 Remove the electrical parts from item 3 3 Remove the coil 4 Detach the welded parts of expansion valves and pipes Coil Welded parts Expansion valves ...

Page 181: ...Printed in China 0422_M949 844 4PA AIRE 844 472 2473 support perfectaire us CANADA SUPPORT 877 997 2473 supportcanada perfectaire us www perfectaire us 5401 Dansher Road Countryside IL 60525 ...

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