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York YU2E18YJ6AMHO-Y Service Manual

York YU2E18YJ6AMHO-Y Service Manual

Multi split inverter r410a 60hz
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Multi split inverter
Form: MYUSEJ6AMHO-Y-190409
Service Manual
New Released
Multi split inverter R410a 60Hz HP SERIES
YU2E18YJ6AMHO-Y
YU3E27YJ6AMHO-Y
YU4E36YJ6AMHO-Y
YU5E48YJ6AMHO-Y
Issue Date
Apr. 9, 2019

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Summary of Contents for York YU2E18YJ6AMHO-Y

  • Page 1 Multi split inverter Form: MYUSEJ6AMHO-Y-190409 Service Manual New Released Multi split inverter R410a 60Hz HP SERIES YU2E18YJ6AMHO-Y YU3E27YJ6AMHO-Y YU4E36YJ6AMHO-Y YU5E48YJ6AMHO-Y Issue Date Apr. 9, 2019...

  • Page 2: Table Of Contents

    7.2 Indoor Unit Error Display ..........................28 7.3 Outdoor Unit Display ..........................28 7.4 Diagnosis and Solution ..........................33 7.5 Trouble Criterion of Main Parts........................84 Disassembly Instructions ..........................95  YU2E18YJ6AMHO-Y (WCA30 metal plate) ..................95  YU3E27YJ6AMHO-Y (WD30 metal plate) ..................102...
  • Page 3  YU4E36YJ6AMHO-Y (WD30 metal plate) ..................110  YU5E48YJ6AMHO-Y (WE30 metal plate) ..................117...

  • Page 4: Indoor Unit Combination

    Indoor Unit Combination Suggeste Multi DC Outdoor Standard Limit Multi DC Outdoor Standard Suggested Unit Combination Combinati Limit Unit Combination Combination high wall YU2E18YJ6AMHO 9+9； 9+12 None 9+12 Duct: 9+9 12+12 9+18 9+24 Multi DC Standard Suggested 12+12 Limit Outdoor Unit Combination Combination 12+18...
  • Page 5 9+12+12+24 Multi DC Outdoor Standard Suggested Limit Unit Combination Combination 9+12+18+18 9+18 9+18+18+18 9+24 12+12+12+12 12+12 12+12+12+18 12+18 12+12+12+24 12+24 12+12+18+18 18+18 9+9+9+9+9 18+24 9+9+9+9+12 24+24 9+9+9+9+18 9+9+9 9+9+9+9+24 9+9+12 9+9+9+12+12 9+9+18 9+9+9+12+18 9+9+24 9+9+9+18+18 9+12+12 9+9+12+12+12 9+12+18 9+9+12+12+18 9+12+24 9+12+12+12+12 9+18+18 9+12+12+12+18...

  • Page 6: Dimension Of Outdoor Unit

    Dimension Of Outdoor Unit Model Unit YU2E18YJ6AMHO-Y inch 33.3 14.3 27.6 36.0 21.3 13.8 1034 YU3E27YJ6AMHO-Y inch 37.2 16.5 31.9 40.6 26.5 15.9 1034 YU4E36YJ6AMHO-Y inch 37.2 16.5 31.9 40.6 26.5 15.9...
  • Page 7 Unit Model 1333 1060 inch 37.5 16.3 52.5 41.7 25.0 15.9 YU5E48YJ6AMHO-Y...

  • Page 8: Refrigerant Cycle Diagram

    Refrigerant Cycle Diagram 3.1 Refrigeration circuit drawing of YU2E18YJ6AMHO-Y INDOOR OUTDOOR EXV A CAPILLARY A LIQUID VALVE A CHECK VALVE EXV B CAPILLARY B LIQUID VALVE B Condenser temp. sensor CAPILLARY TUBE HEAT HEAT EXCHANGE T4 Ambient T1 Room EXCHANGE (EVAPORATOR) temp.
  • Page 9 3.3 Refrigeration circuit drawing of YU3E27YJ6AMHO-Y INDOOR OUTDOOR EXV A CAPILLARY A LIQUID VALVE A EXV B CAPILLARY B CHECK VALVE LIQUID VALVE B EXV C CAPILLARY C Condenser LIQUID VALVE C temp. sensor CAPILLARY TUBE HEAT HEAT EXCHANGE T4 Ambient T1 Room EXCHANGE (EVAPORATOR)
  • Page 10 3.5 Refrigeration circuit drawing of YU5E48YJ6AMHO-Y INDOOR OUTDOOR EXV A CAPILLARY A LIQUID VALVE A EXV B CAPILLARY B LIQUID VALVE B EXV C CAPILLARY C CHECK VALVE LIQUID VALVE C EXV D CAPILLARY D LIQUID VALVE D Condenser temp. sensor CAPILLARY TUBE EXV E CAPILLARY E LIQUID VALVE E...

  • Page 11: Installation Details

    ● Refrigerant pipe diameter different Installation Details according to indoor unit to be connected. When using the extension pipe, refer to the 4.1 Wrench torque sheet for installation tables below. ● When refrigerant pipe diameter is different Outside diameter Torque Additional tightening torque from that of the outdoor unit connector (18K inch...
  • Page 12 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 1. Completely tighten the flare nuts on the vacuum pump, connect it to the valve at the indoor and outdoor units.

  • Page 13: Adding Refrigerant After Long-Term System Operation

    4.5 Adding Refrigerant after Long-Term System Operation Procedure Procedure 1). Confirm that both the 2-way and 3-way valves are set to the opened position 1) Connect the charge hose to the 3-way service Remove the valve stem caps and confirm that the port and open the 2-way and 3-way valve.

  • Page 14: Evacuation After Servicing The Outdoor Unit Refrigeration Circuit

    valve. 4.7 Evacuation after servicing the outdoor unit refrigeration circuit 1. Evacuation of the complete refrigeration circuit, Indoor and outdoor unit. 1) Completely tighten the flare nuts of the indoor and outdoor units, confirm that both the 2-way and 3-way valves are set to the closed position.
  • Page 15 from the vacuum pump to the valve at the bottom of the cylinder. If the refrigerant is R410A, make the cylinder bottom up to ensure liquid charge. 2). Purge the air from the charge hose Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air (be careful of the liquid refrigerant).

  • Page 16: Electronic Function

    ---- If outdoor fan speed is lower than 100RPM 5. Electronic Function higher than 2400RPM for 60 seconds or more, the unit stops and LED displays failure code. 5.1 Abbreviation 5.3.4 Inverter Module Protection. T1: Indoor ambient temperature ---- The inverter protection module ensures that faults related to current, voltage, or temperature T2: Middle indoor heat exchanger coil does not damage the inverter.
  • Page 17 and shutdown current CoolT4Zone5I ℃ HeatT4Zone4I T4≥15℃ Heating current limit value HeatT4Zone3I 14＞T4≥10℃ Heating current limit value HeatT4Zone2I 9＞T4≥6℃ Heating current limit CoolT4Zone4I value HeatT4Zone1I 5＞T4 Heating current limit value HeatStopI Heating stop protection current value 5.3.7 Indoor / Outdoor Units Communication CoolT4Zone3I Protection If the indoor units do not receive the feedback...

  • Page 18: Control And Functions

    If the outdoor ambient temperature is higher than Note: The final result is an integer. the set frequency during oil return, the unit stops Use the following table and final capacity the oil return process. request to confirm the operating frequency. 5.3.11 Low Outdoor Ambient Temperature …...
  • Page 19 Capacity area Norm code (N) ℃ Standby Model Fmax=T4FREHEATMAX1 Fmax=T4FREHEATMAX2 Note: The final result is an integer. Fmax=T4FREHEATMAX3 Then modify it according to a T2 average (correction): Fmax=T4FREHEATMAX4 Note:Average value of T2：Sum T2 value of all Fmax=T4FREHEATMAX5 indoor units)/ (indoor units number Fmax=T4FREHEATMAX6 ℃...
  • Page 20 4) If the compressor cumulative running time Outdoor temperature ℃ reaches 120 minutes and T3<-15℃. Supper high fan speed Defrost Stop Conditions High fan speed If any one of the following conditions is satisfied, defrosting ends and the unit returns to normal Middle fan speed heating mode: Low fan speed...
  • Page 21 open. It opens to the target angle after the compressor starts. 3. The action priority for the EXVs is A-B-C-D-E. Increase fan speed increase LowCoolT3_ON 4. The compressor and outdoor fan commence operation only after EXV initializes. Keep current fan speed LowCoolT3_Down 5.4.4.1 Cooling Mode The initial open angle of the EXV depends on the...
  • Page 22 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 from heating to other modes, the four-way valve turns off after the compressor has been off for 2 consecutive minutes.

  • Page 23: Wiring Diagrams

    Wiring Diagrams 6.1 Wiring diagram of 1 drive 2 outdoor YU2E18YJ6AMHO-Y...
  • Page 24 6.2 Wiring diagram of 1 drive 3 outdoor YU3E27YJ6AMHO-Y...
  • Page 25 6.3 Wiring diagram of 1 drive 4 outdoor YU4E36YJ6AMHO-Y...
  • Page 26 6.4 Wiring diagram of 1 drive 5 outdoor YU5E48YJ6AMHO-Y...

  • Page 27: Troubleshooting

    Troubleshooting 7.1Safety Electricity is stored in capacitors, even when the power supply is shut off. 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 28: Indoor Unit Error Display

    7.2 Indoor Unit Error Display For All models(Wall mounted(Hi-Wall) series, Duct/Cassette/ Floor Ceiling): Timer Operation lamp Display LED STATUS Error lamp —— ★ 1 time Indoor unit EEPROM parameter error ★ 2 times Communication malfunction between indoor and outdoor units ——...
  • Page 29 Push SW1 to check the unit's status while running. The digital display shows the following codes each time the SW1 is pushed. Display Remark Number Presses Normal display Displays running frequency, running state, or malfunction code Quantity of indoor units with working connection Actual data Display Number of indoor unit...
  • Page 30 Outdoor unit amendatory capacity demand code The frequency corresponding to the total indoor units' amendatory capacity demand The frequency after the frequency limit The frequency sending to compressor control chip Indoor unit A evaporator outlet temperature (T Indoor unit B evaporator outlet temperature (T ℃...
  • Page 31 F indoor unit capacity F indoor unit capacity demand code F indoor unit evaporator outlet temperature (T F indoor unit room temperature (T F indoor unit evaporator temperature (T EXV open angle for F indoor unit 7.3.2 Outdoor Unit Digital Display A digital display is featured on the outdoor PCB.
  • Page 32 7.3.3 Outdoor unit error display Display LED STATUS New indoor Error Outdoor unit EEPROM parameter error Communication malfunction between indoor and outdoor units Communication malfunction between IPM board and outdoor main control —— board Outdoor temperature sensor (coil sensor T3,ambient sensor T4, Compressor F2/F1/F3/F6 discharge sensor T5、indoor coil outlet pipe sensor T2B) malfunction Over-voltage or under-voltage protection...

  • Page 33: Diagnosis And Solution

    7.4 Diagnosis and Solution 7.4.1 Indoor unit trouble shooting 7.4.1.1 Indoor unit EEPROM parameter error diagnosis and solution. Malfunction conditions Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip. Potential causes Installation mistake ● Faulty PCB ●...
  • Page 34 7.4.1.2 Communication malfunction between indoor and outdoor units diagnosis and solution. Malfunction conditions If indoor unit does not receive the feedback from outdoor unit during 120 seconds. ● Wiring mistake Potential causes ● Faulty indoor or outdoor PCB Trouble shooting:...
  • Page 35 Indoor / outdoor units communication error Start: Power off , then Power on the A/C by the Breaker. (reconnect the power wire). Is it still displaying the error code? Check wiring on the outdoor and indoor terminal follow the wiring diagram. Is all Reconnect the wiring connecting correctly? Reconnect the wiring...
  • Page 36 Pic 1: Use a multimeter to test the DC voltage 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 37 Pic 2: IPM (for 2 zone/ 3-zone) Operating Standby...
  • Page 38 Pic 2: IPM (for5 zone) Operating Standby Power PIC3: Main board LED when power on and unit standby.
  • Page 39 PIC 4: Check point button, press 1 time for check how many indoor units are connected. 7.4.1.3 Zero-crossing signal detection error diagnosis and solution. Malfunction conditions When PCB does not receive zero crossing signal feedback for 4 minutes or the zero crossing signal time interval is abnormal. ●...
  • Page 40 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 ●...
  • Page 41 Index 1: 1: Indoor AC fan motor Power on and set the unit running in fan mode at high fan speed. After running for 15 seconds, measure the voltage of pin1 and pin2. If the value of 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.
  • Page 42 7.4.1.5 Temperature sensor malfunction diagnosis and solution. If the sampling voltage is lower than 0.06V or higher than 4.94V, Malfunction conditions the LED displays a failure. Wiring mistake Potential causes ● Faulty sensor ● Faulty PCB ● Trouble shooting: Check the connections between temperature Correct the connections.
  • Page 43 7.4.1.6 Inverter module (IPM) malfunction diagnosis and solution. Malfunction 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. ● Wiring mistake Potential causes ● IPM malfunction ●...
  • Page 45 7.4.1.7 Over-voltage or under-voltage protection diagnosis and solution.
  • Page 46 7.4.1.8 Compressor drive malfunction diagnosis and solution The trouble shooting is same with one of IPM module protection. Water-level alarm malfunction 7.4.1.9 diagnosis and solution Malfunction conditions If the sampling voltage is not 5V, the LED will display the failure code. ●...
  • Page 47 7.4.1.10 Indoor units mode conflict Error Code P5(old model) or - -(new model) Malfunction conditions The indoor units cannot work cooling mode and heating at same time. Heating mode has a priority. ● Suppose Indoor unit A working in cooling mode or fan mode, and Potential causes indoor unit B is set to heating mode, then A will change to off and B will work in heating mode.
  • Page 48 7.4.1.11 High temperature protection of IPM board diagnosis and solution...
  • Page 49 7.4.2 Outdoor unit trouble shooting 7.4.2.1 E0 (Outdoor unit EEPROM parameter error) diagnosis and solution Error Code Malfunction PCB main chip does not receive feedback from EEPROM chip conditions ● Installation mistake Potential causes ● Faulty PCB Trouble shooting: Outdoor EEPROM malfunction Outdoor EEPROM malfunction Power off, then restart the Power off, then restart the...
  • Page 50 7.4.2.2 E2(Communication malfunction between indoor and outdoor units) diagnosis and solution. Error Code Malfunction Indoor unit does not receive the feedback from outdoor unit during 120 seconds or outdoor unit does not receive the conditions feedback from any one indoor unit during 180 seconds. ●...
  • Page 52 Pic 1: Use a multimeter to test the DC voltage 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 53 Pic 2: IPM board (for 2 zone/ 3-zone) Operating Standby...
  • Page 54 Pic 2: IPM (for5 zone) Operating Standby Power PIC3: Main board LED when power on and unit standby.
  • Page 55 PIC 4: Check point button, press 1 time for check how many indoor units are connected.
  • Page 56 7.4.2.3 E3 (Communication malfunction between IPM board and outdoor main control board) diagnosis Error Code Malfunction PCB main chip does not receive feedback from IPM module during 60 seconds. conditions ● Wiring mistake Potential causes ● Faulty PCB Trouble shooting:...
  • Page 57 Remark: Use a multimeter 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 58 7.4.2.4 E4 (Outdoor temperature sensor (coil sensor T3,ambient sensor T4, Compressor discharge sensor T5、indoor coil outlet pipe sensor T2B) malfunction) diagnosis and solution F1/F2/F3/F4/F5 (No.A,B,C,D,E Indoor unit coil outlet temp. sensor malfunction) diagnosis and solution. Error Code E4/F1/F2/F3/F4/F5 Malfunction If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED will display the failure.
  • Page 59 7.4.2.5 E5 (Over-voltage or under-voltage protection) diagnosis and solution. Error Code Malfunction conditions An abnormal voltage rise or drop is detected by checking the specified voltage detection circuit. ● Power supply problems. Potential causes ● System leakage or block ● Faulty PCB Trouble shooting:...
  • Page 60 IPM board (for 2-zone /3-zone)
  • Page 61 Bridge rectifier (for 2-zone/3-zone) Remark: Measure the DC voltage between + and - port. The normal value should be 190V~250V. P(or E1/E2/E3)-N(GND) (for 2-zone/3-zone) Bridge rectifier (for 2-zone/3-zone) IPM Module (for 2-zone/3-zone)
  • Page 62 IPM board (for 4-zone)
  • Page 63 Bridge rectifier (for 5-zone) Remark: Measure the DC voltage between + and - port. The normal value should be 190V~250V. IPM board (for 5-zone) IPM Module (for 5-zone)
  • Page 64 7.4.2.6 E6 (PFC module protection) error diagnosis and solution. Error Code Malfunction When the voltage signal that PFC sends to main control board is abnormal, the display LED will show “E6” and AC will turn conditions off. Potential causes ● Wiring mistake ●...
  • Page 65 Inductance Two ports of the inductance...
  • Page 66 7.4.2.7 E8 (Outdoor fan speed malfunction) diagnosis and solution Error Code Malfunction conditions When outdoor fan speed keeps too low (300RPM) or too high(2400RPM) for certain time, the unit will stop and the LED will display the failure. ● Wiring mistake Potential causes ●...
  • Page 67 Index 1:  1. 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.
  • Page 69 7.4.2.8 P1 (High pressure protection) diagnosis and solution. Error Code Malfunction conditions If the sampling voltage is not 5V, the LED will display the failure. ● Wiring mistake Potential causes ● Faulty over load protector ● System block ● Faulty outdoor PCB Trouble shooting:...
  • Page 72 7.4.2.9 P2 (Low pressure protection) diagnosis and solution. Error Code Malfunction conditions If the sampling voltage is not 5V, the LED will display the failure. ● Wiring mistake Potential causes ● Faulty over load protector ● System block ● Faulty outdoor PCB Trouble shooting:...
  • Page 75 7.4.2.10 P3 (Current overload protection) diagnosis and solution. Error Code Malfunction conditions If the outdoor current exceeds the current limit value, the LED will display the failure. ● Wiring mistake Potential causes ● Faulty over load protector ● System block ●...
  • Page 78 7.4.2.11 P4 (Temperature protection of compressor discharge) diagnosis and solution. Error Code Malfunction conditions When the compressor discharge temperature(T5) is more than 115℃ for 10 seconds, the compressor will stop restart till T5 is less than 90℃. Potential causes ● Refrigerant leakage ●...
  • Page 79 7.4.2.12 P5 (High temperature protection of condenser) diagnosis and solution. Error Code Malfunction conditions When outdoor pipe temperature is more than 65°C, the unit will stop, and unit runs again when outdoor pipe temperature is less than 52°C ● Faulty condenser temperature sensor Potential causes ●...
  • Page 80 7.4.2.13 P6 (Inverter module (IPM) malfunction) diagnosis and solution. Error Code Malfunction 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. ● Wiring mistake Potential causes ●...
  • Page 81 IPM module protection Check whether the voltage range Check whether the input Regulate it to correct, then of P-N on IPM module is normal? power supply is correct? check whether the system DC277-356V for 18-27KBtu/h; 208-230V, 1N, 60Hz can work normally? DC277-410V for 36-48KBtu/h Check whether the connecting line between main board and...
  • Page 82 7.4. 2.14 . High temperature protection of compressor top(IDU P2/ODU P0) Malfunction decision If the sampling voltage is not 5V, the LED will display the failure. conditions Supposed causes Faulty overload protector ● Wiring mistake ● System leakage or block ●...
  • Page 83 7.4. 2.15 The cooling operation or heating operation does not operate. Potential causes ● Faulty 4-way valve Check of 4-way, please refer to part 5 in 9.5 Trouble Criterion Of Main Parts. 7.4.2.16 When cooling, heat exchanger of non-operating indoor unit frosts. When heating, non-operating indoor unit get warm.

  • Page 84: Trouble Criterion Of Main Parts

    7.5 Trouble Criterion of Main Parts. 1.Temperature sensor checking Disconnect the temperature 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 85 Appendix 1 Temperature Sensor Resistance Value Table (℃--K) ℃ K Ohm ℃ K Ohm ℃ K Ohm ℃ K Ohm 115.266 12.6431 2.35774 0.62973 108.146 12.0561 2.27249 0.61148 101.517 11.5000 2.19073 0.59386 96.3423 10.9731 2.11241 0.57683 89.5865 10.4736 2.03732 0.56038 84.2190 10.000 1.96532...
  • Page 86 Appendix 2 Unit: ℃---K Discharge temp. sensor table 542.7 68.66 13.59 3.702 511.9 65.62 13.11 3.595 62.73 12.65 3.492 455.9 59.98 12.21 3.392 430.5 57.37 11.79 3.296 406.7 54.89 11.38 3.203 384.3 52.53 10.99 3.113 363.3 50.28 10.61 3.025 343.6 48.14 10.25 2.941...
  • Page 87 Appendix 3: ℃ 10 11 12 13 14 15 16 17 18 19 20 21 22 ℉ 48 50 52 54 56 58 60 62 64 66 68 70 72 ℃ 23 24 25 26 27 28 29 30 31 32 33 34 35 ℉...
  • Page 88 3. IPM continuity check Turn off the power, let the large capacity electrolytic capacitors discharge completely, and dismount the IPM. Use a digital tester to measure the resistance between P and UVWN; UVW and N. Normal Normal resistance Digital tester Digital tester resistance value...
  • Page 89 Position Resistance Value YDK53- YDK70-6FB YDK180-8GB YSK27-4G YSK68-4B YDK45-6B YSK25-6L 6FB(B) 56Ω±8% 24.5Ω±8% 317Ω±8% 145Ω±8% 345Ω±8% 627Ω±8% 88.5Ω±8% Black - (20℃) (20℃) (20℃) (20℃) (20℃) (20℃) (20℃) 76Ω±8% 19Ω±8% 252Ω±8% 88Ω±8% 150Ω±8% 374.3Ω±8% 138Ω±8% Red - Yellow (20℃) (20℃) (20℃) (20℃) (20℃) (20℃)
  • Page 90 6.EXV check Disconnect the connectors.
  • Page 91 Resistance to EXV coil Color of lead wire Normal Value Red- Blue Red - Yellow About 50Ω Brown-Orange Brown-White...
  • Page 92 Red- Blue Red - Yellow...
  • Page 93 Brown-Orange...
  • Page 94 Brown-White...

  • Page 95: Disassembly Instructions

    Disassembly Instructions Note: This part is for reference, the photos may have slight difference with your machine.  YU2E18YJ6AMHO-Y (WCA30 metal plate) Part name Procedures Remarks How to remove the fan assembly assembly. 1) Turn off the air conditioner ②...
  • Page 96 cover. (3 screws) 6) Remove the cover of electrical control box. ⑦ 7) Disconnect the fan motor connector CN14(3p,white) from the IPM board. ⑧ 8) Remove the fan motor after unfastening four fixing screws. Panel plate How to remove the panel plate.
  • Page 97 Screws of front panel 2) Remove the screws of big handle, and remove the big handle.(4 screws) 3) Remove two screws of Screws terminal board and seven of big handle screws of right-rear panel, and remove the right-rear panel. Screws of terminal board Screws of right- rear panel...
  • Page 98 Electrical How to remove the electrical parts parts. 1) Perform work of item 1,2. 2) Remove the four screws fixing the IPM board. PCB board IPM board Unfasten the connector ④ of the reactor. Unfasten the connector of the compressor. ③...
  • Page 99 CN17:T3/T4 temperature sensor CN15 CN17 CN18/CN19 CN25/CN23 (2p/2p,white) CN7: Discharge temperature sensor (2p,white) CN15:T2B-A,B temperature sensor (2p/2p,white) CN18/CN19: Electronic expansion valve A,B (6p/6p,red/red) CN25/CN23: S-A,S-B (3p/3p,white/white) Wires: CN5/CN6 CN1/CN2 CN1/CN2: 4-way valve (blue-blue) CN5/CN6: Crankcase heating cable (red-red) CN3:L-IN (red) ⑧...
  • Page 100 Compressor How to remove the compressor. 1) Perform work of item 1,2. 2) Remove the cover of electrical control box. 3) Extract refrigerant gas. 4) Remove the sound insulation material and crankcase heating cable. 5) Remove terminal cover of compressor, and disconnect wires of ⑥...
  • Page 101 Reactor How to remove the reactor 1) Perform work of item 2 2) Unfasten the connector between IPM and reactor. ② 3) Remove three screws of reactor, and remove the reactor. Screws of cover of inductance The 4-way How to remove the 4-way valve valve 1) Perform work of item 2.

  • Page 102: Yu3E27Yj6Amho-Y (Wd30 Metal Plate)

    How to remove the expansion expansion valve valve 1) Perform work of item 1,2. 2) Remove the electrical parts Expansion valves from item 3.. 3) Remove the coils. 4) Detach the welded parts of Coils expansion valves and pipes.  YU3E27YJ6AMHO-Y (WD30 metal plate) Part name Procedures...
  • Page 103 panel, and remove the front panel. (8 screws) Screws of front panel Screws of right front side panel Screws of front panel 6) Remove two screws of terminal board, screws of water collector and fifteen screws of right-rear panel, and remove the right-rear panel.
  • Page 104 Screws of right-rear panel Screws of terminal board...
  • Page 105 How to remove the fan assembly. assembly 1) Remove the top cover, right front side panel and ② front panel from item 1.step 2) Remove the hex nut fixing the fan. ④ 3) Remove the fan. 4) Remove the cover of electrical control box cover.
  • Page 106 How to remove the electrical ③ parts. Electrical parts 1) Perform work of item 1,2. 2) Remove the four screws fixing the IPM board. Unfasten the connector of the reactor. IPM board PCB board Unfasten the connector of the compressor. Disconnect following 3 ④...
  • Page 107 Disconnect the CN17 CN15 CN7 CN18/CN19/CN22 connectors and wires connected from PCB and other parts. Connectors: CN17:T3/T4 temperature sensor (2p/2p,white) CN20 CN7: Discharge temperature sensor CN23 (2p,white) CN25 CN12:Ttop temperature sensor(2p,white) CN15:T2B-A,B,C temperature sensor (2p/2p/2p,white) CN18/CN19/CN22: Electronic expansion valve A,B,C (6p/6p/6p,red/red/red) CN1/CN2 CN5/CN6...
  • Page 108 How to remove the compressor. Compressor 1) Perform work of item 1,2,3. 2) Remove the electrical control box and partition plate. ⑥ 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...
  • Page 109 Reactor How to remove the reactor 1) Perform work of item 1,2 2) Unfasten the connector between IPM and reactor. 3) Remove two screws of cover of inductance, and remove the cover of Screws of cover of inductance inductance 4) Disconnect two pieces of wires connected from the cover of inductance.
  • Page 110 How to remove the expansion expansion valve valve 1) Perform work of item 1,2. 2) Remove the electrical parts Expansion valves from item 3. 3) Remove the coils. 4) Detach the welded parts of expansion valves and pipes.  YU4E36YJ6AMHO-Y (WD30 metal plate) Part name Procedures Remarks...
  • Page 111 panel, and remove the front panel. (8 screws) Screws of front panel Screws of right front side panel Screws of front panel 6) Remove two screws of terminal board, screws of water collector and fifteen screws of right-rear panel, and remove the right-rear panel.
  • Page 112 Screws of right-rear panel Screws of terminal board How to remove the fan assembly. assembly 1) Remove the top cover, ② right front side panel and front panel from item 1.step 2) Remove the hex nut fixing the fan.
  • Page 113 3) Remove the fan. ④ 4) Unfix the hooks and remove the screws, then open the electronic control box. 5) Disconnect the fan motor ⑤ connector CN19(3p,white) from the driver board. Remove the fan motor after unfastening four fixing ⑥ screws.
  • Page 114 pieces of connection wires and connectors between driver ④ board and PCB. CN55-CN7(7p,white) CN54-CN6(red) CN53-CN5(black) 6) Remove the fixing screws, then move the driver board. Disconnect the CN53 connectors and wires CN54 connected from PCB and other parts. Connectors: CN8:T3/T4 temperature sensor (2p/2p,white) CN55 CN33: Discharge temperature sensor...
  • Page 115 CN10/CN44: Crankcase heating cable (black-red) CN13 CN1:L1-IN (red) CN33 CN10 CN2:L2-IN (black) CN22 CN40 CN2 CN1 CN44 Disconnect the grounding wire (yellow-green) after removing the right-rear panel. 9) Remove the PCB board. ⑧ How to remove the compressor. Compressor 1) Perform work of item 1,2,3. 2) Remove the electrical control box and partition plate.
  • Page 116 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. The 4-way How to remove the 4-way valve valve Coil 1) Perform work of item 1,2. 2) Extract refrigerant gas.
  • Page 117  YU5E48YJ6AMHO-Y (WE30 metal plate) Part name Procedures Remarks How to remove the fan assembly assembly. Turn off the air ② conditioner. Turn off the power breaker. 2) Remove the screws of air outlet grille(8 screws) 3) Remove the hex nut fixing the fan.
  • Page 118 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. ⑥ 8) Remove the fan motor after unfastening fixing screws. ⑦...
  • Page 119 How to remove the panel Panel plate plate. 4) Remove big handle.(2 Screws screws) and water of big handle collector(2 screws) 5) Remove 2 screws of Screws of Water collector terminal board and 15 screws of right-rear panel, and remove the right-rear Screws of panel.
  • Page 120 DC Fan Driver board 2) Disconnect the fan motor Connector(5p,white) from the IPM board. Disconnect 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. Disconnect the connectors and wires connected from PCB and other...
  • Page 121 (2p,white) CN12：Heatsink temperature sensor(2p,red) CN9:T3/T4 temperature sensor (2p/2p,white) CN13 CN16 CN11:T2B-A,B,C,D,E temperature CN21 sensor (2p/2p/2p/2p/2p,white) CN29 CN37 CN15/CN23/CN26/CN30/CN33: CN8 CN12 Electronic expansion valve CN9 CN11 (6p/6p/6p/6p/6p,red) CN37/CN29/CN21/CN16/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: CN10 CN17/CN18: 4-way valve (blue-blue) CN30/CN23 CN19/CN20: connected to crankcase...
  • Page 122 Compressor How to remove the compressor. 1) Perform work of item 1 step 5~6 and item 2.. ⑤ 2) Extract refrigerant gas. 3) Remove the 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.
  • Page 123 The 4-way How to remove the 4-way valve valve 6) Perform work of item 1 step 5~6 and item 2.. Coil 7) Extract refrigerant gas. Welded parts 8) Remove the electrical parts from item 3. 9) Remove fixing screw of the coil, and remove the coil.
  • Page 124 2019 Johnson Controls, Inc. www.johnsoncontrols.com Form: MYHFEC7AMTOR3-190325 Johnson Controls reserve the right to change product features without prior notice.

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