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Pioneer YN018GMFI16M2D, Service Manual

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Pioneer YN018GMFI16M2D Service Manual Download Page 7

4.   Refrigerant Cycle Diagram 

5.1Refrigeration circuit drawing of inverter dual zone (2 zones) 

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

OUTDOOR

EXV A CAPILIARY A

CHECK VALVE

CAPILIARY TUBE

EXV B CAPILIARY B

LIQUID VALVE  B

GAS VALVE B

Accumulator

T2B-A  

Evaporator

temp. sensor outlet

T2B-B

 

5.2  Refrigeration circuit drawing of inverter triple zone (3 zones) 

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

OUTDOOR

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

Accumulator

T2B-A  

Evaporator

temp. sensor outlet

T2B-B

T2B-C

 

5.3 Refrigeration circuit drawing of inverter quad zone (4 zones) 

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

OUTDOOR

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

Accumulator

High pressure
switch

Low pressure
switch

T2B-A  

Evaporator

temp. sensor outlet

T2B-B

T2B-C

T2B-D

Summary of Contents for YN018GMFI16M2D

Page 1: ... 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 Table of Contents 1 Product Specifications 2 Indoor Unit Combination 3 Suggested Indoor Unit Model Numbers 4 Dimension Of Outdoor Unit 5 Refrigerant Cycle Diagram 6 Installation Details ...

Page 2: ... the indoor unit need to be repaired 11 6 7 Re installation while the outdoor unit need to be repaired 12 7 Electronic Function 13 7 1 Abbreviation 13 7 2 Electric control working environment 13 7 3 Main Protection 13 7 4 Control and Functions 15 8 Wiring Diagrams 19 9 Troubleshooting 31 9 1Safety 31 9 2 Indoor Unit Error Display 32 9 3 Outdoor Unit Display 34 9 4 Diagnosis and Solution 38 9 5 Tro...

Page 3: ...nsion W D H inch 33 27x12 6x27 56 33 27x12 6x27 56 35 43x12 40x33 86 38 98x13 58x37 99 Packing W D H mm 965x395x755 965x395x755 1043x395x915 1120x435x1100 Packing W D H inch 37 99x15 55x29 72 37 99x15 55x29 72 41 06x15 55x36 02 44 09x17 13x43 31 Net Gross weight Kg 53 5 57 54 57 5 62 67 77 81 Net Gross weight Pound 117 95 125 66 119 05 126 77 136 69 147 71 169 76 178 57 Refrigerant type oz R410A 5...

Page 4: ...Limit TRIPLE ZONE 30K Nominal 8 0kW 9 There should be only one Floor Ceiling or Duct unit 12 18 9 9 9 12 9 18 12 12 12 18 18 18 9 9 9 9 9 12 9 9 18 9 12 12 9 12 18 12 12 12 Multi DC Outdoor Unit Nominal capacity Suggested Combination Limit QUAD ZONE 36K Nominal 10 5kW 9 None 12 18 9 9 9 12 9 18 12 12 12 18 18 18 9 9 9 9 9 12 9 9 18 9 12 12 9 12 18 9 18 18 12 12 12 12 12 18 12 18 18 9 9 9 9 9 9 9 1...

Page 5: ...MFI16MLD FB012CMFI16MLD 18K WB018GMFI16MLD CB018GLFI16MLD RB018GMFI16MLD UB018GMFI16MLD SUGGESTED INDOOR UNIT YN030GMFI 16M3D 9K WB009GMFI16MLD 12K WB012GMFI16MLD CB012GLFI16MLD RB012GMFI16MLD UB012GMFI16MLD FB012CMFI16MLD 18K WB018GMFI16MLD CB018GLFI16MLD RB018GMFI16MLD UB018GMFI16MLD SUGGESTED INDOOR UNIT YN036GMFI 16M4D 9K WB009GMFI16MLD 12K WB012GMFI16MLD CB012GLFI16MLD RB012GMFI16MLD UB012GMF...

Page 6: ...mension mm In W D H W1 A B YN018GMFI16M2D 845 33 3 320 12 6 700 27 6 908 35 7 560 22 335 13 2 YN027GMFI16M3D YN030GMFI16M3D 900 35 4 315 12 4 860 33 9 980 38 6 590 23 2 333 13 1 YN036GMFI16M4D 990 39 345 13 6 965 38 1075 42 3 624 24 6 366 14 4 ...

Page 7: ...1 Room temp sensor T3 Condenser temp sensor T5 Discharge temp sensor T4 Ambient temp sensor INDOOR OUTDOOR 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 Accumulator T2B A Evaporator temp sensor outlet T2B B T2B C 5 3 Refrigeration circuit drawing of inverter quad zone 4 zones LIQUID VALVE A GAS VALVE A HEAT EX...

Page 8: ...oot 0 16 Ozs per Additional Foot Caution Refrigerant pipe diameter differs according to indoor unit connected When extending the pipes refer to the tables below When refrigerant pipe diameter is different from that of outdoor unit union for 12K and 18K indoor units additional brass adapter union supplied needs to be used on outdoor unit union to change the size Indoor unit Extension pipe diameter ...

Page 9: ...uge is a little higher than the atmospheric pressure Then remove the charging hose from the service port of the 3 way valve 8 Fully open the valve cores of both 2 way valve and 3 way valves and then securely tighten the brass valve cover caps 2 Air purging by refrigerant Procedure 1 Confirm that both the 2 way and 3 way service valves are set to the closed position 2 Connect the charging set and a...

Page 10: ... Be sure to check the gas leakages 6 5 Adding the refrigerant after running the system for many years Recommended only if the refrigerant being added does not exceed 10 of the total refrigerant amount Otherwise remove the remaining refrigerant entirely and recharge fully Procedure 1 Connect the charging hose to the 3 way service port open the 2 way valve and the 3 way valve Connect the charge hose...

Page 11: ...que of 18N m Be sure to check for gas leakage 2 Air purging by the refrigerant Procedure 1 Confirm that both the 2 way and 3 way valve cores are set to fully closed position 2 Connect the charging set and a charging cylinder to the service port of the 3 way valve Leave the valve on the charging cylinder closed 3 Air purging Open the valve on the charging cylinder and valve of the charging set Purg...

Page 12: ...own to ensure liquid charge 2 Purge the air from the charging 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 3 Put the charging cylinder onto an electronic scale and record the weight 4 Open the valve Low side on the charge set and charge the system with liquid refrigerant If the system cannot be c...

Page 13: ...ction has protection functions against current voltage and temperature If these protections are triggered the corresponding code will display on indoor unit LED and A C will stop The unit will recover 3min after the protection conditions disappear 7 3 5 Low voltage protection VOLT_RST1_ADD VOLTAGE No limit VOLT_LTM1_ADD VOLT_RST2_ADD VOLT_LTM2_ADD VOLT_LTM_FREQ1_ADD VOLT_LTM_FREQ2_ADD Note if the ...

Page 14: ...minutes 7 3 9 Outdoor unit anti freezing protection When T2B 0 for 250 seconds the indoor unit capacity demand will be set as zero and reset to normal when T2B 10 7 3 10 Oil return Running rules 1 If the compressor frequency stays lower than RET_OIL_FREQ1_ADD for RET_OIL_TIME1_ADD the system will rise the running frequency to RET_OIL_FREQ2_ADD for RET_OIL_TIME2_ADD and then resume back to former f...

Page 15: ...door units Cooling Outdoor temperature T4 25 17 25 17 Modify rate 100 80 40 Note The final result is integer In low ambient cooling mode modify rate is fixed at 40 According to the final capacity request to confirm the operating frequency as per the following table Frequency Hz 0 COO L_F1 COO L_F2 COOL _F15 COO L_F1 6 Amendatory capacity demand 0 1 2 15 16 Meanwhile the maximum running frequency w...

Page 16: ..._ADD and T4 4 there s frequency elevation elevated frequency Recent frequency 110 When T2 T2_ExitT4LowFre_ADD 2 and T4 6 the highest frequency can t exceed F17 When T2 T2_ExitT4LowFre_ADD 4 and T4 8 the highest frequency can t exceed F18 When T2 T2_ExitT4LowFre_ADD 6 and T4 10 the highest frequency can t exceed F19 For all other conditions the highest frequency is F20 7 4 2 Defrost control Conditi...

Page 17: ...speed control logic low ambient cooling When T4 15 and T3 30 the unit will enter into low ambient cooling mode The outdoor fan will choose its speed according to T3 When T3 38 or when T4 20 the outdoor fan will choose its speed according to T4 again 38 Exit low ambient cooling mode run with high fan for 1 minute Low 30 27 23 off 7 4 3 2 Heating mode For YN027GMFI16M3D For YN018GMFI16M2D YN030GMFI1...

Page 18: ...ns If the T2B average the relevant valve needs 16p more close This modification will be carried out every 2 minutes 7 4 4 2 Heating mode The initial open angle of EXV is 250P adjustment range is 100 350p When the unit starts to work for 3minutes the outdoor will receive indoor units of capacity demand T2 information and calculate the average of them After comparing each indoor s T2 with the averag...

Page 19: ...7 Wiring Diagrams 8 1 Wiring diagram of DUAL Circuit outdoor unit YN018GMFI16M2D ...

Page 20: ...PCB board of YN018GMFI16M2D ...

Page 21: ...IPM board of YN018GMFI16M2D ...

Page 22: ...8 2 Wiring diagram of Triple Circuit outdoor unit YN027GMFI16M3D YN030GMF16M3D ...

Page 23: ...PCB board of YN030GMFI16M3D ...

Page 24: ...IPM board of YN030GMFI16M3D ...

Page 25: ...PCB board of YN027GMFI16M3D ...

Page 26: ...IPM board of YN027GMFI16M3D ...

Page 27: ...8 3 Wiring diagram of Quadruple 4 zone outdoor unit YN036GMFI16M4D ...

Page 28: ...PCB board of YN036GMFI16M4D ...

Page 29: ...IPM board of YN036GMFI16M4D ...

Page 30: ...PFC board of YN036GMFI16M4D ...

Page 31: ...se capacitors Do not forget to discharge the electrical power remaining in the capacitors before servicing The value of resistance used for discharging the power should be about 1500 ohms to 2000 ohms 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 32: ...mpressor top P0 P3 Outdoor temperature is lower than 15 C optional function P4 Inverter compressor drive protection P5 Mode conflict FB Series Floor Console Indoor Units Operation Timer De frost Failure X X Open or short circuit of T1 temperature sensor X X Open or short circuit of T2 temperature sensor X X Communication malfunction between indoor and outdoor units X Indoor EEPROM malfunction X Ou...

Page 33: ...ull water malfunction E3 X X Indoor EEPROM malfunction E4 X X IPM module protection E5 P6 X X Open or short circuit of T3 or T4 temperature sensor or outdoor EEPROM malfunction E6 E0 E4 X Outdoor fan has been out of control E7 E8 X Indoor fan speed has been out of control F5 X Voltage protection P0 E5 X X Temperature protection of compressor top P1 P0 X Outdoor unit over current protection P2 P3 X...

Page 34: ...lay Display running frequency running state or malfunction code 1 No of indoor units in good connection Actual data Display Number of indoor unit 1 1 2 2 3 3 4 4 2 Outdoor unit running mode code Off 0 Fan only 1 Cooling 2 Heating 3 Forced cooling 4 3 A indoor unit capacity The capacity unit is horse power If the indoor unit is not connected the digital display digits will show 9K 1HP 12K 1 2HP 18K...

Page 35: ...splay digits will show 70 If the indoor unit is not connected the digital display digits will show 28 B indoor unit evaporator temp T2B 29 C indoor unit evaporator temp T2C 30 D indoor unit evaporator temp T2D 31 E indoor unit evaporator temp T2E 32 Condenser pipe temp T3 33 Outdoor ambient temp T4 34 Compressor discharge temp Tp The display value is between 30 129 degrees If the temp is lower tha...

Page 36: ...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 running frequency and RO each displays 0 5s In low ambient cooling mode the LED displays LC or alternative displays between running frequency and LC each displa...

Page 37: ...otor models F1 No A Indoor unit coil outlet temp sensor or connector of sensor is defective F2 No B Indoor unit coil outlet temp sensor or connector of sensor is defective F3 No C Indoor unit coil outlet temp sensor or connector of sensor is defective F4 No D Indoor unit coil outlet temp sensor or connector of sensor is defective P0 Temperature protection of compressor top Only for M3OD 27HRDN1 M ...

Page 38: ...e shooting Supposed causes EEPROM a read only memory whose contents can be erased and reprogrammed using a pulsed voltage For the location of EEPROM chip please refer to the below photos 9 4 1 2 Communication malfunction between indoor and outdoor units diagnosis and solution Malfunction decision conditions Indoor unit does not receive the feedback from outdoor unit during 120 seconds Supposed cau...

Page 39: ...r 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 Ind...

Page 40: ...f outdoor unit The red pin of multimeter connects with 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 Pic 2 IPM for dual triple quad zone Self Check OK Power some modles Operating ...

Page 41: ...s or the zero crossing signal time interval is abnormal Supposed causes Connection mistake PCB faulty Trouble shooting PIC 4 Check point button press 1 time for check how many indoor units are connected YN027GMFI16M3D Check point button press 18 times for check how many indoor units are connected for Others PIC3 Main board LED when power on and unit standby ...

Page 42: ...s and solution Malfunction decision conditions When indoor fan speed stays too low 300RPM for certain time the unit will stop and the LED will display the failure Supposed causes Wiring mistake Fan assembly faulty Fan motor faulty PCB faulty Trouble shooting ...

Page 43: ...ion Of Main Parts 2 Indoor DC fan motor control chip is inside fan motor Measure the resistance value of each winding by using the tester If any resistance value is zero the fan motor must have problems and need to be replaced For console 5 4 6 3 2 1 For other models NO Color 1 Red 2 3 White 4 Blue 5 Yellow 6 Black NO Color 1 Red 2 3 Black 4 White 5 Yellow 6 Blue ...

Page 44: ... 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 to be replaced For other models For conso...

Page 45: ... 15V For console NO Color Signal Voltage 1 Red VDC 310V 2 3 White Vcc 15V 4 Blue FG 15V 5 Yellow Vsp 0 7 5V 6 Black GND 0V 9 4 1 5 open or short circuit of temperature sensor diagnosis and solution Malfunction decision conditions If the sampling voltage is lower than 0 06V or higher than 4 94V the LED will display the failure Supposed causes Wiring mistake Sensor faulty PCB faulty Trouble shooting...

Page 46: ......

Page 47: ...e the IPM module check whether the system can work normally No No Replace the 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 mu...

Page 48: ...9 4 1 7 Over voltage or too low voltage protection diagnosis and solution ...

Page 49: ...ressor operates Whether refrigerant circulation volume is normal Whether abnormality is the same after gas charging Yes No No Reconnect and retest No Check refrigerant system such as clogging of capillary etc No Whether the connection is good Replace the outdoor main PCB Yes Replace the protector No Yes Charge refrigerant Whether protector is normal If protector is normal resistance 0 9 4 1 9 Inve...

Page 50: ...iagnosis and solution For cassette A5 duct Malfunction decision conditions If the sampling voltage is not 5V the LED will display the failure Supposed causes Wiring mistake Water level switch faulty Water pump faulty Indoor PCB faulty ...

Page 51: ... 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 No No No mode con...

Page 52: ... decision conditions PCB main chip does not receive feedback from EEPROM chip Supposed causes Installation mistake PCB faulty Trouble shooting EEPROM a read only memory whose contents can be erased and reprogrammed using a pulsed voltage For the location of EEPROM chip please refer to the below photos Outdoor PCB M3OC 30HRFN1 M ...

Page 53: ...tion Error Code E2 Malfunction decision 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 Supposed causes Wiring mistake Indoor or outdoor PCB faulty Trouble shooting ...

Page 54: ...t and S port of outdoor unit The red pin of multimeter connects with 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 Pic 2 IPM For dual tri zone Self Check Operating ...

Page 55: ...PIC 4 Check point button press 1 time for check how many indoor units are connected Self Check Power Operating PIC3 Main board LED when power on and unit standby Pic 2 IPM For quad zone ...

Page 56: ...between IPM board and outdoor main board error diagnosis and Error Code E3 Malfunction decision conditions PCB main chip does not receive feedback from IPM module during 60 seconds Supposed causes Wiring mistake PCB faulty Trouble shooting ...

Page 57: ... 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: ...nditions If the sampling voltage is lower than 0 06V or higher than 4 94V the LED will display the failure Supposed causes Wiring mistake Sensor faulty PCB faulty 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 ...

Page 59: ... and solution Error Code E5 Malfunction decision conditions An abnormal voltage rise or drop is detected by checking the specified voltage detection circuit Supposed causes Power supply problems System leakage or block PCB faulty Trouble shooting ...

Page 60: ...IPM for dual tri zone IPM for quad zone P N for dual tri zone ...

Page 61: ...P N for quad zone ...

Page 62: ...bridge rectifier for dual tri zone bridge rectifier for quad zone ...

Page 63: ...Remark Measure the DC voltage between and port The normal value should be 190V 250V ...

Page 64: ... module malfunction Trouble shooting PFC module protection Check whether the connecting line between main board and the PFC module is connected tightly Yes Check whether the voltage range 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 t...

Page 65: ...Two ports of the inductance Inductance ...

Page 66: ......

Page 67: ... motor models Error Code E8 Malfunction decision 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 Supposed causes Wiring mistake Fan assembly faulty Fan motor faulty PCB faulty Trouble shooting ...

Page 68: ...t have problems and need to be replaced NO Color 1 Red 2 3 Black 4 White 5 Yellow 6 Blue Index2 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: ...voltage input and output NO Color Signal Voltage 1 Red Vs Vm 140 380V M2OC 18HFN1 M M4OC 36HRFN1 M 192 380V M3OC 30HRFN1 M 2 3 Black GND 0V 4 White Vcc 13 5 16 5V 5 Yellow Vsp 0 6 5V 6 Blue FG 15V Vs Vcc Vsp FG ...

Page 70: ... block Outdoor PCB faulty Trouble shooting Temperature protection of compressor top Whether compressor operates Whether refrigerant circulation volume is normal Whether abnormality is the same after gas charging Yes No No Reconnect and retest No Check refrigerant system such as clogging of capillary etc No Whether the connection is good Replace the outdoor main PCB Yes Replace the protector No Yes...

Page 71: ......

Page 72: ...nd solution Only for YN036GMFI16M4D Error Code P1 Malfunction decision conditions If the sampling voltage is not 5V the LED will display the failure Supposed causes Wiring mistake Over load protector faulty System block Outdoor PCB faulty Trouble shooting ...

Page 73: ......

Page 74: ...nd solution Only for YN036GMFI16M4D Error Code P2 Malfunction decision conditions If the sampling voltage is not 5V the LED will display the failure Supposed causes Wiring mistake Over load protector faulty System block Outdoor PCB faulty Trouble shooting ...

Page 75: ......

Page 76: ...solution Error Code P3 Malfunction decision conditions If the compressor current exceeds the current limit value for 10 seconds the LED will display the failure Supposed causes Wiring mistake Over load protector faulty System block Outdoor PCB faulty Trouble shooting ...

Page 77: ......

Page 78: ... P4 Malfunction decision conditions When the compressor discharge temperature Tp is more than 115 for 10 seconds the compressor will stop and restart till Tp is less than 90 Supposed causes Refrigerant leakage Wiring mistake The discharge temperature sensor faulty Outdoor PCB faulty Trouble shooting ...

Page 79: ...ror Code P5 Malfunction decision 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 Supposed causes The condenser temperature sensor faulty Heat exchanger dirty System block Trouble shooting ...

Page 80: ...ightly Replace the IPM module check whether the system can work normally No No Replace the 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 norm...

Page 81: ...please refer to part 5 in 9 5 Trouble Criterion Of Main Parts 9 4 2 16 When cooling heat exchanger of non operating indoor unit frosts When heating non operating indoor unit get warm Supposed causes EXV faulty Wire and tubing connected in reverse Check of EXV please refer to part 6 in 9 5 Trouble Criterion Of Main Parts ...

Page 82: ...e 18k Cassette Indoor fan motor WZDK37 38G WZDK37 38G Model 12k Floor Ceiling 18k Floor Ceiling Indoor fan motor WZDK55 38GS W WZDK55 38GS W Model 12k Floor Console Indoor fan motor RD 280 20 8A Outdoor unit Model YN018GMFI16M2D YN027GMFI16M3D YN030GMFI16M3D YN036GMFI16M4D Compressor DA130S1C 20FZ DA150S1C 20FZ DA250S2C 30MT TNB306FPGMC L Outdoor fan motor WZDK50 38G YDK53 6FB B WZDK72 38G WZDK180...

Page 83: ... 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 Tp sensor Measure the resistance value of each winding by using the multi meter ...

Page 84: ... 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 31...

Page 85: ... 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 5 663 126...

Page 86: ... 23 24 25 26 27 28 29 30 31 32 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 DA130S1C 20FZ DA150S1C 20FZ DA250S2C 30MT TNB306FPGMC L Blue Red 0 95Ω 20 0 95Ω 20 0 55Ω 20 0 53Ω 20 ...

Page 87: ...stance 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 Bran...

Page 88: ...Ω 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 replaced 2 Turn off the power use a digital tester to mea...

Page 89: ...6 EXV check Disconnect the connectors ...

Page 90: ...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 91: ...Red Blue Red Yellow ...

Page 92: ...Brown Orange Brown White ...

Page 93: ...ght front side panel and remove the right front side panel 2 screws 4 Remove the screws of front panel and remove the front panel 9 screws 5 Remove the screws of big handle and remove the big handle 4 screws 6 Remove two screws of terminal board two screws of water collector and twelve screws of right rear panel and remove the right rear panel Screws of top cover Screws of front panel Screws of ri...

Page 94: ...s y 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 3 Remove the fan Screws of big handle Screws of right rear panel Screws of terminal board Screws of water collector ...

Page 95: ...fastening four fixing screws 3 Electrical parts How to remove the electrical parts 1 Perform work of item 1 2 2 Remove the ten screws fixing the IPM board 3 Unfasten the connector of the reactor 4 Unfasten the connector of the compressor 5 Disconnect following 5 pieces of connection wires and connectors between IPM and PCB IPM board PCB board ...

Page 96: ...other parts Connectors CN17 T3 T4 temp sensor 2p 2p white CN7 Tdischarge temp sensor 2p white CN15 T2B A B temp sensor 2p 2p white CN18 CN19 Electronic expansive 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 CN17 CN7 CN15 CN18 CN19 CN25 CN23 CN1 CN2 CN5 CN6 CN3 CN4 ...

Page 97: ...em 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 6 Remove the discharge pipe and suction pipe with a burner 7 Remove the hex nuts and washers fixing the compressor to bottom plat...

Page 98: ... of wires connected from the cover of inductance 5 Remove two screws of reactor and remove the reactor 6 The 4 way valve How to remove the 4 way valve 1 Perform work 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 Screws of cover of inductance Screws of reactor Co...

Page 99: ...nsion 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 Coils Expansion valves ...

Page 100: ...e panel and remove the right front side panel 2 screws 4 Remove the screws of front panel and remove the front panel 9 screws 5 Remove the screws of big handle and remove the big handle 4 screws 6 Remove two screws of terminal board two screws of water collector and twelve screws of right rear panel and remove the right rear panel Screws of right rear panel Screws of top cover Screws of front pane...

Page 101: ...cover right front side panel and front panel from item 1 step 1 4 2 Remove the hex nut fixing the fan 3 Remove the fan 4 Remove the electrical control box cover Screws of big handle Screws of right rear panel Screws of terminal board Screws of water collector ...

Page 102: ...screws Note There are two kinds of screws Please pay attention to it when install the fan motor 3 Electrical parts How to remove the electrical parts 1 Perform work of item 1 2 2 Remove the ten screws fixing the IPM board 3 Unfasten the connector of the reactor 4 Unfasten the connector of the compressor IPM board PCB board ...

Page 103: ...er parts Connectors CN17 T3 T4 temp sensor 2p 2p white CN7 Tdischarge temp sensor 2p white CN12 Ttop temp sensor 2p white CN15 T2B A B C temp sensor 2p 2p 2p white CN18 CN19 CN22 Electronic expansive valve A B C 6p 6p 6p red red red CN25 CN23 CN20 S A S B S C 3p 3p 3p white white white Wires CN1 CN2 4 way valve blue blue CN5 CN6 Crankcase heating cable red red CN3 L1 IN red CN7 CN15 CN17 CN18 CN19...

Page 104: ...f 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 6 Remove the discharge pipe and suction pipe with a burner 7 Remove the hex nuts and CN1 CN2 CN3 CN5 CN6 CN4 CN20 CN23 CN25 ...

Page 105: ...inductance 4 Disconnect two pieces of wires connected from the cover of inductance 5 Remove two screws of reactor and remove the reactor 6 The 4 way valve How to remove the 4 way valve 1 Perform work 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 Screws of cover ...

Page 106: ...nsion 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 Coils Expansion valves ...

Page 107: ...ws of right front side panel and remove the right front side panel 2 screws 4 Remove the screws of front panel and remove the front panel 10 screws 5 Remove the screws of big handle and remove the big handle 2 screws 6 Remove two screws of terminal board and eleven screws of right rear panel and remove the right rear panel Screws of top cover Screws of right front side panel Screws of right rear p...

Page 108: ...Screws of front panel Screws of right rear panel Screws of top cover ...

Page 109: ...e electrical control box cover 5 Disconnect the fan motor connector CN37 5p white from the PCB board 6 Remove the fan motor after unfastening six fixing screws 3 Electrical parts How to remove the electrical parts 1 Perform work of item 1 2 2 Remove the ten screws fixing the IPM board 3 Unfasten the connector of the reactor 4 Unfasten the connector of the compressor IPM board PCB board ...

Page 110: ...5 Disconnect following 5 pieces of connection wires and connectors between IPM and PCB L OUT red N OUT blue CN38 2p white CN21 5p white CN39 2p blue ...

Page 111: ...e CN18 CN19 CN22 Electronic expansive valve A B C 6p 6p 6p red red red CN25 CN23 CN20 S A S B S C 3p 3p 3p white white white Wires CN1 CN2 4 way valve blue blue CN5 CN6 Crankcase heating cable red red CN3 L1 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 CN7 CN15 CN17 CN18 CN19 CN22 CN1 CN2 CN3 CN5 CN...

Page 112: ...gerant 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 113: ... of wires connected from the cover of inductance 5 Remove two screws of reactor and remove the reactor 6 The 4 way valve How to remove the 4 way valve 1 Perform work 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 Screws of cover of inductance Screws of reactor Co...

Page 114: ...nsion 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 Coils Expansion valves ...

Page 115: ...panel and remove the right front side panel 2 screws 4 Remove the screws of front panel and remove the front panel 10 screws 5 Remove the screws of big handle and remove the big handle 4 screws 6 Remove two screws of terminal board two screws of water collector and thirteen screws of right rear panel and remove the right rear panel Screws of top cover Screws of front panel Screws of right front si...

Page 116: ...Screws of big handle Screws of right rear panel Screws of water collector Screws of terminal board ...

Page 117: ... unfastening four fixing screws 3 Electrical parts How to remove the electrical parts 1 Perform work of item 1 2 2 Disconnect the following connection wires and connectors on the IPM P red connected to P2 on PCB N blue connected to P4 on PCB UVW blue red black connected to compressor CN1 5p white connected to CN7 on PCB CN202 2p white connected to CN8 on PFC CN3 2p white connected to CN34 on PCB 3...

Page 118: ...CN12 blue red connected to rectifier and red blue connected to P1 and P3 on PCB CN7 4p red connected to CN11 on PCB CN8 2p white connected to CN202 on IPM 5 Remove the PFC board after remove the two screws 6 Disconnect four wires red blue from PFC and black red from PCB then the rectifier can be removed CN7 CN8 CN12 R CN12 C ...

Page 119: ...ase heating cable CN11 4p red connected to CN7 on PFC CN13 T2B A B C D temp sensor 2p 2p 2p 2p white CN33 Tdischarge temp sensor 2p white CN8 T3 T4 T3 T4 temp sensor 2p 2p white CN9 High and low pressure switch 2p 2p white CN18 CN19 CN20 CN21 electronic expansive valve A B C D 6p 6p 6p 6p red red red red CN27 CN28 CN29 CN30 S A B C D 3p 3p 3p 3p white white white white CN1 CN2 red black connected ...

Page 120: ...ate 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 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 CN1 CN2 ...

Page 121: ...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 Coils ...

Page 122: ...10 Exploded Views Available under a separate document file ...

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