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Service manual

DM15-01.01.11-01en

Multi DC inverter R410A. Outdoor unit

11.3.2.7 Current protection of compressor (ODU P3)

Model

M2OD-18HFN1-
Q

M3OD-21HFN1-
Q

M3OD-26HFN1-
Q

M4OD-28HFN1-
Q

M4OA-36HFN1-
Q

M5OC-36HFN1-
Q

M5OD-42HFN1-
Q

Max
protectio
n current

14A 15A 15A 18A 23A 23A 25A

Содержание M2OD-16HFN1-Q

Страница 1: ...RVICE MANUAL MIDEA SUPER DC INVERTER MULTI TYPE DC MULTI OUTDOOR UNITS M2OD 16HFN1 Q M2OD 18HFN1 Q M3OD 21HFN1 Q M3OD 26HFN1 Q M4OD 28HFN1 Q M4OA 36HFN1 Q M5OC 36HFN1 Q M5OD 42HFN1 Q DM15 01 01 11 01e...

Страница 2: ...TENTS 1 GENERAL INFORMATION OF OUTDOOR UNITS 3 2 FEATURES 4 3 SPECIFICATION 5 4 DIMENSIONS 17 5 WIRING DIAGRAM 22 6 REFRIGERATION CYCLE DIAGRAM 25 7 INDOOR UNITS COMBINATION 28 8 SOUND LEVELS 31 9 INS...

Страница 3: ...1 General information of Outdoor Units Model name Dimension mm M2OD 18HFN1 Q 810x310x558 M2OD 18HFN1 Q 845x320x700 M3OD 21HFN1 Q 845x320x700 M3OD 26HFN1 Q 845x320x700 M4OD 28HFN1 Q 900x315x860 M4OA 3...

Страница 4: ...y at operation mode It protects the valves and prevents water from dripping 4 way valve control It is only operated in the heating operation mode except defrosting operation Outdoor unit Power relay c...

Страница 5: ...motor Model WZDK40 38G W 1 WZDK40 38G W 1 Qty 1 1 Output W 40 Output 40 Output Capacitor F Speed Hi Med Lo r min 800 800 Outdoor coil Number of rows 2 2 Tube pitch a row pitch b mm 25 4x22 25 4x22 Fi...

Страница 6: ...0 10 OU lower than IU m 15 15 Max height difference between indoor units m 10 10 Ambient temperature Cooling 15 50 15 50 Heating 15 24 15 24 Remarks 1 The above design and specifications are subject t...

Страница 7: ...Capacitor F Refrigerant oil ml ESTER OIL VG74 500 ESTER OIL VG74 500 Outdoor fan motor Model WZDK50 38G WZDK50 38G Qty 1 1 Output W 50 50 Capacitor F Speed Hi Med Lo r min 750 750 Outdoor coil Number...

Страница 8: ...0 10 OU lower than IU m 15 15 Max height difference between indoor units m 10 10 Ambient temperature Cooling 15 50 15 50 Heating 15 24 15 24 Remarks 1 The above design and specifications are subject t...

Страница 9: ...p LRA A Thermal protector position Capacitor F Refrigerant oil ml ESTER OIL VG74 820 Outdoor fan motor Model WZDK72 38G Qty 1 Output W 72 Output Capacitor F Speed Hi Med Lo r min 800 Outdoor coil Numb...

Страница 10: ...than IU m 10 OU lower than IU m 15 Max height difference between indoor units m 10 Ambient temperature Cooling 15 50 Heating 15 24 Remarks 1 The above design and specifications are subject to change w...

Страница 11: ...Locked rotor Amp LRA A Thermal protector position Capacitor F Refrigerant oil ml 1070 Outdoor fan motor Model WZDK180 38G Qty 1 Output W 180 Capacitor F Speed Hi Med Lo r min 850 Outdoor coil Number...

Страница 12: ...than IU m 10 OU lower than IU m 15 Max height difference between indoor units m 10 Ambient temperature Cooling 15 50 Heating 15 24 Remarks 1 The above design and specifications are subject to change w...

Страница 13: ...al protector position Capacitor F Refrigerant oil ml FV50S 1070 Outdoor fan motor Model WZDK180 38G Qty 1 Output W 180 Capacitor F Speed Hi Med Lo r min 850 Outdoor coil Number of rows 2 Tube pitch a...

Страница 14: ...than IU m 10 OU lower than IU m 15 Max height difference between indoor units m 10 Ambient temperature Cooling 15 50 Heating 15 24 Remarks 1 The above design and specifications are subject to change w...

Страница 15: ...20 Rated current RLA A 13 4 Locked rotor Amp LRA A Thermal protector position Internal Capacitor F Refrigerant oil ml 1400 Outdoor fan motor Model WZDK180 38G Qty 1 Output W 180 Capacitor F Speed Hi M...

Страница 16: ...than IU m 10 OU lower than IU m 15 Max height difference between indoor units m 10 Ambient temperature Cooling 15 50 Heating 15 24 Remarks 1 The above design and specifications are subject to change w...

Страница 17: ...01 01 11 01en Service manual Multi DC inverter R410A Outdoor unit 17 4 Dimensions M2OD 18HFN1 Q D2 348 558 H W2 64 795 W 549 W1 810 W3 A2 61 6 A1 25 4 R20 R7 7 289 D3 D1 325 10 B1 66 6 B2 104 2 50 H1...

Страница 18: ...M15 01 01 11 01en 18 Multi DC inverter R410A Outdoor unit M3OD 21HFN1 Q M3OD 26HFN1 Q 560 W1 H 6 D1 335 D2 360 845 W 313 D3 335 D1 R6 R5 A1 22 A2 50 B1 120 110 B2 700 W2 73 58 58 58 58 58 110 H1 H2 20...

Страница 19: ...01 11 01en Service manual Multi DC inverter R410A Outdoor unit 19 M4OD 28HFN1 Q 900 W 590 W1 860 H 12 D2 355 D1 333 302 D3 333 D1 50 97 90 B2 B1 8 A2 55 55 55 55 55 55 55 110 62 W2 H1 H2 R6 238 4 285...

Страница 20: ...Service manual DM15 01 01 11 01en 20 Multi DC inverter R410A Outdoor unit M4OA 36HFN1 Q 624 W1 990 W D2 397 D1 366 965 10 H 78 W2 340 366 D3 D1 125 145 B1 B2 60 22 A2 A1 55 140 H1 H2 R5 R6...

Страница 21: ...DM15 01 01 11 01en Service manual Multi DC inverter R410A Outdoor unit 21 M5OC 36HFN1 Q M5OD 42HFN1 Q 990 W W2 81 624 W1 D2 397 D1 366 55 H1 965 H 153 H2 366 D1 B2 125 B1 145 D3 345 60 22 A2 A1 R5 R6...

Страница 22: ...Service manual DM15 01 01 11 01en 22 Multi DC inverter R410A Outdoor unit 5 Wiring Diagram M2OD 18HFN1 Q...

Страница 23: ...DM15 01 01 11 01en Service manual Multi DC inverter R410A Outdoor unit 23 M3OD 21HFN1 Q M3OD 26HFN1 Q M4OD 28HFN1 Q...

Страница 24: ...Service manual DM15 01 01 11 01en 24 Multi DC inverter R410A Outdoor unit M4OA 36HFN1 Q M5OC 36HFN1 Q M5OD 42HFN1 Q...

Страница 25: ...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 1 drive 3 type LIQUID VALVE...

Страница 26: ...S VALVE D Accumulator High pressure switch Low pressure switch T2B A Evaporator temp sensor outlet T2B B T2B C T2B D 5 4 Refrigeration circuit drawing of M5OC 36HFN1 Q LIQUID VALVE A GAS VALVE A HEAT...

Страница 27: ...ator temp sensor T1 Room temp sensor T3 Condenser 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 CAPI...

Страница 28: ...8 7 7 7 7 9 9 9 9 9 7 7 7 7 7 7 9 9 7 9 9 12 9 7 9 9 12 18 18 7 7 9 7 9 12 9 9 12 7 7 7 9 7 7 9 12 7 9 12 12 12 7 12 9 18 7 7 12 7 9 18 9 9 18 7 7 7 12 7 7 12 12 9 9 9 9 18 7 18 12 12 7 7 18 7 12 12 9...

Страница 29: ...12 18 18 9 9 18 18 7 7 7 9 7 7 12 12 7 9 12 12 9 9 9 9 9 12 12 12 7 7 7 12 7 7 12 18 7 9 12 18 9 9 9 12 9 12 12 18 7 7 7 18 7 7 18 18 7 9 18 18 9 9 9 18 12 12 12 12 7 7 9 9 7 9 9 9 7 12 12 12 9 9 12 1...

Страница 30: ...18 18 7 7 7 9 7 7 12 12 7 9 12 12 9 9 9 9 9 12 12 12 7 7 7 12 7 7 12 18 7 9 12 18 9 9 9 12 9 12 12 18 7 7 7 18 7 7 12 24 7 9 12 24 9 9 9 18 12 12 12 12 7 7 7 24 7 7 18 18 7 9 18 18 9 9 9 24 12 12 12...

Страница 31: ...t 31 8 Sound Levels H 1 0m Outdoor Unit Microphone Note H 0 5 height of outdoor unit Model Noise Power dB A Noise level dB A M2OD 18HFN1 Q W190 65 56 M3OD 21HFN1 Q 68 59 M3OD 26HFN1 Q 68 58 M4OD 28HFN...

Страница 32: ...ch are determined by the maximum current indicated on the nameplate which located on the side panel of the unit Please refer to the nameplate before selecting the cable fuse and switch 9 3 Pipe length...

Страница 33: ...mm inch Indoor unit A B C D Liquid 6 35 1 4 Gas 9 52 3 8 9 4 Installation for the first time Air and moisture in the refrigerant system have undesirable effects as below Pressure in the system rises O...

Страница 34: ...ure can t achieve 0 1Mpa after pumping 50 minutes please check if there are some leakage points Fully close the handle Lo valve of the manifold valve and stop the operation of the vacuum pump Confirm...

Страница 35: ...r purging the air use a torque wrench to tighten the flare nut on the 2 way valve 4 Check the gas leakage Check the flare connections for gas leakage 5 Discharge the refrigerant Close the valve on the...

Страница 36: ...r 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 the electronic scale and record the weight 4 Operate the air condit...

Страница 37: ...the charge set to purge the air be careful of the liquid refrigerant 3 Put the charging cylinder onto the electronic scale and record the weight 4 Operate the air conditioner at the cooling mode 5 Op...

Страница 38: ...andle lo to the 3 way valves gas service port 3 Air purging of the charge hose Open the handle Lo valve of the manifold valve slightly to purge air from the charge hose for 5 seconds and then close it...

Страница 39: ...minute repeat 3 times After purging the air use a torque wrench to tighten the flare nut on the 2 way valve 4 Check the gas leakage Check the flare connections for gas leakage 5 Discharge the refriger...

Страница 40: ...3 way valves are set to the opened position 2 Connect the vacuum pump to 3 way valve s service port 3 Evacuation for approximately one hour Confirm that the compound meter indicates 0 1Mpa 4 Close the...

Страница 41: ...ecord the weight 4 Open the valves Low side on the charge set and charge the system with liquid refrigerant If the system cannot be charge with the specified amount of refrigerant or can be charged wi...

Страница 42: ...10A Outdoor unit For M5OD 42HFN1 Q There are one low pressure centralized valve and one high pressure centralized valve it will be more time saving when vacumm and recycle refrigerant But refer to the...

Страница 43: ...display tube display function In standby the LED displays In compressor operation the LED display the running frequency In defrosting mode The LED displays dF or alternative displays between running...

Страница 44: ...to compressor control chip 17 A indoor unit evaporator outlet temp T2BA If the temp is lower than 9 degree the digital display tube will show 9 If the temp is higher than 70 degree the digital display...

Страница 45: ...equency limit caused by T4 T3 and current Bit6 Frequency limit caused by PFC Bit5 Frequency limit caused by T4 Bit4 Frequency limit caused by T2 Bit3 Frequency limit caused by T3 Bit2 Frequency limit...

Страница 46: ...N 3 2 1 5 1 0 5 0 Heating mode 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 value N 3 2 1 5 1 0 5 0 10 4 4 Number of indoor unit Display Number of indoor unit 1 1 2 2 3 3 4 4...

Страница 47: ...10 5 4 Compressor current limit protection If the compressor current exceeds the current limit value for 10 seconds the compressor frequency will be limited as below table Cooling mode Current frequen...

Страница 48: ...the feedback signal from the outdoor units for 2 minutes the AC will stop and display the failure 10 5 6 High condenser coil temp protection When T3 65 for 3 seconds the compressor will stop while th...

Страница 49: ...P4 5 Inverter compressor drive protection P5 6 Mode conflict P6 7 Low pressure protection Just matching with M4OA 36HFN1 Q M4OD 28HFN1 Q M5OC 36HF N1 Q M5OD 42HFN1 Q O light X off flash Light Commerc...

Страница 50: ...onnector of sensor is defective F3 No C Indoor unit coil outlet temperature sensor or connector of sensor is defective F4 No D Indoor unit coil outlet temperature sensor or connector of sensor is defe...

Страница 51: ...nverter R410A Outdoor unit 51 11 3 Trouble shooting 11 3 1 For the indoor unit 11 3 1 1 Indoor EEPROM malfunction EEPROM An electrically erasable programmable read only memory whose contents can be er...

Страница 52: ...Service manual DM15 01 01 11 01en 52 Multi DC inverter R410A Outdoor unit 11 3 1 2 Indoor outdoor units communication error...

Страница 53: ...2 IPM or outdoor main PCB For M4OD 28HFN1 Q tri zone Self Check Power Operating Self Check Operating Pic 2 IPM or outdoor main PCB For M2OD 18HFN1 Q M4OA 36HFN1 Q qui zone Pic 1 check the voltage of...

Страница 54: ...ice manual DM15 01 01 11 01en 54 Multi DC inverter R410A Outdoor unit PIC3 Main board LED when power on and unit standby PIC 4 check point button Press 1 time for check how many indoor units are conne...

Страница 55: ...tage 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 2 Indoor DC fan motor control chip...

Страница 56: ...ut and output For split type NO Color Signal Voltage 1 Red Vs Vm 280V 380V 2 3 Black GND 0V 4 White Vcc 14 17 5V 5 Yellow Vsp 0 5 6V 6 Blue FG 14 17 5V For other types NO Color Signal Voltage 1 Red Vs...

Страница 57: ...circuit of temperature sensor Check the connections between temperature sensor and PCB Are the connections good Correct the connections No Yes No Replace the sensor Replace the indoor PCB Measure the...

Страница 58: ...ulti DC inverter R410A Outdoor unit 11 3 2 For the outdoor unit 11 3 2 1 Outdoor EEPROM malfunction ODU E0 EEPROM An electrically erasable programmable read only memory whose contents can be erased an...

Страница 59: ...DM15 01 01 11 01en Service manual Multi DC inverter R410A Outdoor unit 59 11 3 2 2 Communication malfunction between IPM board and outdoor main board ODU E3...

Страница 60: ...between L L1 and N L2 is about 220 240VAC Check the power supply Check whether the voltage of IPM board P and N is normal DC277 356V for 18 27KBtu h DC277 410V for 36 42KBtu h Replace bridge rectifier...

Страница 61: ...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 ha...

Страница 62: ...Service manual DM15 01 01 11 01en 62 Multi DC inverter R410A Outdoor unit 11 3 2 5 High pressure protection ODU P1 For M4OA 36HFN1 Q M4OD 28HFN1 Q M5OC 36HFN1 Q M5OD 42HFN1 Q...

Страница 63: ...al the value is o Yes Yes Connect it well Replace outdoor main board No Replace low pressure protector No Whether the low pressure protector is broken Check whether the outdoor ambient temperature is...

Страница 64: ...lti DC inverter R410A Outdoor unit 11 3 2 7 Current protection of compressor ODU P3 Model M2OD 18HFN1 Q M3OD 21HFN1 Q M3OD 26HFN1 Q M4OD 28HFN1 Q M4OA 36HFN1 Q M5OC 36HFN1 Q M5OD 42HFN1 Q Max protecti...

Страница 65: ...he connection is right between compressor discharge temp sensor and PCB according to wiring diagrams Measure the resistance value of compressor discharge temp sensor If the value is not normal is norm...

Страница 66: ...place the temperature sensor No No Check whether the outdoor ambient temperature is higher than 50 No Stop the unit Yes Check if the outdoor unit ventilation is good Yes Make the outdoor unit ventilat...

Страница 67: ...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 Repla...

Страница 68: ...ing 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...

Страница 69: ...15 0 41164 4 44 0000 36 6 13059 76 1 34105 116 0 40060 3 41 5878 37 5 87359 77 1 29078 117 0 38991 2 39 8239 38 5 62961 78 1 25423 118 0 37956 1 37 1988 39 5 39689 79 1 21330 119 0 36954 0 35 2024 40...

Страница 70: ...59 6 247 8 34 37 3 74 8 358 114 2 489 5 234 9 35 35 78 75 8 084 115 2 422 4 222 8 36 34 32 76 7 82 116 2 357 3 211 4 37 32 94 77 7 566 117 2 294 2 200 7 38 31 62 78 7 321 118 2 233 1 190 5 39 30 36 79...

Страница 71: ...or unit 71 2 Compressor checking Measure the resistance value of each winding by using the tester Position Resistance Value DA130M1C 31FZ DA150S1C 20FZ DA250S2C 30MT TNB306FPGMC L ASN108D22UEZ MNB36FA...

Страница 72: ...Red Black Several M P N U N U V V W W Red 4 Indoor AC Fan Motor Measure the resistance value of each winding by using the tester Posi tion Resistance Value RPG20D Weilng RPG28D T ongDe RPG28D Dayang...

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