Related Manuals for Midea M2OE-14HFN1-Q
Summary of Contents for Midea M2OE-14HFN1-Q
- Page 1 DM16-01.01.11-01en SERVICE MANUAL MIDEA AIRCONDITIONER SUPER DC INVERTER MULTI TYPE OUTDOOR UNITS M2OE-14HFN1-Q M2OF-18HFN1-Q M3OE-21HFN1-Q M3OE-27HFN1-Q M4OE-28HFN1-Q M4OB-36HFN1-Q M5OE-42HFN1-Q...
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Page 2: Table Of Contents
Service manual DM16-01.01.11-01en CONTENTS 1. GENERAL INFORMATION OF OUTDOOR UNITS ..............3 2. FEATURES............................4 3. SPECIFICATION ..........................5 4. DIMENSIONS ............................ 10 5. REFRIGERATION CYCLE DIAGRAM ..................11 6. WIRING DIAGRAM ......................... 13 7. INDOOR UNITS COMBINATION ....................16 8. -
Page 3: General Information Of Outdoor Units
DM16-01.01.11-01en Service manual General information of Outdoor Units Model name Dimension (mm) 800x333x554 M2OE‐14HFN1‐Q 800x333x554 M2OF‐18HFN1‐Q 845x363x702 M3OE‐21HFN1‐Q 845x363x702 M3OE‐27HFN1‐Q 946x410x810 M4OE‐28HFN1‐Q 946x410x810 M4OB‐36HFN1‐Q 946x410x810 M5OE‐42HFN1‐Q Multi DC inverter R410A. Outdoor unit... -
Page 4: Features
Service manual DM16-01.01.11-01en Features Outdoor unit Power relay control Low noise air flow system Hydrophilic aluminum fin The hydrophilic fin can improve the heating efficiency at operation mode. 4 way valve control It is only operated in the heating operation mode except defrosting operation. Anti-rust cabinet Valve protection cover It protects the valves and prevents water from dripping. -
Page 5: Specification
DM16-01.01.11-01en Service manual Specification Outdoor Model M2OE-14HFN1-Q M2OF-18HFN1-Q Indoor unit combination Single Double Single Double Power supply V-ph-Hz 220-240V- 50Hz, 1Ph 220-240V- 50Hz, 1Ph Capacity Btu/h 7000-14000 14000 7000-18000 18000 Input 660-1250 1200 650-1600 1643 Cooling Rated current 2.9-5.4 2.8-7.0... - Page 6 Service manual DM16-01.01.11-01en Outdoor Model M3OE-21HFN1-Q M3OE-27HFN1-Q Indoor unit combination Single Double Three Single Double Three Power supply V-ph-Hz 220-240V- 50Hz, 1Ph 220-240V- 50Hz, 1Ph Capacity Btu/h 7000-12000 14000-18000 21000 7000-18000 14000-26000 27000 Input 1000-1300 1500-1780 1917 750-1700 1400-2350 2465 Cooling Rated current 4.4-5.7...
- Page 7 DM16-01.01.11-01en Service manual Outdoor Model M4OE-28HFN1-Q Indoor unit combination Single Double Three Four Power supply V-ph-Hz 220-240V- 50Hz, 1Ph Capacity Btu/h 5000-15000 12000-21000 18000-24000 28000 Input 1334-1784 1730-2403 2234-2777 2556 Cooling Rated current 5.8-7.8 7.5-10.7 9.7-12.1 11,1 3,21 Capacity Btu/h 5000-15000 12000-21000 18000-27000...
- Page 8 Service manual DM16-01.01.11-01en Outdoor Model M4OB-36HFN1-Q Indoor unit combination Single Double Three Four Power supply V-ph-Hz 220-240V- 50Hz, 1Ph Capacity Btu/h 7000-18000 14000-26000 21000-36000 36000 Input 1250-1700 1650-2320 2150-3520 3505 Cooling Rated current 5.4-7.4 7.2-10.1 9.3-15.3 15,2 3,01 Capacity Btu/h 7000-20000 16000-29000 24000-38000...
- Page 9 DM16-01.01.11-01en Service manual Outdoor Model M5OE-42HFN1-Q Indoor unit combination Single Double Three FOUR Five Power supply V-ph-Hz 220-240V- 50Hz, 1Ph Capacity Btu/h 7000-18000 14000-28000 21000-36000 28000-40000 42000 Input 680-1800 1400-2780 2100-3450 2700-3700 3822 Cooling Rated current 3.0-8.0 6.2-11.8 9.0-15.0 11.6-16.0 16,6 3,22 Capacity...
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Page 10: Dimensions
Service manual DM16-01.01.11-01en Dimensions Unit：mm Model M2OE-14HFN1-Q M2OF-18HFN1-Q M3OE-21HFN1-Q M3OE-27HFN1-Q M4OE-28HFN1-Q 1034 M4OB-36HFN1-Q 1034 M5OE-42HFN1-Q 1034 Multi DC inverter R410A. Outdoor unit... -
Page 11: Refrigeration Cycle Diagram
DM16-01.01.11-01en Service manual Refrigeration Cycle Diagram 5.1 Refrigeration circuit drawing of inverter 1 drive 2 type INDOOR OUTDOOR EXV A CAPILIARY A LIQUID VALVE A CHECK VALVE EXV B CAPILIARY B LIQUID VALVE B Condenser temp. sensor CAPILIARY TUBE HEAT HEAT EXCHANGE T4 Ambient... - Page 12 Service manual DM16-01.01.11-01en 5.3 Refrigeration circuit drawing of inverter 1 drive 4 type INDOOR OUTDOOR EXV A CAPILIARY A LIQUID VALVE A EXV B CAPILIARY B LIQUID VALVE B CHECK VALVE EXV C CAPILIARY C LIQUID VALVE C Condenser temp. sensor EXV D CAPILIARY D CAPILIARY TUBE LIQUID VALVE D...
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Page 13: Wiring Diagram
DM16-01.01.11-01en Service manual Wiring diagram M2OE-14HFN1-Q, M2OF-18HFN1-Q M3OE-21HFN1-Q, M3OE-27HFN1-Q Multi DC inverter R410A. Outdoor unit... - Page 14 Service manual DM16-01.01.11-01en M4OE-28HFN1-Q M4OB-36HFN1-Q Multi DC inverter R410A. Outdoor unit...
- Page 15 DM16-01.01.11-01en Service manual M5OE-42HFN1-Q Multi DC inverter R410A. Outdoor unit...
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Page 16: Indoor Units Combination
Service manual DM16-01.01.11-01en Indoor units combination Indoor unit combination for M2OE-14HFN1-Q One unit Two unit 9+12 7+12 Indoor unit combination for M2OF-18HFN1-Q One unit Two unit 9+12 7+12 9+18 7+18 12+12 Indoor unit combination for M3OE-21HFN1-Q One unit Two unit... - Page 17 DM16-01.01.11-01en Service manual Indoor unit combination for M4OB-36HFN1-Q One unit Two unit Three unit Four unit 9+18 7+7+7 7+9+18 9+9+12 12+12+12 7+7+7+7 7+7+9+24 7+9+12+12 9+9+12+12 9+24 7+7+9 7+9+24 9+9+18 12+12+18 7+7+7+9 7+7+12+12 7+9+12+18 9+9+12+18 7+12 12+12 7+7+12 7+12+12 9+9+24 12+12+24 7+7+7+12 7+7+12+18 7+9+18+18...
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Page 18: Sound Levels
Service manual DM16-01.01.11-01en Sound Levels Outdoor Unit Microphone 1.0m Note: H= 0.5 × height of outdoor unit Model Noise Power dB(A) Noise level dB(A) M2OE-14HFN1-Q M2OF-18HFN1-Q 56.5 M3OE-21HFN1-Q 57.5 M3OE-27HFN1-Q 59.5 M4OE-28HFN1-Q M4OB-36HFN1-Q 63.5 M5OE-42HFN1-Q Multi DC inverter R410A. Outdoor unit... -
Page 19: Installation Details
DM16-01.01.11-01en Service manual Installation Details 9.1 Wrench torque sheet for installation Outside diameter Torque Additional tightening torque N.cm N.cm Ф6.35 1500(153kgf.cm) 1600(163kgf.cm) Ф9.52 2500(255kgf.cm) 2600(265kgf.cm) Ф12.7 3500(357kgf.cm) 3600(367kgf.cm) 9.2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet. Rated current of appliance Nominal cross-sectional area (mm²) >3 and ≤6... - Page 20 Service manual DM16-01.01.11-01en ● When refrigerant pipe diameter is different from that of outdoor unit union (for 18K indoor unit), additional transfer connector needs to be used on outdoor unit union. Indoor unit Extension pipe diameter (mm/inch) Model Pipe diameter (mm/inch) Liquid 6.35(1/4) Liquid...
- Page 21 DM16-01.01.11-01en Service manual 1. Air purging with vacuum pump (Indoor unit) (Outdoor unit) (Liquid side) Two-way valve Close (Gas side) Three-way valve Close Manifold valve Compound meter Pressure gauge -0.1MPa Handle Lo Handle Hi Charge hose Charge hose Vacuum pump Vacuum pump 1) Completely tighten the flare nuts of the indoor and outdoor units, confirm that both the 2-way and 3-way...
- Page 22 Service manual DM16-01.01.11-01en 2. Air purging by refrigerant Procedure: 1). Confirm that both the 2-way and 3-way valves are set to the closed position. 2). Connect the charge set and a charging cylinder to the service port of the 3-way valve. 3).
- Page 23 DM16-01.01.11-01en Service manual 3. Adding the refrigerant if the pipe length >5m Electronic scale Procedure: 1). Connect the charge hose to the charging cylinder, open the 2-way valve and the 3-way valve. Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder.
- Page 24 Service manual DM16-01.01.11-01en 9.5 Adding the refrigerant after running the system for many years Electronic scale Procedure: 1). Connect the charge hose to the 3-way service port, open the 2-way valve and the 3-way valve. Connect the charge hose to the valve at the bottom of the cylinder. If the refrigerant is R410A, make the cylinder bottom up to ensure liquid charge.
- Page 25 DM16-01.01.11-01en Service manual 9.6 Re-installation while the indoor unit need to be repaired 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 sure to use a hexagonal wrench to operate the valve stems.
- Page 26 Service manual DM16-01.01.11-01en 2. Air purging by the refrigerant Procedure: 1). Confirm that both the 2-way and 3-way valves are set to the closed position. 2). Connect the charge set and a charging cylinder to the service port of the 3-way valve Leave the valve on the charging cylinder closed.
- Page 27 DM16-01.01.11-01en Service manual 9.7 Re-installation while the outdoor unit need to be repaired 1. Evacuation for the whole system Procedure: 1). Confirm that both the 2-way and 3-way valves are set to the opened position. 2). Connect the vacuum pump to 3-way valve’s service port. 3).
- Page 28 Service manual DM16-01.01.11-01en 2. Refrigerant charging Procedure: 1). Connect the charge hose to the charging cylinder, open the 2-way valve and the 3-way valve Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder.
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Page 29: Electronic Control Function
DM16-01.01.11-01en Service manual Electronic control function 10.1 Abbreviation T1: Indoor ambient temperature T2: Coil temperature of indoor heat exchanger middle. T2B: Coil temperature of indoor heat exchanger outlet(This sensor is located in outdoor unit) T3: Coil temperature of outdoor heat exchanger T4: Outdoor ambient temperature T5: Compressor discharge temperature Ts: Setting temperature... - Page 30 Service manual DM16-01.01.11-01en A indoor unit capacity B indoor unit capacity The capacity unit is horse power. If the indoor unit is not connected, the digital display tube will show: “――” C indoor unit capacity (7K:0.8HP, 9K:1HP,12K:1.2HP,18K:1.5HP) D indoor unit capacity E indoor unit capacity A Indoor unit capacity demand code B Indoor unit capacity demand code...
- Page 31 DM16-01.01.11-01en Service manual Bit5=1, Bit3=1, Bit4 Frequency limit caused by T2. Bit1=1. Bit3 Frequency limit caused by T3. It means frequency limit Bit2 Frequency limit caused by T5. caused by T4,T3 Bit1 Frequency limit caused by current and current. Bit0 Frequency limit caused by voltage Average value of T2 (Sum T2 value of all indoor units)/( number of indoor units in good...
- Page 32 Service manual DM16-01.01.11-01en Cooling mode: CoolZone5 CoolZone4 CoolZone3 CoolZone2 CoolZone1 Heating mode: HeatZone4 HeatZone3 HeatZone2 HeatZone1 10.5.5 Indoor / outdoor units communication protection If the indoor units cannot receive the feedback signal from the outdoor units for 2 minutes, the AC will stop and display the failure.
- Page 33 DM16-01.01.11-01en Service manual 10.5.9 Low outdoor ambient temperature protection When compressor is off, T4 is be lower than -35 ℃ .for 10s, the AC will stop and display “LP”. When compressor is on, T4 is be lower than -40 ℃ .for 10s, the AC will stop and display “LP”. When T4 is no lower than -32 ℃...
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Page 34: 11. Troubleshooting
Service manual DM16-01.01.11-01en 11. Troubleshooting Indoor unit error code explanation: 11.1 For MTBI-18HWDN1-Q DISPLAY MALFUNCTION Timer Alarm DIGITAL TUBE Open or short circuit of T1 temperature sensor ☆ Open or short circuit of T2 temperature sensor ☆ Indoor / outdoor units communication error ☆... - Page 35 DM16-01.01.11-01en Service manual Over voltage or over low voltage protection ☆ Too low ambient temperature protection ☆ Error rotor position protection of compressor ☆ Mode conflict ☆ Low pressure protection of compressor ☆ X(off) ☆(flash at 2Hz) O (on) Outdoor unit error code explanation: 11.2 Display LED STATUS...
- Page 36 Service manual DM16-01.01.11-01en Trouble shooting 11.3 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 erased and reprogrammed using a pulsed voltage. Multi DC inverter R410A. Outdoor unit...
- Page 37 DM16-01.01.11-01en Service manual 11.3.1.2 Indoor / outdoor units communication error Multi DC inverter R410A. Outdoor unit...
- Page 38 Service manual DM16-01.01.11-01en Pic 1: check the voltage of N to S (Vs), is it moving alternately between positive value and negative value? Pic 2: IPM or outdoor main PCB Operating Self-Check Pic 2: IPM or outdoor main PCB Power, Self-Check Operating Multi DC inverter R410A.
- Page 39 DM16-01.01.11-01en Service manual PIC 3: Main board LED when power on and unit standby. PIC 4: check point button, Press 1 time for check how many indoor units are connected Multi DC inverter R410A. Outdoor unit...
- Page 40 Service manual DM16-01.01.11-01en 11.3.1.3 indoor unit fan speed has been out of control 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.
- Page 41 DM16-01.01.11-01en Service manual DC motor voltage input and output For split type: Color Signal Voltage Vs/Vm 280V~380V Black White 14-17.5V Yellow 0~5.6V Blue 14-17.5V For other types: Color Signal Voltage Vs/Vm 192V~380V Black White 13.5-16.5V Yellow 0~6.5V Blue 13.5-16.5V Multi DC inverter R410A. Outdoor unit...
- Page 42 Service manual DM16-01.01.11-01en 11.3.1.4 Open or short circuit of temperature sensor. Check the connections between temperature Correct the connections. sensor and PCB. Are the connections good? Measure the resistance value of the sensor via Appendix 1 Is it normal? Replace the sensor. Replace the indoor PCB 11.3.1.5 Full-water malfunction Multi DC inverter R410A. Outdoor unit...
- Page 43 DM16-01.01.11-01en Service manual 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 and reprogrammed using a pulsed voltage. Multi DC inverter R410A. Outdoor unit...
- Page 44 Service manual DM16-01.01.11-01en 11.3.2.2 Communication malfunction between IPM board and outdoor main board(ODU E3) Multi DC inverter R410A. Outdoor unit...
- Page 45 DM16-01.01.11-01en Service manual 11.3.2.3 Voltage protection(ODU E5) Voltage protection Check the voltage of outdoor unit power supply, whether the voltage Check the power supply between L(L1) and N (L2) is about 220~240VAC Check whether the voltage of IPM board P and N is normal? DC277-356V for 18-27KBtu/h;...
- Page 46 Service manual DM16-01.01.11-01en 11.3.2.4 Outdoor unit fan speed has been out of control (E8) Index 1: 1. Outdoor 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.
- Page 47 DM16-01.01.11-01en Service manual 11.3.2.5 High pressure protection (ODU P1) (ForM4OE-28HFN1-Q, M4OB-36HFN1-Q, M5OE-42HFN1-Q) Multi DC inverter R410A. Outdoor unit...
- Page 48 Service manual DM16-01.01.11-01en 11.3.2.6 Low pressure protection (ODU P2)(ForM4OE-28HFN1-Q, M4OB-36HFN1-Q, M5OE-42HFN1-Q) Low pressure protection Whether the wiring between the low pressure protector and main control Connect it well board is connected well or correctly Whether the low pressure protector is broken Method: Disconnect the plug.
- Page 49 DM16-01.01.11-01en Service manual 11.3.2.7 Current protection of compressor (ODU P3) Multi DC inverter R410A. Outdoor unit...
- Page 50 Service manual DM16-01.01.11-01en 11.3.2.8 Temperature protection of compressor discharge (ODU P4) Temperature protection of compressor discharge Check whether the Check whether the compressor discharge temp. is Stop leaking and add refrigerant refrigerant is leak more than 115°C ? Check whether connection is right between compressor discharge temp. Correct the wiring connection sensor and PCB according to wiring diagrams? Measure the resistance value compressor discharge temp.
- Page 51 DM16-01.01.11-01en Service manual 11.3.2.9 High temperature protection of condenser (ODU P5) When outdoor pipe temperature is more than 65°C, the unit will stop, and unit runs again when outdoor pipe temperature less than 52°C. Check the connection between temperature Correct the connection High temperature protection of sensor and PCB. condenser Check whether the condenser temperature is Check whether the...
- Page 52 Service manual DM16-01.01.11-01en 11.3.2.10 IPM module protection (ODU P6) 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 18‐28KBtu/h; 208‐230V, 1N, 60Hz can work normally? DC277‐410V for 36‐42KBtu/h Check whether the connecting line between main board and Connect it tightly, the IPM module is connected check ok or not? Check whether the Connect it correctly tightly power supply line is and tightly, check ok connected correctly and or not? tightly Check whether the connecting Connect it well, check line of the compressor is ok or not? Check whether the lines connected correctly or tightly Connect it tightly, in E‐part box are ...
- Page 53 DM16-01.01.11-01en Service manual 11.4 Main parts check 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.
- Page 54 Service manual DM16-01.01.11-01en Appendix 1 Temperature Sensor Resistance Value Table for T1,T2,T3,T4,T2B ( ℃ --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...
- Page 55 DM16-01.01.11-01en Service manual Appendix 2 Temperature Sensor Resistance Value Table for T5 ( ℃ --K) ℃ K Ohm ℃ K Ohm ℃ K Ohm ℃ K Ohm 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...
- Page 56 Service manual DM16-01.01.11-01en 2. Compressor checking Measure the resistance value of each winding by using the tester. Position Resistance Value ASN108D22UEZ ASM135D23UFZ ATF235D22UMT ATF310D43UMT Blue - 1.57Ω(20℃) 1.75Ω(20℃) 0.75Ω(20℃) 0.65Ω(20℃) Multi DC inverter R410A. Outdoor unit...
- Page 57 DM16-01.01.11-01en Service manual 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. Digital tester Normal resistance value Digital tester Normal resistance value...