Midea M2OD-14HFN1-Q Service Manual
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Midea M2OD-14HFN1-Q Service Manual

Super dc inverter multi type
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SERVICE MANUAL

MIDEA AIRCONDITIONER
EUROPE MARKET
SUPER DC INVERTER MULTI TYPE
M2OD-14HFN1-Q
M2OD-16HFN1-Q
M2OD-18HFN1-Q
M3OD-21HFN1-Q
M3OD-26HFN1-Q
M3OD-27HFN1-Q
M4OD-28HFN1-Q
M4OA-36HFN1-Q
M5OC-36HFN1-Q
M5OD-42HFN1-Q
DC MULTI OUTDOOR UNITS

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Summary of Contents for Midea M2OD-14HFN1-Q

  • Page 1: Service Manual

    SERVICE MANUAL MIDEA AIRCONDITIONER EUROPE MARKET SUPER DC INVERTER MULTI TYPE M2OD-14HFN1-Q M2OD-16HFN1-Q M2OD-18HFN1-Q M3OD-21HFN1-Q M3OD-26HFN1-Q M3OD-27HFN1-Q M4OD-28HFN1-Q M4OA-36HFN1-Q M5OC-36HFN1-Q M5OD-42HFN1-Q DC MULTI OUTDOOR UNITS...

  • Page 2: Table Of Contents

    CONTENTS 1. General information of Outdoor Units .......... 3 2. Features ..................4 3. Dimensions ..................5 4. Wiring Diagram ................12 5. Refrigeration Cycle Diagram ............16 6. Indoor units combination ............19 7. Sound Levels ................22 8. Installation Details ................ 23 9.

  • Page 3: General Information Of Outdoor Units

    General information of Outdoor Units Model name Dimension (mm) Compressor M2OD-14HFN1-Q 845x320x700 DA130M1C-31FZ ASN108D22UEZ M2OD-16HFN1-Q 810x310x558 DA130M1C-31FZ M2OD-18HFN1-Q 810x310x558 M2OD-18HFN1-Q 845x320x700 DA150S1C-20FZ M3OD-21HFN1-Q 845x320x700 DA150S1C-20FZ M3OD-26HFN1-Q 845x320x700 DA150S1C-20FZ M3OD-27HFN1-Q 900x315x860 DA250S2C-30MT M4OD-28HFN1-Q 900x315x860 DA250S2C-30MT M4OA-36HFN1-Q 990x345x965 TNB306FPGMC-L M5OC-36HFN1-Q 990x345x965 TNB306FPGMC-L...

  • Page 4: Features

    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: Dimensions

    Dimensions M2OD-14HFN1-Q, M2OD-18HFN1-Q 200.7 D1 335 560 W1 D2 360 845 W...
  • Page 6 M2OD-16HFN1-Q, M2OD-18HFN1-Q(W190) 810 W3 549 W1 D1 325 795 W D2 348 104.2 66.6 61.6 25.4 R7.7...
  • Page 7 M3OD-21HFN1-Q, M3OD-26HFN1-Q 200.7 D1 335 560 W1 D2 360 845 W...
  • Page 8 M3OD-27HFN1-Q 238.4 590 W1 D1 333 900 W D2 355...
  • Page 9 M4OD-28HFN1-Q 238.4 D1 333 590 W1 900 W D2 355...
  • Page 10 M4OA-36HFN1-Q D1 366 624 W1 D2 397 990 W...
  • Page 11 M5OC-36HFN1-Q, M5OD-42HFN1-Q D1 366 624 W1 990 W D2 397 W2 81 B1 145...

  • Page 12: Wiring Diagram

    Wiring Diagram M2OD-14HFN1-Q, M2OD-18HFN1-Q...
  • Page 13 M2OD-16HFN1-Q, M2OD-18HFN1-Q(W190)
  • Page 14 M3OD-27HFN1-Q, M3OD-21HFN1-Q, M3OD-26HFN1-Q M4OD-28HFN1-Q M4OA-36HFN1-Q...
  • Page 15 M5OC-36HFN1-Q, M5OD-42HFN1-Q...

  • Page 16: Refrigeration Cycle Diagram

    Refrigeration Cycle Diagram 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 T1 Room EXCHANGE (EVAPORATOR)
  • Page 17 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 HEAT...
  • Page 18 5.5 Refrigeration circuit drawing of M5OD-42HFN1-Q INDOOR OUTDOOR EXV A CAPILIARY A LIQUID VALVE A EXV B CAPILIARY B LIQUID VALVE B EXV C CAPILIARY C CHECK VALVE LIQUID VALVE C EXV D CAPILIARY D LIQUID VALVE D Condenser temp. sensor CAPILIARY TUBE EXV E CAPILIARY E LIQUID VALVE E...

  • Page 19: Indoor Units Combination

    Indoor units combination Indoor unit combination for M2OD-14HFN1-Q One unit Two unit 9+12 7+12 Indoor unit combination for M2OD-16HFN1-Q One unit Two unit 9+12 7+12 Indoor unit combination for M2OD-18HFN1-Q One unit Two unit 9+12 7+12 9+18 7+18 12+12 Indoor unit combination for M3OD-21HFN1-Q, M3OD-26HFN1-Q...
  • Page 20 Indoor unit combination for M4OD-28HFN1-Q One unit Two unit Three unit Four unit 12+18 7+7+7 7+9+9 9+9+9 7+7+7+7 7+7+9+9 7+9+9+12 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 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 7+18 12+12 7+7+18 7+12+12 9+12+12 7+7+7+18 7+9+9+9...
  • Page 21 7+7+7+7+18 7+7+9+9+9 7+9+9+9+12 9+9+9+9+9 9+12+12+12+12 7+7+7+9+9 7+7+9+9+12 7+9+9+9+18 9+9+9+9+12 12+12+12+12+12 7+7+7+9+12 7+7+9+9+18 7+9+9+12+12 9+9+9+9+18 Indoor unit combination for M5OD-42HFN1-Q One Unit Two Unit Three Unit 7+7+7 7+9+24 9+9+24 12+18+18 9+12 7+7+9 7+12+12 9+12+12 18+18+18 7+12 9+18 7+7+12 7+12+18 9+12+18 7+18 9+24 7+7+18 7+12+24...

  • Page 22: Sound Levels

    Sound Levels Outdoor Unit Microphone 1.0m Note: H= 0.5 × height of outdoor unit Model Noise Power dB(A) Noise level dB(A) M2OD-14HFN1-Q M2OD-16HFN1-Q M2OD-18HFN1-Q(W190) M2OD-18HFN1-Q(W210) M3OD-21HFN1-Q M3OD-26HFN1-Q M3OD-27HFN1-Q M4OD-28HFN1-Q M4OA-36HFN1-Q M5OC-36HFN1-Q M5OD-42HFN1-Q...

  • Page 23: Installation Details

    Installation Details 8.1 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) 8.2 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...
  • Page 24 ● Refrigerant pipe diameter is different according to indoor unit to be connected. When using the extension pipe, refer to the tables below. ● When refrigerant pipe diameter is different from that of outdoor unit union (for 18K indoor unit), additional transfer connector needs to be used on outdoor unit union.
  • Page 25 (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 valves are set to the closed position.
  • Page 26 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). Air purging. Open the valves on the charging cylinder and the charge set. Purge the air by loosening the flare nut on the 2-way valve approximately 45’...
  • Page 27 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. If the refrigerant is R410A, make the cylinder bottom up to ensure the liquid charge. 2).
  • Page 28 8.5 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 29 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. 2).
  • Page 30 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. 3).
  • Page 31 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). Evacuation for approximately one hour. Confirm that the compound meter indicates -0.1Mpa. 4). Close the valve (Low side) on the charge set, turn off the vacuum pump, and confirm that the gauge needle does not move (approximately 5 minutes after turning off the vacuum pump).
  • Page 32 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.
  • Page 33 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 previous instruction when vacumm and recycle refrigerant.

  • Page 34: Electronic Control Function

    Electronic control function 9.1 Abbreviation T1: Indoor ambient temperature T2: Coil temperature of indoor heat exchanger middle. T2B: Coil temperature of indoor heat exchanger outlet. T3: Coil temperature of outdoor heat exchanger T4: Outdoor ambient temperature T5: Compressor discharge temperature Ts: Setting temperature 9.2 Electric control working environment.
  • Page 35 9.4 Outdoor unit point check function There is a check switch in outdoor PCB. Press the switch N times it will display the content corresponding to No. N. After getting into the check function, it will display No. N with 1.5s, meanwhile the low bit decimal of digit display flashing, indicated to get into the check function display.
  • Page 36 For example ,the digital display tube show “Cd”, it means AD value is AD value of voltage 205. EXV open angle for A indoor unit Actual data/4. EXV open angle for B indoor unit If the value is higher than 99, the digital display tube will show single EXV open angle for C indoor unit digit and tens digit.
  • Page 37 Capacity area Norm value (N) Heating mode T1 Ts Capacity area Norm value (N) 9.4.4 Number of indoor unit Display Number of indoor unit 9.4.5 Opening degree of electronic expansion valve: Actual opening degree equals the display data times 4...
  • Page 38 9.5 Protection 9.5.1 Three minutes delay at restart for compressor. 9.5.2 Temperature protection of compressor discharge. When the compressor discharge temp. is getting higher, the running frequency will be limited as below rules: ----If 102℃<T5<115℃, decrease the frequency to the lower level every 2 minutes till to F1. ---If T5>115℃...
  • Page 39 3 minutes. HEAT_F15 IHEATLMT11 HEAT_F14 IHEATLMT10 After that, the frequency will be adjusted according to the capacity demand and rise to the upper level every 3 minutes HEAT_F13 IHEATLMT9 (When the frequency>Heat_F4 via capacity demand). HEAT_F12 IHEATLMT8 HEAT_F11 IHEATLMT7 HEAT_F10 IHEATLMT6 HEAT_F9 IHEATLMT5...

  • Page 40: 10. Troubleshooting

    10. Troubleshooting Indoor unit error code explanation: 10.1 PREMIER series +OASIS series+9A series +R series +12F series +Aurora series: Display Operation lamp flash times Timer lamp Failure Indoor EEPROM malfunction Indoor / outdoor units communication error Indoor fan speed has been out of control Open or short circuit of T1 temperature sensor Open or short circuit of T2 temperature sensor Open or short circuit of T4 temperature sensor...
  • Page 41 For Console Malfunction Running lamp Timer lamp Defrosting lamp ☆ Open or short circuit of T1 temperature sensor ☆ Open or short circuit of T2 temperature sensor Communication malfunction between indoor and outdoor ☆ units. ☆ Outdoor fan speed has been out of control ☆...
  • Page 42 Outdoor unit error code explanation: 10.2 Display LED STATUS Outdoor EEPROM malfunction Indoor / outdoor units communication error Communication malfunction between IPM board and outdoor main board Open or short circuit of outdoor unit temperature sensor Voltage protection Outdoor fan speed has been out of control No A Indoor unit coil outlet temperature sensor or connector of sensor is defective No B Indoor unit coil outlet temperature sensor or connector of sensor is defective No C Indoor unit coil outlet temperature sensor or connector of sensor is defective...
  • Page 43 10.3 Trouble shooting 10.3.1 For the indoor unit 10.3.1.1 Indoor EEPROM malfunction Power off, then restart the unit 2 minutes later Replace the indoor main PCB EEPROM: An electrically erasable programmable read-only memory whose contents can be erased and reprogrammed using a pulsed voltage.
  • Page 44 10.3.1.2 Indoor / outdoor units communication error 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.
  • Page 45 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 (For M2OD-14HFN1-Q/M2OD-18HFN1-Q (W210) / M4OD-28HFN1-Q/tri-zone) Operating Self-Check Pic 2: IPM or outdoor main PCB (For...
  • Page 46 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 connected...
  • Page 47 10.3.1.3 indoor unit fan speed has been out of control Power off, then restart the Power off, then restart the unit 2 minutes later. Is it still The unit operates normally. The unit operates normally. unit 2 minutes later. Is it still displaying the error code? displaying the error code? Find out the cause and...
  • Page 48 For console: 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...
  • Page 49 10.3.1.4 Open or short circuit of temperature sensor. Check the connections Check the connections between temperature between temperature Correct the connections. Correct the connections. sensor and PCB. Are the sensor and PCB. Are the connections good? connections good? Measure the resistance value Measure the resistance value of the sensor via Appendix 1 of the sensor via Appendix 1...
  • Page 50 10.3.2 For the outdoor unit 10.3.2 1 Outdoor EEPROM malfunction(ODU E0) Power off, then restart the Power off, then restart the unit 2 minutes later unit 2 minutes later Replace the outdoor main PCB Replace the outdoor main PCB EEPROM: An electrically erasable programmable read-only memory whose contents can be erased and reprogrammed using a pulsed voltage.
  • Page 51 10.3.2.2 Communication malfunction between IPM board and outdoor main board(ODU E3) E3 display Communication malfunction between IPM board and outdoor main board Is there at least one LED in the IPM board light? Check the signal wire between the IPM board and the main board, is it connected good? Reconnect and retry.
  • Page 52 10.3.2.3 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 53 10.3.2.4 Outdoor unit fan speed has been out of control (E8) Power off, then restart the Power off, then restart the unit 2 minutes later. Is it still The unit operates normally. unit 2 minutes later. Is it still The unit operates normally. displaying the error code? displaying the error code? Find out the cause and...
  • Page 54 10.3.2.5 High pressure protection (ODU P1) (For M4OA-36HFN1-Q, M4OD-28HFN1-Q, M5OC-36HFN1-Q, M5OD-42HFN1-Q) High pressure protection High pressure protection Whether the wiring Whether the wiring between the high pressure between the high pressure switch and main control switch and main control Connect it well Connect it well board is connected well or board is connected well or...
  • Page 55 10.3.2.6 Low pressure protection (ODU P2) (For M4OA-36HFN1-Q, M4OD-28HFN1-Q, M5OC-36HFN1-Q, M5OD-42HFN1-Q) Low pressure protection Low pressure protection Whether the wiring Whether the wiring between the low pressure between the low pressure protector and main control Connect it well Connect it well protector and main control board is connected well or board is connected well or...
  • Page 56 10.3.2.7 Current protection of compressor (ODU P3) Current protection of compressor Judge 1: Check whether the input current of the power supply wire is higher than max protection current value Check whether the refrigerant system is ok Judge 2: Check whether the outdoor ambient Stop the unit temperature is higher than...
  • Page 57 10.3.2.8 Temperature protection of compressor discharge (ODU P4) Temperature protection of Temperature protection of compressor discharge compressor discharge Check whether the Check whether the Check whether the Check whether the compressor discharge temp. is compressor discharge temp. is Stop leaking and add refrigerant Stop leaking and add refrigerant refrigerant is leak refrigerant is leak...
  • Page 58 10.3.2.9 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 Check the connection between temperature Correct the connection between temperature Correct the connection...
  • Page 59 10.3.2.10 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 18-27KBtu/h; 208-230V, 1N, 60Hz can work normally? DC277-410V for 36-42KBtu/h...
  • Page 60 10.4 Main parts check Spec. Indoor unit Model 7K 11M 9K 11M 12K 11M 18K 11M Indoor fan motor WZDK20-38G WZDK20-38G WZDK20-38G WZDK58-38G Model 9K 11P 12K 11P 18K 11P Indoor fan motor WZDK20-38G WZDK20-38G WZDK20-38G Model 7K 9A 9K 9A 12K 9A 18K(RC8) 9A 18K(RC4) 9A...
  • Page 61 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 62 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 84.2190...
  • Page 63 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 54.89...

  • Page 64: Compressor Checking

    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 MNB36FAAMC-L Blue - 0.95Ω(20℃) 1.77Ω(20℃) 0.55Ω(20℃) 0.53Ω(20℃) 1.57Ω(20℃) 0.44Ω(20℃)
  • Page 65 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 (+)Red...

This manual is also suitable for:

M3od-21hfn1-qM3od-26hfn1-qM3od-27hfn1-qM2od-16hfn1-qM4od-28hfn1-qM4oa-36hfn1-q ... Show all

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