Related Manuals for Midea M2OC-18HRDN1-M
Summary of Contents for Midea M2OC-18HRDN1-M
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Page 1: Service Manual
ODMI-A-1110 SERVICE MANUAL MIDEA AIRCONDITIONER North America MARKET DC INVERTER MULTI TYPE M2OC-18HRDN1-M M3OC-27HRDN1-M M4OC-36HRDN1-M DC MULTI OUTDOOR UNITS... -
Page 2: Table Of Contents
ODMI-A-1110 CONTENTS 1. General information of Outdoor Units ..........3 2.Features ....................4 3. Dimensions .................... 5 4. Wiring Diagram ..................6 5. Refrigeration Cycle Diagram ..............8 6. Indoor units combination ..............10 7. Installation Details ................11 8. Electronic control function ..............20 9. -
Page 3: General Information Of Outdoor Units
ODMI-A-1110 1. General information of Outdoor Units Model name Dimension (mm(in)) Compressor M2OC-18HRDN1-M 845x320x700(33.3x12.6x27.6) DA130S1C-20FZ M3OC-27HRDN1-M 845x320x700(33.3x12.6x27.6) DA150S1C-20FZ M4OC-36HRDN1-M 990x345x965(39x13.6x38) TNB306FPGMC-L... -
Page 4: Features
ODMI-A-1110 2．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
ODMI-A-1110 3. Dimensions mm(in) Model M2OC-18HRDN1-M 845((33.3) 320(12.6) 700(27.6) 908(35.7) 560(22) 335(13.2) M3OC-27HRDN1-M M4OC-36HRDN1-M 990(39) 345(13.6) 965(38) 1075(42.3) 624(24.6) 366(14.4) -
Page 6: Wiring Diagram
ODMI-A-1110 4. Wiring Diagram 4.1 M2OC-18HRDN1-M 4.2 M3OC-27HRDN1-M... - Page 7 ODMI-A-1110 4.3 M4OC-36HRDN1-M...
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Page 8: Refrigeration Cycle Diagram
ODMI-A-1110 5. Refrigeration Cycle Diagram 8.1 Refrigeration circuit drawing of inverter dual zone Axial flow fan EXVA Auxiliary Liquid valve A Filter A Capillary Exhaust Main Capillary A temp. sensor Capillary EXVB Check Liquid valve B Filter B flow fan Condenser Coil temp. - Page 9 ODMI-A-1110...
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Page 10: Indoor Units Combination
ODMI-A-1110 6. Indoor units combination 6.1 Indoor unit combination for M2OC-18HRDN1-M Combinations Comb. Unit A Unit B — Dual(1x1) — — Dual (1x2) 6.2 Indoor unit combination for M3OC-27HRDN1-M Combinations Comb. Unit A Unit B Unit C — — TRI (1x1) —... -
Page 11: Installation Details
ODMI-A-1110 7. Installation Details 7.1 Wrench torque sheet for installation Outside diameter Torque Additional tightening torque inch N.cm N.cm $ 6.35 1500(153kgf.cm) 1600(163kgf.cm) $ 9.52 2500(255kgf.cm) 2600(265kgf.cm) $ 12.7 3500(357kgf.cm) 3600(367kgf.cm) 7.2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet. For power line: Unit dual-zone(18K outdoor unit) - Page 12 ODMI-A-1110 7.4 Installation for the first time Air and moisture in the refrigerant system have undesirable effects as below: ● Pressure in the system rises. ● Operating current rises. ● Cooling or heating efficiency drops. ● Moisture in the refrigerant circuit may freeze and block capillary tubing. ●...
- Page 13 ODMI-A-1110 points. Fully close the handle Lo valve of the manifold valve and stop the operation of the vacuum pump. Confirm that the gauge needle does not move (approximately 5 minutes after turning off the vacuum pump). 7) Turn the flare nut of the 3-way valves about 45° counterclockwise for 6 or 7seconds after the gas coming out, and then tighten the flare nut again.
- Page 14 ODMI-A-1110 2-way valve approximately 45’ until the gauge indicates 0.3 to 0.5 Mpa. 6). Disconnect the charge set and the charging cylinder, and set the 2-way and 3-way valves to the open position. Be sure to use a hexagonal wrench to operate the valve stems. 7).
- Page 15 ODMI-A-1110 from the 3-way valve’s service port immediately and turn off the air conditioner before disconnecting the hose. 7). Mount the valve stem caps and the service port Use torque wrench to tighten the service port cap to a torque of 18N.m. Be sure to check for gas leakage.
- Page 16 ODMI-A-1110 7). Mount the valve stem caps and the service port Use torque wrench to tighten the service port cap to a torque of 18N.m. Be sure to check for gas leakage. 7.6 Re-installation while the indoor unit need to be repaired 1.
- Page 17 ODMI-A-1110 Use a torque wrench to tighten the 3-way valves service port cap to a torque of 1.8 kgf.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 valves are set to the closed position. 2).
- Page 18 ODMI-A-1110 Be sure to use a hexagonal wrench to operate the valve stems. 7). Mount the valve stems nuts and the service port cap Be sure to use a torque wrench to tighten the service port cap to a torque 18N.m. Be sure to check the gas leakage.
- Page 19 ODMI-A-1110 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 20: Electronic Control Function
8. Electronic control function 8.1 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 temp. - Page 21 EXV open angle for 2# indoor unit Actual data divide 8 EXV open angle for 3# indoor unit Actual data divide 8 EXV open angle for 4# indoor unit Actual data divide 8 Power supply of outdoor unit AD data Indoor unit number The indoor unit can communicate with outdoor unit well.
- Page 22 8.4.4Number of indoor unit Display Number of indoor unit 8.4.5 Outdoor ambient temp: Corresponding Corresponding Display Corresponding temp. Display Display temp. temp. -7.5 10.5 25.5 -6.5 11.5 26.5 -5.5 11.5 27.5 -4.5 12.5 28.5 -3.5 13.5 29.5 14.5 -1.5 30.5 15.5 -0.5 31.5...
- Page 23 VOLLIMT3 VOLREL1 VOLREL2 VOLREL3 VOLFRE1 VOLFRE2 M2OC-18HRDN1-M M3OC-27HRDN1-M M4OC-36HRDN1-M Note: if the low voltage protection occurs and not resumes within 3min, it will keep the protection always after restart the machine. 8.5.4 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.
- Page 24 If the compressor frequency keeps lower than RECOILINFRE for 2hours,the AC will rise the frequency to RECOILFRE for 3mins and then resume to former frequency. Model RECOILINFRE M2OC-18HRDN1-M M3OC-27HRDN1-M M4OC-36HRDN1-M During the oil return process, the EXV and indoor units keep the current running mode, the frequency will not be limited by the compressor discharge temp.
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Page 25: Troubleshooting
9. Troubleshooting 9.1 Indoor unit error code explanation: Vertu series & 9A series: Display LED STATUS EEPROM parameter error Communication malfunction between indoor and outdoor units Zero-crossing signal error Indoor fan speed out of control Open or short circuit of outdoor temperature sensor Open or short circuit of room or evaporator coil temperature sensor Inverter module protection Over voltage or too low voltage protection... -
Page 26: Trouble Shooting
9.3 Trouble shooting 9.3.1 Indoor unit trouble shooting Indoor unit display LED STATUS EEPROM parameter error Shut off the power supply and turn on it 1 minute later The problem comes out again Is the EEPROM chip plugged in indoor PCB Correct the connection Replace the main PCB of indoor unit... - Page 27 Indoor unit display LED STATUS Communication malfunction between indoor and outdoor units Turn off the power supply, after 1 minute, connect the power supply, turn on the unit with remote controller The unit does not work normally Check the wiring between indoor and outdoor unit.
- Page 28 Indoor unit display LED STATUS Zero-crossing signal error power supply Be sure the power supply is good connection of connectors and correct the connection good? Indoor PCB is defective. Replace the indoor PCB. Indoor unit display LED STATUS Indoor fan speed out of control Is the indoor fan motor Repair the connector and connector and connection...
- Page 29 Indoor unit display LED STATUS Open or short circuit of room or evaporator coil temperature sensor Is the indoor temperature evaporator sensor Repair the connector and connector and connection reconnect good? Replace the sensor and Replace the.indoor PCB check if E6 display again? Indoor unit display LED STATUS Inverter module protection...
- Page 30 Indoor unit display LED STATUS Temperature protection of compressor top. Is the connection good? Does the compressor operate? Reconnect it Is refrigerant circulation volume normal? Replace it Is protector normal? Charge refrigerant Is the abnormality the same after gas charging? Replace the outdoor PCB.
- Page 31 9.3.2 Outdoor unit trouble shooting Outdoor unit display LED STATUS EEPROM parameter error Shut off the power supply and turn on it 1 minute later The problem comes out again Correct the connection Is the EEPROM chip plugged in indoor PCB Replace the main PCB of indoor unit Outdoor unit display LED STATUS...
- Page 32 Is connection to connector of pipe temp. sensor good? Repair connector Check the resistance of the temp. sensor according to Annex 1 Replace the sensor Outdoor unit display LED STATUS No 3 Indoor units pipe temp. sensor or connector of pipe temp. sensor is defective Is connection to connector of pipe temp.
- Page 33 Outdoor unit display LED STATUS Open or short circuit of outdoor temperature sensor Is connection to connector of pipe temp. sensor good? Repair connector Check the resistance of the temp. sensor according to Annex 1 Replace the sensor Outdoor unit display LED STATUS Compressor volt protection Check the voltage of power supply, if the voltage is about 220V, turn off the...
- Page 34 Outdoor unit display LED STATUS Communication error between outdoor IC and DSP Is the LED in outdoor main PCB light? Check the signal wires between outdoor PCBs, is it connected good. 1.Is the +5 voltage in outdoor main board? Power Board: CN4, Red wire and yellow (GND) Outdoor main PCB: CZ1 2.Is the +12v voltage in outdoor main board? Power Board: CN1, Purple wire and yellow (GND)
- Page 35 Outdoor unit display LED STATUS Temperature protection of compressor top. Off: 105c; On: 90c The trouble shooting is same with the one of indoor unit P2 protection. Outdoor unit display LED STATUS Compressor current protection Check the resistance of compressor, normally U and V is 0.6 ohm U and W is 0.6 ohm V and W is 0.6 ohm...
- Page 36 Outdoor unit display LED STATUS Condenser high-temperature protection When outdoor pipe temp. is more than 65°C, the unit will stop, and unit runs again when outdoor pipe temp. less than 52°C. Is the outdoor pipe temp. more than 65°C ? Is the outdoor pipe temp sensor right according to the annex 1 Replace the outdoor main board Replace the outdoor pipe temp sensor...
- Page 37 Outdoor unit display LED STATUS PFC module protection Check the voltage of power supply, if the voltage is about 220V, turn off the power supply and turn it on again after 1 minute Does the unit work normally ? Check whether the power supply of bridge Replace the rectifiers input port is...
- Page 38 Annex 1 Characteristic of temp. sensor Temp. ℃ Temp. ℃ Temp. ℃ Resistance K© Resistance K© Resistance K© 62.2756 14.6181 4.3874 58.7079 13.918 4.2126 56.3694 13.2631 4.0459 52.2438 12.6431 3.8867 49.3161 12.0561 3.7348 46.5725 11.5 3.5896 10.9731 3.451 41.5878 10.4736 3.3185 39.8239 3.1918...
- Page 39 Annex 2 1. Reference voltage data: Rectifier : Input :220-230V(AC), output :310V(DC) Inverter module: U,V, W 3ph. Result 60-150V(AC) 60-150V(AC) 60-150V(AC) DC 310V Photo-couple PC817, PC851: Control side <+5V, AC side :< 24V(AC) S terminal and N: changeable from 0-24V 2.