Midea M3OC1-21HRDN1-Q, M2OC-14HRDN1-Q, M3OC-27HRDN1, M3OC1-27HRDN1-Q, M4OC-24HRDN1-Q Technical & Service Manual
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ODMI-1103-A
GD Midea Refrigeration Equipment Co.,Ltd
MULTI SPLIT TYPE, HEAT PUMP AIR CONDITIONERS
Technical service manual
R410A Multi DC inverter
220~240V-1Ph-50Hz
Outdoor units Models
M2OC-14HRDN1
M2OC-14HRDN1-Q
M2OC-18HRDN1
M2OC1-18HRDN1-Q
M3OC1-21HRDN1-Q
M3OC-27HRDN1
M3OC1-27HRDN1-Q
M4OC-24HRDN1-Q
M4OC1-27HRDN1-Q
M4OC-27HRDN1
M4OC-36HRDN1-Q
M5OA-36HRDN1-Q
ODMI-1103-A
CONTENTS
1. General information of Outdoor Units ................................... 3
2. Features .................................................................................. 4
3. Dimensions ............................................................................. 5
4. Wiring Diagram ....................................................................... 6
5. Refrigeration Cycle Diagram ................................................ 10
6. Indoor units combination ..................................................... 12
7. Electronic control function .................................................. 14
8. Troubleshooting ................................................................... 23
ODMI-1103-A
1. General information of Outdoor Units
Model name Dimension (mm) Net/Gross weight (kg) Compressor
M2OC-14HRDN1 760*590*285 39/41 DA108X1C-20FZ3
M2OC-14HRDN1-Q 760*590*285 39/41 DA108X1C-20FZ3
M2OC-18HRDN1 845*700*320 57.5/61.5 C-6RVN93H0N
M2OC1-18HRDN1-Q 845*700*320 53.5/57 DA130S1C-20FZ
M3OC1-21HRDN1-Q 845*700*320 55/60 DA130S1C-20FZ
M3OC-27HRDN1 845*700*320 59/62 C-6RZ146H1A
M3OC1-27HRDN1-Q 845*700*320 57/60.5 DA150S1C-20FZ
M4OC-24HRDN1-Q 845*700*320 56/60 DA150S1C-20FZ
M4OC-27HRDN1 900*860*315 73/78 TNB220FLHMC-L
M4OC1-27HRDN1-Q 900*860*315 73/78 DA250S2C-30MT
M4OC-36HRDN1-Q
(220057200010)
990*965*345 86/90 TNB306FPGM
M4OC-36HRDN1-Q
(220057200011)
990*965*345 86/90 TNB306FPGMC-L
M5OA-36HRDN1-Q
(220057100360)
990*965*345 86.5/91 TNB306FPGM
M5OA-36HRDN1-Q
(220057100361)
990*965*345 86.5/91 TNB306FPGMC-L
ODMI-1103-A
2. Features
The hydrophilic fin can improve the heating efficiency at operation mode.
It is only operated in the heating operation mode except defrosting operation.
It protects the valves and prevents water from dripping.
Outdoor unit
Power relay control
Hydrophilic aluminum fin
Anti-rust cabinet
Valve protection cover
4 way valve control
Low noise air flow system
Discharge pipe temperature protection
Compressor crankcase heater
ODMI-1103-A
3. Dimensions
MODEL W D H W1 A B
M2OC-14HRDN1-Q
M2OC-14HRDN1
760 285 590 823 530 290
M2OC-18HRDN1 845 320 700 908 560 335
M2OC1-18HRDN1-Q 845 320 700 908 560 335
M3OC1-21HRDN1-Q 845 320 700 908 560 335
M3OC-27HRDN1 845 320 700 908 560 335
M3OC1-27HRDN1-Q 845 320 700 908 560 335
M4OC-24HRDN1-Q
845 320 700 908 560 335
M4OC-27HRDN1
M4OC1-27HRDN1-Q
900 315 860 980 590 333
M4OC-36HRDN1-Q
M5OA-36HRDN1-Q
990 345 965 1075 624 366
ODMI-1103-A
4. Wiring Diagram
4.1 M2OC-14HRDN1-Q
4.2 M2OC-14HRDN1
ODMI-1103-A
4.3 M2OC1-18HRDN1-Q 、M3OC1-21HRDN1-Q
4.4 M2OC-18HRDN1、M3OC-27HRDN1
ODMI-1103-A
4.5 M3OC1-27HRDN1-Q、M4OC-24HRDN1-Q
4.6 M4OC1-27HRDN1-Q、M4OC-27HRDN1
ODMI-1103-A
4.7 M4OC-36HRDN1
4.8 M5OA-36HRDN1-Q
ODMI-1103-A
5. Refrigeration Cycle Diagram
5.1 Refrigeration circuit drawing of inverter binary type
4.2 Refrigeration circuit drawing of inverter trinary type
5.3 Refrigeration circuit drawing of inverter quadplex type
ODMI-1103-A
5.4 Refrigeration circuit drawing of inverter quintuple type
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