Midea M5OA-36HRDN1-Q User Manual

ODMI-A-1202
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

Midea M5OA-36HRDN1-Q Specifications

General

Brand	Midea
Model	M5OA-36HRDN1-Q
Category	Inverter
Language	English

Summary

Technical service manual

General information of Outdoor Units

Features

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.

Valve protection cover

It protects the valves and prevents water from dripping.

Dimensions

Wiring Diagram

4.1 M2OC-14HRDN1-Q

Wiring diagram for M2OC-14HRDN1-Q model.

4.2 M2OC-14HRDN1

Wiring diagram for M2OC-14HRDN1 model.

4.3 M2OC1-18HRDN1-Q

Wiring diagram for M2OC1-18HRDN1-Q model.

4.4 M3OC1-21HRDN1-Q, M3OC1-27HRDN1-Q, M3OC-27HRDN1

Wiring diagrams for M3OC1-21HRDN1-Q, M3OC1-27HRDN1-Q, M3OC-27HRDN1 models.

4.5 M2OC-18HRDN1

Wiring diagram for M2OC-18HRDN1 model.

4.6 M4OC-24HRDN1-Q

Wiring diagram for M4OC-24HRDN1-Q model.

4.7 M4OC1-27HRDN1-Q, M4OC-27HRDN1

Wiring diagrams for M4OC1-27HRDN1-Q and M4OC-27HRDN1 models.

4.8 M4OC-36HRDN1-Q

Wiring diagram for M4OC-36HRDN1-Q model.

4.9 M50A-36HRDN1-Q

Wiring diagram for M50A-36HRDN1-Q model.

Refrigeration Cycle Diagram

5.1 Refrigeration circuit drawing of inverter binary type

Diagram of binary type refrigeration circuit.

5.2 Refrigeration circuit drawing of inverter trinary type

Diagram of trinary type refrigeration circuit.

5.3 Refrigeration circuit drawing of inverter quadplex type

Diagram of quadplex type refrigeration circuit.

5.4 Refrigeration circuit drawing of inverter quintuple type

Diagram of quintuple type refrigeration circuit.

Indoor units combination

6.1 Indoor unit combination for M2OC-14HRDN1-Q, M2OC-14HRDN1

Combinations for M2OC-14HRDN1-Q and M2OC-14HRDN1 models.

6.2 Indoor unit combination for M2OC1-18HRDN1-Q, M2OC-18HRDN1

Combinations for M2OC1-18HRDN1-Q and M2OC-18HRDN1 models.

6.3 Indoor unit combination for M3OC1-21HRDN1-Q

Combinations for M3OC1-21HRDN1-Q models.

6.4 Indoor unit combination for M3OC1-27HRDN1-Q, M3OC-27HRDN1

Combinations for M3OC1-27HRDN1-Q and M3OC-27HRDN1 models.

6.5 Indoor unit combination for M4OC-24HRDN1-Q

Combinations for M4OC-24HRDN1-Q models.

6.6 Indoor unit combination for M4OC1-27HRDN1-Q, M4OC-27HRDN1

Combinations for M4OC1-27HRDN1-Q and M4OC-27HRDN1 models.

6.7 Indoor unit combination for M4OC-36HRDN1-Q

Combinations for M4OC-36HRDN1-Q models.

6.8 Indoor unit combination for M5OA-36HRDN1-Q

Combinations for M5OA-36HRDN1-Q models.

Electronic control function

7.1 Abbreviation

Defines abbreviations used for temperature sensors and settings.

7.2 Electric Control working environment

Specifies voltage, frequency, and current limits for operation.

7.3 Outdoor unit's digital display tube

Explains the display functions of the outdoor unit's LED.

7.4 Outdoor unit point check function

Details how to check unit states using SW1.

7.4.6 Opening degree of electronic expansion valve

Explains how opening degree relates to display data.

7.5.1 Three minutes delay at restart for compressor

Specifies the delay before compressor restart.

7.5.2 Temperature protection of compressor discharge

Describes limits for compressor discharge temperature.

7.5.3 Under voltage protection

Details voltage limits for protection.

7.5.4 Compressor current limit protection

Explains frequency limits based on current.

7.5.5 Indoor / outdoor units communication protection

Describes protection if communication is lost.

7.5.6 High condenser coil temp. protection

Protection triggered by high condenser coil temperature.

7.5.7 Outdoor unit anti-freezing protection

Protection against outdoor unit freezing.

7.5.8 Oil return

Rules for oil return operation.

7.5.9 Compressor preheating functions

Conditions and modes for compressor preheating.

7.5.10 Compressor crankcase heater

Operation of the compressor crankcase heater.

Troubleshooting

8.1 Indoor unit error code explanation

Explains error codes for indoor units.

Outdoor unit error code explanation

Explains error codes for outdoor units.

8.3.1.1 Indoor EEPROM malfunction

Troubleshooting steps for indoor EEPROM errors.

8.3.1.2 Indoor / outdoor units communication error

Troubleshooting steps for communication errors.

8.3.1.3 Zero-crossing signal error

Troubleshooting steps for zero-crossing signal errors.

8.3.1.4 Indoor fan speed has been out of control

Troubleshooting steps for indoor fan speed issues.

8.3.1.5 Open or short circuit of temperature sensor

Troubleshooting for temperature sensor faults.

8.3.1.6 Full-water malfunction

Troubleshooting steps for full-water errors.

8.3.2.1 Outdoor EEPROM malfunction

Troubleshooting for outdoor EEPROM errors.

8.3.2.2 Voltage protection of compressor

Troubleshooting steps for compressor voltage protection.

8.3.2.3 Communication malfunction between IPM board and outdoor main board

Troubleshooting for IPM/main board communication issues.

8.3.2.4 Temperature protection of compressor discharge

Troubleshooting for compressor discharge temperature protection.

8.3.2.5 Temperature protection of compressor top

Troubleshooting for compressor top temperature protection.

8.3.2.6 High pressure protection

Troubleshooting steps for high-pressure protection.

8.3.2.7 Low pressure protection

Troubleshooting steps for low-pressure protection.

8.3.2.8 Current protection of compressor

Troubleshooting for compressor current protection.

8.3.2.9 IPM module protection

Troubleshooting steps for IPM module protection.

8.3.2.10 High temperature protection of condenser

Troubleshooting for high condenser temperature protection.

8.3.2.11 PFC module protection

Troubleshooting steps for PFC module protection.

8.3.2.12 Inverter compressor drive protection

Troubleshooting for inverter compressor drive protection.

Appendix 1 Temperature Sensor Resistance Value Table

Appendix 2

Appendix 3