Midea M4OC-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 M4OC-36HRDN1-Q Specifications

General

Brand	Midea
Model	M4OC-36HRDN1-Q
Category	Inverter
Language	English

Summary

General Information of Outdoor Units

Features

Power Relay Control

Controls power to the unit.

Low Noise Air Flow System

System designed for reduced operational noise.

Hydrophilic Aluminum Fin

Fin coating that improves heating efficiency.

4-Way Valve Control

Manages refrigerant flow direction.

Anti-Rust Cabinet

Protective coating for enhanced durability.

Valve Protection Cover

Protects valves and prevents water dripping.

Discharge Pipe Temperature Protection

Monitors and protects compressor discharge.

Compressor Crankcase Heater

Heats compressor crankcase for protection.

Dimensions

Wiring Diagram

4.1 M2OC-14HRDN1-Q Wiring Diagram

Electrical schematic for M2OC-14HRDN1-Q model.

4.2 M2OC-14HRDN1 Wiring Diagram

Electrical schematic for M2OC-14HRDN1 model.

4.3 M2OC1-18HRDN1-Q Wiring Diagram

Electrical schematic for M2OC1-18HRDN1-Q model.

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

Electrical schematics for multiple M3OC models.

4.5 M2OC-18HRDN1 Wiring Diagram

Electrical schematic for M2OC-18HRDN1 model.

4.6 M4OC-24HRDN1-Q Wiring Diagram

Electrical schematic for M4OC-24HRDN1-Q model.

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

Electrical schematics for M4OC1-27HRDN1-Q, M4OC-27HRDN1.

4.8 M4OC-36HRDN1-Q Wiring Diagram

Electrical schematic for M4OC-36HRDN1-Q model.

4.9 M5OA-36HRDN1-Q Wiring Diagram

Electrical schematic for M5OA-36HRDN1-Q model.

Refrigeration Cycle Diagram

5.1 Refrigeration circuit drawing of inverter binary type

Diagram of binary type inverter refrigeration circuit.

5.2 Refrigeration circuit drawing of inverter trinary type

Diagram of trinary type inverter refrigeration circuit.

5.3 Refrigeration circuit drawing of inverter quadplex type

Diagram of quadplex type inverter refrigeration circuit.

5.4 Refrigeration circuit drawing of inverter quintuple type

Diagram of quintuple type inverter refrigeration circuit.

Indoor Units Combination

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

Combinations for M2OC-14HRDN1-Q/M2OC-14HRDN1.

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

Combinations for M2OC1-18HRDN1-Q/M2OC-18HRDN1.

6.3 Indoor unit combination for M3OC1-21HRDN1-Q

Combinations for M3OC1-21HRDN1-Q.

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

Combinations for M3OC1-27HRDN1-Q/M3OC-27HRDN1.

6.5 Indoor unit combination for M4OC-24HRDN1-Q

Combinations for M4OC-24HRDN1-Q.

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

Combinations for M4OC1-27HRDN1-Q/M4OC-27HRDN1.

6.7 Indoor unit combination for M4OC-36HRDN1-Q

Combinations for M4OC-36HRDN1-Q.

6.8 Indoor unit combination for M5OA-36HRDN1-Q

Combinations for M5OA-36HRDN1-Q.

Electronic Control Function

7.1 Abbreviation

List of abbreviations used in electronic control.

7.2 Electric Control Working Environment

Specifications for electric control operation.

7.3 Outdoor Unit's Digital Display Tube

Description of the outdoor unit's digital display.

7.4 Outdoor Unit Point Check Function

Procedure for checking outdoor unit status.

Protection

7.5.1 Three Minutes Delay at Restart for Compressor

Delay mechanism for compressor restarts.

7.5.2 Temperature Protection of Compressor Discharge

Protection against high compressor discharge temperature.

7.5.3 Under Voltage Protection

Protection against low voltage supply.

7.5.4 Compressor Current Limit Protection

Limits compressor current to prevent damage.

7.5.5 Indoor / Outdoor Units Communication Protection

Protection for communication loss between units.

7.5.6 High Condenser Coil Temp. Protection

Protection against high condenser coil temperature.

7.5.7 Outdoor Unit Anti-Freezing Protection

Protection against outdoor unit freezing.

7.5.8 Oil Return

Rules and procedures for oil return.

Troubleshooting

8.1 Indoor Unit Error Code Explanation

Explanation of indoor unit error codes.

Outdoor Unit Error Code Explanation

Explanation of outdoor unit error codes.

8.3.1 For the Indoor Unit

Troubleshooting steps for indoor unit issues.

8.3.2 For the Outdoor Unit

Troubleshooting steps for outdoor unit issues.