Related Manuals for Midea M3OE-27HFN1-Q
Summarization of Contents
5. Refrigeration Cycle Diagram
5.1 Refrigeration circuit drawing of inverter 1 drive 2 type
Diagram illustrating the refrigeration circuit for a 1-drive-2 type system.
5.2 Refrigeration circuit drawing of inverter 1 drive 3 type
Diagram illustrating the refrigeration circuit for a 1-drive-3 type system.
5.3 Refrigeration circuit drawing of inverter 1 drive 4 type
Diagram illustrating the refrigeration circuit for a 1-drive-4 type system.
5.4 Refrigeration circuit drawing of inverter 1 drive 5 type
Diagram illustrating the refrigeration circuit for a 1-drive-5 type system.
6. Wiring Diagram
M2OE-14HFN1-Q, M2OF-18HFN1-Q
Wiring diagram for M2OE-14HFN1-Q and M2OF-18HFN1-Q models.
M3OE-21HFN1-Q, M3OE-27HFN1-Q
Wiring diagram for M3OE-21HFN1-Q and M3OE-27HFN1-Q models.
M4OE-28HFN1-Q
Wiring diagram for the M4OE-28HFN1-Q outdoor unit.
M4OB-36HFN1-Q
Wiring diagram for the M4OB-36HFN1-Q outdoor unit.
M5OE-42HFN1-Q
Wiring diagram for the M5OE-42HFN1-Q outdoor unit.
7. Indoor Units Combination
7.1 Indoor unit combination for M2OE-14HFN1-Q
Combinations of indoor units for the M2OE-14HFN1-Q outdoor unit.
7.2 Indoor unit combination for M2OF-18HFN1-Q
Combinations of indoor units for the M2OF-18HFN1-Q outdoor unit.
7.3 Indoor unit combination for M3OE-21HFN1-Q
Combinations of indoor units for the M3OE-21HFN1-Q outdoor unit.
7.4 Indoor unit combination for M3OE-27HFN1-Q
Combinations of indoor units for the M3OE-27HFN1-Q outdoor unit.
7.5 Indoor unit combination for M4OE-28HFN1-Q
Combinations of indoor units for the M4OE-28HFN1-Q outdoor unit.
7.6 Indoor unit combination for M4OB-36HFN1-Q
Combinations of indoor units for the M4OB-36HFN1-Q outdoor unit.
7.7 Indoor unit combination for M5OE-42HFN1-Q
Combinations of indoor units for the M5OE-42HFN1-Q outdoor unit.
9. Installation Details
9.1 Wrench Torque Sheet for Installation
Torque specifications for installation connections, ensuring proper tightness.
9.2 Connecting the Cables
Guidelines for selecting power cord size based on appliance current.
9.3 Pipe Length and Elevation
Maximum piping lengths and height differences for system configurations.
9.4 Installation for the First Time
Effects of air/moisture in the refrigerant system and leak testing procedures.
1. Air Purging with Vacuum Pump
Procedure for removing air from the system using a vacuum pump.
2. Air Purging by Refrigerant
Procedure for purging air from the system using refrigerant.
3. Adding Refrigerant for Pipe Length >5m
Procedure for adding refrigerant when pipe length exceeds 5 meters.
9.5 Adding Refrigerant After Many Years
Procedure for adding refrigerant to a system in use for many years.
9.6 Re-installation for Indoor Unit Repair
Procedure for collecting refrigerant before repairing an indoor unit.
9.7 Re-installation for Outdoor Unit Repair
Procedure for evacuating the entire system during outdoor unit repair.
2. Refrigerant Charging
Procedure for charging the air conditioning system with refrigerant.
10. Electronic Control Function
10.1 Abbreviation
Definitions of abbreviations used in the electronic control section.
10.2 Electric Control Working Environment
Working environment specifications for the electric control system.
10.3 Outdoor Unit Digital Display Tube
Explanation of the digital display tube functions and LED indicators.
10.4 Outdoor Unit Point Check Function
Procedure for using the outdoor unit point check function.
10.5 Protection
Overview of protection mechanisms for the air conditioning system.
11. Troubleshooting
11.1 Indoor Unit Error Code Explanation
Explanation of error codes for indoor unit malfunctions.
11.2 Outdoor Unit Error Code Explanation
Explanation of error codes for outdoor unit malfunctions.
11.3 Trouble Shooting
General troubleshooting procedures for common issues.
11.3.1 For the Indoor Unit
Troubleshooting specific to indoor unit malfunctions.
11.3.1.1 Indoor EEPROM Malfunction
Troubleshooting steps for indoor EEPROM malfunctions.
11.3.1.2 Indoor / Outdoor Units Communication Error
Troubleshooting steps for indoor/outdoor unit communication errors.
11.3.1.3 Indoor Unit Fan Speed Out of Control
Troubleshooting for indoor unit fan speed control issues.
11.3.1.4 Open or Short Circuit of Temperature Sensor
Troubleshooting for open/short circuits in temperature sensors.
11.3.1.5 Full-Water Malfunction
Troubleshooting steps for full-water malfunctions.
11.3.2 For the Outdoor Unit
Troubleshooting specific to outdoor unit malfunctions.
11.3.2.1 Outdoor EEPROM Malfunction (ODU E0)
Troubleshooting steps for outdoor EEPROM malfunctions.
11.3.2.2 Communication Malfunction Between IPM Board and Outdoor Main Board (ODU E3)
Troubleshooting for communication errors between IPM and outdoor main boards.
11.3.2.3 Voltage Protection (ODU E5)
Troubleshooting steps for voltage protection errors.
11.3.2.4 Outdoor Unit Fan Speed Out of Control (E8)
Troubleshooting for outdoor unit fan speed control errors.
11.3.2.5 High Pressure Protection (ODU P1)
Troubleshooting for high pressure protection issues.
11.3.2.6 Low Pressure Protection (ODU P2)
Troubleshooting for low pressure protection issues.
11.3.2.7 Current Protection of Compressor (ODU P3)
Troubleshooting for compressor current protection.
11.3.2.8 Temperature Protection of Compressor Discharge (ODU P4)
Troubleshooting for compressor discharge temperature protection.
11.3.2.9 High Temperature Protection of Condenser (ODU P5)
Troubleshooting for high condenser temperature protection.
11.3.2.10 IPM Module Protection (ODU P6)
Troubleshooting for IPM module protection.
11.4 Main Parts Check
1. Temperature Sensor Checking
Procedure for checking temperature sensor resistance values.
2. Compressor Checking
Procedure for checking compressor resistance values.
3. IPM Continuity Check
Procedure for checking IPM module continuity.
4. Indoor AC Fan Motor
Procedure for checking indoor AC fan motor resistance.
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