M thermal Mono
70 200204
Midea M thermal Mono Service Manual
4.13 H7 Troubleshooting
Digital display output
Description
Abnormal main circuit voltage.
M thermal Mono stops running.
Error code is displayed on refrigerant system main control board for refrigerant system and user interface.
Possible causes
Power supply voltage not within ±10% of rated voltage or a phase is missing.
Outdoor unit powered on immediately after being powered off.
Loosened wiring within electric control box.
High voltage circuit error.
Main PCB damaged.