Midea R32 M thermal Arctic Mono fault HH

What it means

HH indicates that H6 protection has occurred 10 times in 2 hours. When an HH error occurs, a manual system restart is required before the system can resume operation. The cause of an HH error should be addressed promptly to avoid system damage. The M thermal Mono unit stops running and the error code is displayed on refrigerant system main control board and user interface.

Likely causes

1. Repeated H6 DC fan motor protection events (10 times in 120 minutes)
2. Underlying unresolved fan motor or wind/power supply issue
3. Persistent DC fan motor malfunction or environmental conditions Persistent fan motor malfunction or environmental conditions
4. Persistent fan motor malfunction, chronic power supply issues, environmental stress
5. Power or communication wires not connected properly
6. High wind speed
7. Fan motor blocked or has failed
8. Power supply abnormal
9. PFC module damaged
10. IPM module damaged
11. Main PCB damaged

Where to start

1. Review H6 fault history/frequency
2. Investigate root cause of repeated fan speed deviations before resetting
3. Count H6 occurrences within 120 minute window