Midea R32 M thermal Arctic Mono fault L5

What it means

Zero speed protection detected by refrigerant system main PCB. Displayed as P6/H4 on user interface.

Likely causes

1. Wire not connected properly
2. Inverter module PCB malfunction
3. Compressor failure
4. Compressor not reaching minimum speed
5. Compressor not rotating
6. Motor stall
7. Discharge temperature exceeding 105°C indicating high compressor load or high ambient/system conditions
8. Crushed or bent pipe
9. Blocked EXV
10. Dirty filter
11. Compressor current exceeding Currentmax threshold

Where to start

1. Check if wire is connected properly
2. Check if inverter module PCB has malfunctioned
3. Check LED301 flashing pattern on inverter module. L5 error shows 13 flashes and stops for 1 second, then repeats with LED302 always on red