Midea R32 M thermal Arctic Mono fault EA

What it means

Discharge pipe temperature sensor error (serial number 11), sensor Tp. Displayed on user interface and refrigerant system main PCB.

Likely causes

1. Sensor Tp disconnected, sensor malfunction, wiring break, PCB connection issue
2. Discharge temperature lower than suction temperature for more than 5 minutes
3. Possible compressor malfunction
4. Refrigerant migration/flooding
5. Faulty temperature sensor
6. Sensor Tp fault
7. Sensor wiring fault
8. Insufficient refrigerant caused by refrigerant leakage
9. Low pressure side blocked by crushed or bent pipe, blocked EXV, or dirty filter
10. Poor air side heat exchanger heat exchange in heating or DHW mode
11. Insufficient water flow rate in cooling mode
12. Outdoor main PCB fault (last resort)
13. Inverter module damaged
14. Discharge temperature exceeding 105°C indicating high compressor load or high ambient/system conditions
15. Crushed or bent pipe
16. Blocked EXV
17. Dirty filter
18. Hydronic box main PCB fault
19. Damaged cables between hydronic box main PCB and outdoor unit main PCB
20. Outdoor unit main PCB fault
21. Incorrect or abnormal input power supply (N or L)

Where to start

1. Check sensor Tp connection, measure sensor resistance, verify wiring continuity, test sensor response
2. Compare discharge temperature (Tp) to suction temperature (Th)
3. Check compressor operation