Midea MOU-12HN1 User Manual page 126

Troubleshooting
f. Open-circuit and short-circuit trouble of T4
Is connection to connector of temp. sensor good?
Yes
Check the resistance of the temp. sensor according to Annex 1
Is it the resistance is normal?
Yes
Indoor PCB is defective.
g. High temperature protection of condenser
High temperature protection of condenser
Check the resistance of the temp. sensor
according to Annex 1, is it normal?
Yes
Possible reason
1. Air or other gas in the refrigerant.
2. Heat exchanger is dirty
3. Outdoor fan or fan blade is defective
4. Outdoor unit is bad ventilation
5. Refrigerant is leakage
6. Outdoor PCB is defective
124
No
Replace the sensor
No
Replace the sensor
MCAC-UTSM-2008-11
No
Repair connector
Outdoor Units