Midea MCD-18HRFN1-QRC4 Service Manual page 122

Troubleshooting
2.4 Solving steps for typical malfunction
2.4.1 For the indoor unit
2.4.1.1 Open or short circuit of temperature sensor
Check the connections
between temperature
No Correct the connections.
sensor and PCB. Are
the connections good?
Yes
Check the resistance value
of the sensor via Appendix 1
Is it normal? Yes Replace indoor or outdoor PCB.
No
Replace the sensor
128 Electrical Control System