Midea MCH2U-18PHH2 Service Manual page 51

8.4.1.5 Temperature sensor malfunction diagnosis and solution.
Malfunction conditions
Potential causes
Trouble shooting:
Check the connections
between temperature
sensor and PCB. Are
the connections good?
Yes
Check the resistance value
of the sensor via Appendix 1
and Appendix 2
Is it normal?
No
Replace the sensor
If the sampling voltage is lower than 0.06V or higher than 4.94V,
the LED displays a failure.
Wiring mistake
●
Faulty sensor
●
Faulty PCB
●
No Correct the connections.
Yes Replace indoor or outdoor PCB.
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