Midea MCH2U-18PHH2 Service Manual page 49

8.4.1.4 Indoor fan speed malfunction diagnosis and solution.
Malfunction conditions
Potential causes
Trouble shooting:
When indoor fan speed is too low (300RPM) for a certain period of time,
the unit ceases operation and the LED displays a failure code.
Wiring mistake
●
Faulty fan assembly
●
Faulty fan motor
●
Faulty PCB
●
49