Midea MSMBC-18CRDN1-MP0W - Fan Speed Has Been out of Control Diagnosis and Solution(E3)

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9.3.4 Fan speed has been out of control diagnosis and solution(E3)
Error Code
E3/F5
Malfunction decision
conditions
When indoor fan speed keeps too low (300RPM) for certain time,
the unit will stop and the LED will display the failure.
Supposed causes ● Wiring mistake
● Fan ass’y faulty
● Fan motor faulty
● PCB faulty
Trouble shooting: