Pioneer WYC009AMFI20 Service Manual page 35

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