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DIAGNOSIS AND SOLUTION (CONT)
Fan speed has been out of control diagnosis and solution (E3/F5)
Error Code E3/F5
Malfunction decision conditions
When indoor fan speed remains too low (300RPM) for certain time, the unit stops and the LED
displays the failure.
Supposed causes
S Wiring mistake
S Fan assembly faulty
S Fan motor faulty
S PCB faulty
Troubleshooting
Power off, then restart the
unit 2 minutes later
Shut off the power supply,
Rotate the fan by hand.
The unit operates normally.
Find the cause and resolve it.
Check the fan motor wiring
No
Yes
No
Correct the connections.
No
No
Replace the fan motor
Yes
Yes
Measure the voltage for the
fan motor from the main
PCB
Yes
Replace the main PCBNo
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