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VRF 50/60Hz
2.10 EF: PFC fault (Only for 36-56 model)
2.10.1 Digital display output
EF
2.10.2 Description
PFC fault protection.
•
•
The system stops running.
•
Error code is displayed on the outdoor unit PCB.
2.10.3 Trigger / recover condition
•
Trigger condition:
DC bus
•
Recover condition:
DC bus
•
Reset method: Manually restart.
2.10.4 Possible causes
•
DC fan motor damaged.
•
Main PCB damaged.
2.10.5 Procedure
Detect the 220V power supply input port to
see whether the voltage is stable
Power off for 3 minutes and then repower on
Check whether fault is cleared
Outdoor unit main control board damaged
60
voltage is over 450V for continue 3 S or over 500V in the first 5 s in PFC star period.
voltage is normal in the first 5 s in PFC star period.
EF
No
No
Waiting for 220V power supply
No
Yes
Power supply is abnormal
stable
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