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Technical Information
7. Power factor correct or (PFC) fault (a fault of outdoor unit) (AP1 hereinafter refers to the control board of
the outdoor unit)
Mainly detect:
• Check if the reactor (L) of the outdoor unit and the PFC capacitor are broken
Fault diagnosis process:
Start
NO
Check wiring of the reactor
(L) of the outdoor unit and
the PFC capacitor
Is there damage or
short-circuit?
Is the resistance
around zero?
Remove the PFC capacitor
and measure resistance
between the two terminals.
Disconnect the terminals for
the reactor and measure the
resistance between the two
terminals of the reactor by
an ohm gauge
End
NO
Replace it as per the
wiring diagram and
reconnect the wires
Is fault
eliminated?
YES
Is there damage or
short-circuit?
Replace the
control panel AP1
NO
NO
The capacitor is short
circuited and the
capacitor should be
replaced
Restart
the unit
Is fault
eliminated?
YES
YES
NO
Restart
the unit
Is fault
eliminated?
YES
NO
Replace the
reactor
