Power Factor Correct Or (Pfc) Fault - ComfortStar CARAT18-CD Service Manual

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
The failure diagnosis process is as follows:
Start
Check wiring of the
reactor (L) of the
outdoor unit and the
PFC capacitor
Whether there is any
damage or
short-circuit?
N
Remove the PFC capacitor
and measure resistance
between the two terminals.
Is the resistance around zero?
N
Disconnect the terminals for the
reactor and measure the resistance
between the two terminals of the
reactor by an ohmmeter
Whether there is any damage
or short-circuit?
N
Replace the control
panel AP1
End
Replace it as per the
wiring diagram and
Y
reconnect the wires
The capacitor is
short circuited and
Y
the capacitor
should be replaced
Y Replace the reactor
N
Restart the unit
If the fault is eliminated?
N
Restart the unit
N
If the fault is eliminated?
If the fault is eliminated?
Y
Y
Y