SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)
421 08 9204 00 67
(7) Power factor correct or (PFC) fault (a fault of outdoor unit) (AP1 hereinafter refers to the control board of the outdoor unit)
Detection:
Check if the reactor (L) of the outdoor unit and the PFC
capacitor are broken
Fault diagnosis process:
Y
Y
N
N
N
N
N
N
Y
Y
Y
Start
Check wiring of the
reactor (L) of the
outdoor unit and the
PFC capacitor
Whether there is any
damage or
short−circuit?
Replace it as per the
wiring diagram and
reconnect the wires
If the fault is eliminated?
Remove the PFC capacitor
and measure resistance
between the two terminals.
Is the resistance around zero?
The capacitor is
short circuited and
the capacitor
should be repla−
ced
Restart the unit
If the fault is eliminated?
Disconnect the terminals for the
reactor and measure the resistance
between the two terminals of the
reactor by an ohm meter
Whether there is any damage
or short−circuit?
Replace the reactor
Restart the unit
If the fault is eliminated?
Replace the control
panel AP1
End
Y
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