Lennox LI009CI-160T432 Service Manual page 64

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
Fault diagnosis process:
Start
Check wiring of the
reactor (L) of the
outdoor unit and the
PFC capacitor
Whether there is any
damage or
short-circuit?
Remove the PFC capacitor
and measure resistance
between the two terminals.
Is the resistance around zero?
Disconnect the terminals for the
reactor and measure the resistance
between the two terminals of the
reactor by an ohm gauge
Whether there is any damage
or short-circuit?
Replace the control
panel AP1
Installation and Maintenance
Yes
No
The capacitor is
Yes
short circuited and
the capacitor
should be repla-
ced
No
Yes
Replace the reactor
No
End
Replace it as per the
wiring diagram and
reconnect the wires
No
Restart the unit
No
Restart the unit
No
If the fault is eliminated?
If the fault is eliminated?
If the fault is eliminated?
Yes
Yes
Yes
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