Friedrich MRM09Y1J, Service & Parts Manual

Page: 107 / 135

107 PB
TROUBLESHOOTING
PFC (Correction Power Factor) Outdor Unit Malfuction
AP1 hereinafter refers to the control board of the outdoor unit
Check if the reactor (L) of the outdoor unit and the PFC capacitor are broken
Y
N
N
N
N
Y
Y
Start
Check wiring of the
reactor (L) of the
PFC capacitor
outdoor unit and the
Whether there is any
damage or
short-circuit?
If the fault is eliminated?
Replace it as per the
wiring diagram and
reconnect the wires
Whether there is any damage
or short-circuit?
Replace the reactor
Disconnect the terminals for the
reactor and measure the resistance
between the two terminals of the
reactor by an ohm gauge
Restart the unit
If the fault is eliminated?
Replace the control
panel AP1
End
Y