53
Installation and Maintenance
Service Manual
Outdoor unit
(1) Capacitor charge fault (Fault with outdoor unit) (AP1 below refers to the outdoor control panel)
Main Check Points:
●Use AC voltmeter to check if the voltage between terminal L and N on the wiring board is within 210VAC~240VAC.
●Is the reactor (L) correctly connected? Is the connection loose or fallen? Is the reactor (L) damaged?
Fault diagnosis process:
N
Y
N
Y
N
Y
N
Y
N
Y
Use DC voltmeter
Turn on the unit
and wait 1 minute
to measure the
voltage on the two
ends of electrolytic
capacitor
Voltage higher than 200V?
Fault with the voltage
testing circuit on
control panel AP1
Replace the control
panel AP1
Voltage within
210VAC~250VAC?
Measure the AC voltage between
terminal L and N on wiring board
XT(power supply)
power on and
Shut down the power
and repair the power
supply to restore the
range
210VAC~250VAC
restart the unit
If the fault is
eliminated?
Shut down the power and wait 20 minutes;
or use DC voltmeter to measure the voltage
on the two ends of capacitor , until the
voltage is lower than 20V
If the wiring of
Check the
connection of reactor
(L in the Electrical
Wiring Diagram)
reactor L is normal?
Re-energize and
turn on the unit
Connect the reactor
Laccording to Elec-
trical Wiring Diagr-
am correctly
If the fault is
eliminated?
End
Replace the control
panel AP1
