Fedders GWH18MC-D3DNA1A/O, Service Manual

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59
Troubleshooting
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(1) Capacitor cha
r
ge fault (Fault with outdoor unit) (AP1 below refers to the out
door control panel)
Use AC voltmeter to check if the voltage between terminal L and N on the wiring board is within 210VAC~240VAC.
Main Check Points:
If the reactor (L) is correctly connected? If the connection is loose or fallen? If the reactor (L) is damaged?
Fault diagnosis process:
Turn on the unit
and wait 1 minute
Use DC voltmeter
to measure the
voltage on the two
ends of electrolytic
capacitor (test3)
Voltage higher than 200V?
Fault with the voltage
testing circuit on
control panel AP1
Replace the control
panel AP1
Measure the AC voltage between
terminal L and N on wiring board
XT(power supply)
Voltage within
210VAC~250VAC?
Shut down the power
and repair the power
supply to restore the
range
210VAC~250VAC
power on and
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 (test3), until the voltage
is lower than 20V
Check the
connection of reactor
(L in the Electrical
Wiring Diagram)
If the wiring of
reactor L is normal?
Connect the reactor L
according to Electrical
Wiring Diagram
Re-energize and
turn on the unit
If the fault is eliminated?
End
Replace the control
panel AP1
correctly
9.3
Troubleshooting