How To Check Simply The Main Part - Gree GWH09RB-K3DNA2C Service Manual

Troubleshooting

9.3 How to Check Simply the Main Part

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