How To Check Simply The Main Part - Gree GWH09AB-A3DNA1B 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 Points:
Use AC voltmeter to check if the voltage between terminal L and N on the wiring board is 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:
Turn on the unit
and wait 1 minute
Use DC voltmeter
to measure the
voltage on the two
ends of electrolytic
capacitor
Voltage higher than 200V?
Measure the AC voltage between
terminal L and N on wiring board
XT(power supply)
Voltage within
210VAC~250VAC?
Shut down the power and wait 20 mi
use DC voltmeter to measure the voltage
on the two ends of capacitor (test3), until
the voltage is lower than 20V
connection of reactor
(L in the Electrical
Wiring Diagram)
If the wiring of
reactor L is normal?
Replace the control
Fault with the voltage
testing circuit on
Y
control panel AP1
N
Shut down the power
and repair the power
N
supply to restore the
range
210VAC~250VAC
Y
nutes; or
Check the
Connect the reactor
Laccording to Elec-
N
trical Wiring Diagr-
am correctly
Y
panel AP1
End
Replace the control
panel AP1
power on and
restart the unit
N
Re-energize and If the fault is
turn on the unit eliminated?
N
50
If the fault is
Y
eliminated?
Y