Gree GWH09ACC-S6DBA1A Service Manual page 59

Outdoor Unit
1. Capacity charging malfunction (outdoor unit malfunction) (AP1 below means control board of outdoor unit)
Main detection points:
● Detect if the voltage of L and N terminal of XT wiring board is between 210VAC-240VAC by alternating voltage meter;
● Is reactor (L) well connected? Is connection wire loosened or pulled out? Is reactor (L) damaged?
Turn on the unit and
wait 1 minute
Use AC voltmeter to measure
the voltage on the two ends
of electrolytic capacitor
Voltage higher
than 200V?
Measure the voltage
input with AC voltmeter
Voltage within
180VAC~260VAC?
Shut down the power and wait 20
minutes; or use DC voltmeter to
measure the voltage on the two
ends of electrolytic capacitor
until the voltage is lower than 20V
Check the connection
of reactor and connection
wire
If the wiring of
reactor L is normal?
Replace outdoor
mainboard AP1
56
Malfunction of
the outdoor
Y
mainboard AP1
N
Power supply is
abnormal; repair
the power supply
N
to restore the range
between 180VAC
~260VAC
Y
Connect the
connection
N
wire of reactor
L correctly
Y
End
Replace outdoor
mainboard
Power on and
Is the Vmalfunction
restart the unit
eliminated?
N
Power on and
Is the Vmalfunction
restart the unit
eliminated?
N
Service Manual
Y
Y
Installation and Maintenance