Gree GWH09ACC-K6DNA1F/I Service Manual page 58

Malfunction of module
temperature sensor
circuit
Module high
temperature
protection
Overload protection
for compressor
IPM protection
Malfunction of zero-
cross detection circuit
Internal motor (fan
motor) do not operate
Desynchro-nizing of
compressor
PFC protection
Outdoor DC fan motor
malfunction
power protection
Indoor unit and
outdoor unit doesnt
match
Failure start-up
Defrosting
The four-way valve is
abnormal
Installation and Maintenance
During cooling and drying operation,
compressor will stop while indoor fan will
P7 operate;
During heating operation, the complete
unit will stop
During cooling operation, compressor will
stop while indoor fan will operate; During
P8
heating operation, the complete unit will
stop
During cooling and drying operation,
compressor will stop while indoor fan will
H3 operate;
During heating operation, the complete
unit will stop operation.
During cooling and drying operation,
compressor will stop while indoor fan will
H5 operate;
During heating operation, the complete
unit will stop operation.
U8 The complete unit stops
Internal fan motor, external fan motor,
compressor and electric heater stop
H6
operation,guide louver stops at present
location.
During cooling and drying operation,
compressor will stop while indoor fan will
H7 operate;
During heating operation, the complete
unit will stop operation.
During cooling and drying operation,
compressor will stop while indoor fan will
HC operate;
During heating operation, the complete
unit will stop operation.
Outdoor DC fan motor malfunction lead to
L3
compressor stop operation,
compressor stop operation and Outdoor
L9 fan motor will stop 30s latter , 3 minutes
latter fan motor and compressor will restart
compressor and Outdoor fan motor cant
LP
work
During cooling and drying operation,
compressor will stop while indoor fan will
LC operate;
During heating operation, the complete
unit will stop operation.
Heating
indicator
off for Defrosting will occur in heating mode.
0.5s and Compressor will operate while indoor fan
then will stop operation.
blinks
for 10s
If this malfunction occurs during heating
U7 operation, the complete unit will stop
operation.
Replace outdoor control panel AP1
After the complete unit is de-energized for 20mins, check
whether the thermal grease on IPM Module of outdoor
control panel AP1 is sufficient and whether the radiator is
inserted tightly. If its no use, please replace control panel
AP1.
1. Wiring terminal OVC-COMP is loosened. In normal state,
the resistance for this terminal should be less than 1ohm.
2.Refer to the malfunction analysis ( discharge protection,
overload)
Refer to the malfunction analysis (IPM protection, loss of
synchronism protection and overcurrent protection of phase
current for compressor.
1.Power supply is abnormal;
2.Detection circuit of indoor control mainboard is abnormal.
1. Bad contact of DC motor feedback terminal.
2. Bad contact of DC motor control end.
3. Fan motor is stalling.
4. Motor malfunction.
5. Malfunction of mainboard revdetecting circuit.
Refer to the malfunction analysis (IPM protection, loss of
synchronism protection and overcurrent protection of phase
current for compressor.
Refer to the malfunction analysis
DC fan motor malfunction or system blocked or the connector
loosed
To protect the electronical components when detect high
power
Indoor unit and outdoor unit doesnt match
Refer to the malfunction analysis
Not the error code. It's the status code for the operation
1.Supply voltage is lower than AC175V;
2.Wiring terminal 4V is loosened or broken;
3.4V is damaged, please replace 4V.
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