GREE ELECTRIC GWH07AGA-K6DNA1A/O Service Manual page 79

Malfunction of module
temperature sensor P7
circuit
Module high
temperature P8
protection
Overload protection
H3
for compressor
IPM protection H5
Malfunction of zero-
U8
cross detection circuit
Internal motor (fan
H6
motor) do not operate
Desynchro-nizing of
H7
compressor
PFC protection HC
Outdoor DC fan motor
L3
malfunction
power protection L9
Indoor unit and
outdoor unit doesnt LP
match
Failure start-up LC
Heating
indicator
off for
Defrosting 0.5s and
then
blinks
for 10s
The four-way valve is
U7
abnormal
76
During cooling and drying operation,
compressor will stop while indoor fan will
operate;
During heating operation, the complete
unit will stop
During cooling operation, compressor will
stop while indoor fan will operate; During
heating operation, the complete unit will
stop
During cooling and drying operation,
compressor will stop while indoor fan will
operate;
During heating operation, the complete
unit will stop operation.
During cooling and drying operation,
compressor will stop while indoor fan will
operate;
During heating operation, the complete
unit will stop operation.
The complete unit stops
Internal fan motor, external fan motor,
compressor and electric heater stop
operation,guide louver stops at present
location.
During cooling and drying operation,
compressor will stop while indoor fan will
operate;
During heating operation, the complete
unit will stop operation.
During cooling and drying operation,
compressor will stop while indoor fan will
operate;
During heating operation, the complete
unit will stop operation.
Outdoor DC fan motor malfunction lead to
compressor stop operation,
compressor stop operation and Outdoor
fan motor will stop 30s latter , 3 minutes
latter fan motor and compressor will restart
compressor and Outdoor fan motor can't
work
During cooling and drying operation,
compressor will stop while indoor fan will
operate;
During heating operation, the complete
unit will stop operation.
Defrosting will occur in heating mode.
Compressor will operate while indoor fan
will stop operation.
If this malfunction occurs during heating
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 it's 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.
Service Manual
Installation and Maintenance