Gree GWH12ACC-K6DNA1D Service Manual page 63

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Dual-8
Malfunction
No.
Code
Name
Display
Internal motor
34
(fan motor) do
H6
not operate
Desynchro-
35
nizing of
H7
compressor
Outdoor DC
36
fan motor
L3
malfunction
power
37
L9
protection
Indoor unit
and outdoor
38
LP
unit doesnt
match
Failure start-
39
LC
up
Normal
40
communica-
tion
41
Defrosting
Malfunction of
phase current
42
detection
U1
circuit for
compressor
Malfunction of
voltage
43
U3
dropping for
DC bus-bar
60
Display Method of Indoor Unit
Indicator Display (during blinking, ON
0.5s and OFF 0.5s)
operation
Cool
Heating
Indicator
Indicator
Indicator
OFF 3S
and blink
once
(during blinking,
ON 10s and OFF
0.5s)
A/C status
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.
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 cant
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.
During cooling and drying
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
Service Manual
Possible Causes
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 rev
detecting circuit.
Refer to the malfunction analysis
(IPM protection, loss of synchronism
protection and overcurrent protection of
phase current for compressor.
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
Its the normal state
Replace outdoor control panel AP1
Supply voltage is unstable
Installation and Maintenance

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