Gree GWH12AGB-K6DNA1A/O - Page 111

108
Installation and Maintenance
Service Manual
NO.
Malfunction
Name
Display
Method of
Indoor Unit
A/C status Possible Causes
Dual-8
Code
Display
32
Internal motor
(fan motor) do
not operate
H6
Internal fan motor, external fan motor,
compressor and electric heater stop
operation,guide louver stops at present
location.
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.
33
Desynchro-
nizing of
compressor
H7
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop operation.
Refer to the malfunction analysis (IPM
protection, loss of synchronism protection
and overcurrent protection of phase current
for compressor.
34
Outdoor DC
fan motor
malfunction
L3
Outdoor DC fan motor malfunction lead to
compressor stop operation,
DC fan motor malfunction or system blocked
or the connector loosed
35
power
protection
L9
compressor stop operation and Outdoor fan
motor will stop 30s latter , 3 minutes latter
fan motor and compressor will restart
To protect the electronical components when
detect high power
36
Indoor unit
and outdoor
unit doesnt
match
LP
compressor and Outdoor fan motor cant
work
Indoor unit and outdoor unit doesnt match
37
Failure start-
up
LC
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop operation.
Refer to the malfunction analysis
38 Defrosting
Heating
indicator off
for 0.5s and
then blinks
for 10s
Not the error code. Its the status code for
the operation
39
Malfunction of
phase current
detection
circuit for
compressor
U1
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
Replace outdoor control panel AP1
40
Malfunction of
voltage
dropping for
DC bus-bar
U3
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
Supply voltage is unstable