Gree GWH09AGA-K6DA1A Service Manual page 71

Display Method of Indoor Unit
Dual-8
Malfunction
No.
Code
Name
Display
Desynchro-
34 nizing of H7
compressor
Outdoor DC
35 fan motor L3
malfunction
power
36 L9
protection
Indoor unit
and outdoor
37 LP
unit doesnt
match
Failure start-
38 LC
up
Anti-freezing
39 protection for E2
evaporator
Cold air
40 prevention E9
protection
Malfunction of
phase current
41 detection U1
circuit for
compressor
Malfunction
of voltage
42 U3
dropping for
DC bus-bar
Malfunction
of complete
43 U5
units current
detection
The four-way
44 valve is U7
abnormal
Malfunction
of zero-cross
46 U8
detection
circuit
Malfunction
46 of detecting JF
plate(WIFI )
68
Indicator Display (during
blinking, ON 0.5s and OFF
0.5s)
Operation Cool Heating
Indicator Indicator Indicator
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.
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
During cooling and drying
operation, the compressor will
stop while indoor fan will operate;
During heating operating, the
complete unit will stop operation.
If this malfunction occurs during
heating operation, the complete unit
will stop operation.
The complete unit stops
Loads operate normally, while the unit
can't be normally controlled by APP.
A/C status
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
Not the error code. It's the status code for the
operation.
Not the error code. It's the status code for the
operation.
Replace outdoor control panel AP1
Supply voltage is unstable
Theres circuit malfunction on outdoor units
control panel AP1, please replace the outdoor
units control panel AP1.
1.Supply voltage is lower than AC175V;
2.Wiring terminal 4V is loosened or broken;
3.4V is damaged, please replace 4V.
1.Power supply is abnormal;
2.Detection circuit of indoor control mainboard is
abnormal.
1. Main board of indoor unit is damaged;
2. Detection board is damaged;
3. The connection between indoor unit and
detection board is not good;
Service Manual
Possible Causes
Installation and Maintenance