Gree GWH12MB-K3DNE3G Service Manual page 38

Service Manual
Display Method of Indoor Unit
Malfunction
Dual-8
NO.
Name
Code
Display
System is
34 E8
abnormal
IPM
35 H5
protection
Module
36 temperature H5
is too high
Internal motor
37 (fan motor) do H6
not operate
Desynchro-
38 nizing of H7
compressor
PFC
39 HC
protection
Outdoor DC
40 fan motor L3
malfunction
power
41 L9
protection
Indoor unit
and outdoor
42 LP
unit doesn't
match
Failure start-
43 LC
up
Installation and Maintenance
Display Method of Outdoor
Indicator has 3 kinds of
Indicator Display (during
display status and during
blinking, ON 0.5s and OFF
blinking, ON 0.5s and OFF
0.5s)
0.5s
Operation Cool Heating Yellow
Indicator Indicator Indicator Indicator
OFF 1S
and blink
6 times
OFF 1S
and blink
4 times
OFF 1S
and blink
10 times
OFF 1S
and blink
14 times
OFF 1S
and blink
9 times
OFF 1S
and blink
16 times
Unit
A/C status
Red Green
Indicator Indicator
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.
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.
OFF 1S
Outdoor DC fan motor
and
malfunction lead to compressor
blink
stop operation,
14 times
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.
Possible Causes
Refer to the malfunction analysis
(overload, high temperature
resistant)
Refer to the malfunction
analysis (IPM protection, loss
of synchronism protection and
overcurrent protection of phase
current for compressor.
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.
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 doesn't
match
Refer to the malfunction analysis
35