Gree GWH12UB-K3DNA4F Service Manual page 56

Service Manual
Malfunction
Dual-8
NO.
Name
Code
Display
System is
34 H4
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 Indoor Unit
Indicator Display (during
blinking, ON 0.5s and OFF
0.5s)
Operation Cool Heating
Indicator Indicator Indicator
Display Method of Outdoor
Unit
Indicator has 3 kinds of
display status and during
blinking, ON 0.5s and OFF
0.5s
Yellow Red Green
Indicator Indicator Indicator
During cooling and drying
operation, compressor will stop
OFF 1S
while indoor fan will operate;
and blink
During heating operation, the
6 times
complete unit will stop
operation.
During cooling and drying
operation, compressor will stop
OFF 1S
while indoor fan will operate;
and blink
During heating operation, the
4 times
complete unit will stop
operation.
OFF 1S
and blink
10 times
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
OFF 1S
while indoor fan will operate;
and blink
During heating operation, the
14 times
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
OFF 1S Outdoor fan motor will stop
and blink 30s latter , 3 minutes latter
9 times fan motor and compressor will
restart
OFF 1S
compressor and Outdoor fan
and blink
motor can't work
16 times
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
operation.
A/C status 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
53