Gree GWC18KG-K3DNA5A, Service Manual

Page: 63 / 101

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Display Method of Indoor Unit
Indicator Display (during blinking,
ON 0.5s and OFF 0.5s)
Display Method of
Outdoor Unit
Indicator has 3 kinds of
display status and they
will be displayed
circularly every 5s.
Ƒ
OFF
Ŷ
ON
ƿ
Blink
No.
Malfunction
Name
Dual-8
Code
Display
Operation
Indicator
COOL
Indicator
Heating
Indicator
D40 D41 D42 D43
A/C status
Possible Reasons
23
Overload
protection for
compressor
H3
OFF 3S
and blink
3 times
Ƒ ƿ ƿ Ƒ
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop operation.
1. Wiring terminal OVC-COMP is loosened. In
normal state, the resistance for this terminal should
be less than 1ohm.
2.Refer to the malfunction analysis ( discharge
protection, overload)
24
System is
abnormal
H4
OFF 3S
and blink
4 times
Ŷ Ƒ Ŷ Ŷ
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 (overload, high
temperature resistant)
25 IPM protection H5
OFF 3S
and blink
5 times
Ƒ ƿ Ƒ Ŷ
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.
26 PFC protection HC
OFF 3S
and blink
6 times
Ƒ Ŷ ƿ ƿ
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
27
Desynchronizing
of compressor
H7
OFF 3S
and blink
7 times
Ƒ ƿ Ŷ ƿ
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.
28
Decrease
frequency due to
high
temperature
resistant during
heating
operation
H0
OFF 3S
and blink
10 times
Ŷ Ƒ ƿ ƿ
All loads operate normally, while
operation frequency for
compressor is decreased
Refer to the malfunction analysis (overload, high
temperature resistant)
29 Failure start-up Lc
OFF 3S
and blink
11 times
Ƒ ƿ Ƒ ƿ
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
30
Malfunction of
phase current
detection circuit
for compressor
U1
OFF 3S
and blink
13 times
Ƒ ƿ Ŷ Ƒ
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
31
EEPROM
malfunction
EE
OFF 3S
and blink
15 times
Ƒ Ƒ Ƒ Ŷ
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
32
Charging
malfunction of
capacitor
PU
OFF 3S
and blink
17 times
Ƒ Ŷ Ƒ Ŷ
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
Refer to the part three—charging malfunction
analysis of capacitor
60