Gree GWC18KG-K3DNA6A

7URXEOHVKRRWLQJ
Display Method of Indoor Unit
Indicator Display (during blinking,
ON 0.5s and OFF 0.5s)
Display Method o
f
Outdoor Unit
Indicator has 3 kinds o
f
display status and they
will be displayed
circularly every 5s.
ƑOFF ŶON ƿBlink
No.
Malfunction
Name
Dual-8
Code
Display
Operation
Indicator
COOL
Indicator
Heating
Indicator
D40 D41 D42 D43
A/C status
Possible Reasons
33
Malfunction o
f
module
temperature
sensor circuit
P7
OFF 3S
and blink
18 times
ƑƑŶƿ
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
34
Module high
temperature
protection
P8
OFF 3S
and blink
19 times
ŶƑƿ Ŷ
During cooling operation,
compressor will stop while indoo
r
fan will operate; During heating
operation, the complete unit will
stop
After the complete unit is de-energized for 20mins,
check whether the thermal grease on IPM Module
of outdoor control panel AP1 is sufficient and
whether the radiator is inserted tightly. If it’s no use,
please replace control panel AP1.
35
Malfunction o
f
voltage
dropping fo
r
DC bus-bar
U3
OFF 3S
and blink
20 times
ƑŶŶŶ
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
36
Voltage of DC
bus-bar is too
low
PL
OFF 3S
and blink
21 times
ƑŶŶƑ
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
1. Measure the voltage of position L and N on wiring
board (XT), if the voltage is higher than 150VAC,
turn on the unit after the supply voltage is increased
to the normal range.
2.If the AC input is normal, measure the voltage of
electrolytic capacitor C on control panel (AP1), if it’s
normal, there’s malfunction for the circuit, please
replace the control panel (AP1)
37
Limit/decrease
frequency due to
high
temperature o
f
module
EU ŶŶŶƿ
A
ll loads operate normally, while
operation frequency fo
r
compressor is decreased
Discharging after the complete unit is de-energized
for 20mins, check whether the thermal grease on
IPM Module of outdoor control panel AP1 is
sufficient and whether the radiator is inserted tightly.
If it’s no use, please replace control panel AP1.
38
The four-way
valve is
abnormal
U7 ŶƑƿ Ƒ
If this malfunction occurs during
heating operation, the complete
unit will stop operation.
1.Supply voltage is lower than AC175V;
2.Wiring terminal 4V is loosened or broken;
3.4V is damaged, please replace 4V.
39
Zero- crossing
malfunction o
f
outdoor unit
U9 ŶŶƿ Ƒ
During cooling operation,
compressor will stop while indoo
r
fan will operate; during heating,
the complete unit will stop
operation.
Replace outdoor control panel AP1
40
Limit/decrease
frequency due to
antifreezing
FH ŶŶŶƑ
A
ll loads operate normally, while
operation frequency fo
r
compressor is decreased
Poor air-return in indoor unit or fan speed is too low
61