Gree GWH18RC-K3DNA2C, Service Manual

Page: 47 / 108

44
Installation and Maintenance
Service Manual
23
EEPROM
malfunction
EE
OFF 3S
and blink
15 times
ƶ ƶ ƶ Ƶ
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
24
Charging
malfunction of
capacitor
PU
OFF 3S
and blink
17 times
ƶ Ƶ ƶ Ƶ
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
25
Malfunction of
module
temperature
sensor circuit
P7
OFF 3S
and blink
18 times
ƶ ƶ Ƶ ƿ
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
26
Module high
temperature
protection
P8
OFF 3S
and blink
19 times
Ƶ ƶ ƿ Ƶ
During cooling operation,
compressor will stop while
indoor 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
LVVXI¿FLHQWDQGZKHWKHU
the radiator is inserted
tightly. If its no use, please
replace control panel AP1.
27
Malfunction of
voltage
dropping for
DC bus-bar
U3
OFF 3S
and blink
20 times
ƶ Ƶ Ƶ Ƶ
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
28
Voltage of DC
bus-bar is too
low
PL
OFF 3S
and blink
21 times
ƶ Ƶ Ƶ ƶ
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 its
normal, theres malfunction
for the circuit, please
replace the control panel
(AP1)
29
DC generatrix
voltage
is too high
PH
Off 3s
blink
11times
ƶ Ƶ ƶ ƿ
Cooling,dehumidifying,com
pressor stop running
fanmotor works.Heating:all
will stop 1.Testing wire terminal
Land N positionIf higher
than 265VAC,please cut
off
t h e p o w e r s u p p l y a n d
restart
until back to normal 2. If
input voltage is normal,
testingthe voltage of
electrolytic capacitoron
AP1
after turn on the unit.There
may be some problem
andreplace the AP1 if the
e l e c t r o l y t i c c a p a c i t o r
voltage
range at 200-280V
30
Compressor
current
overurrent
protection
P5
Off
3sblink
15time
ƶ ƿ ƶ ƶ
Cooling,
dehumidifying;compressor
stops running,indoor fan
motor works.Heating: all will
stoprunning Please refer to
troubleshooting(IPM
protection, compressor
lose
steps, compressor current
overcurrent protection)