Gree GWH09TB-D3DNA1A Service Manual page 58

Display Method of Indoor Unit
Malfunction
NO.
Name
Indicator Display (during blinking,
Dual-8
ON 0.5s and OFF 0.5s)
Code
Operation
Display
Indicator
EEPROM
30 EE
malfunction
Charging
31 malfunction PU
of capacitor
Malfunction
of module
32 P7
temperature
sensor circuit
Module high
33 temperature P8
protection
Malfunction
of voltage
34 U3
dropping for
DC bus-bar
Voltage of
35 DC bus-bar PL
is too low
Limit/
decrease
frequency
36 EU
due to high
temperature
of module
The four-way
37 valve is U7
abnormal
Zero-
crossing
38 malfunction U9
of outdoor
unit
Limit/
decrease
39 frequency FH
due to
antifreezing
Display Method of
Outdoor Unit
(Indicator has 3 kinds
of display status and
they will be displayed
circularly every 5s.)
□OFF
■Illuminated
Cool Heating
D5 D6
Indicator Indicator
(D40) (D41)
OFF 3S
and blink
15 times
OFF 3S
and blink
17 times
OFF 3S
and blink
18 times
OFF 3S
and blink
19 times
OFF 3S
and blink
20 times
OFF 3S
and blink
21 times
A/C status
Blink
D16 D30
(D42) (D43)
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
During cooling operation,
compressor will stop while
indoor fan will operate; During
heating operation, the complete
unit will stop
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
All loads operate normally, while
operation frequency for
compressor is decreased
If this malfunction occurs during
heating operation, the complete
unit will stop operation.
During cooling operation,
compressor will stop while
indoor fan will operate; during
heating,the complete unit will
stop operation.
All loads operate normally, while
operation frequency for
compressor is decreased
Possible Causes
Replace outdoor control panel
AP1
Refer to the part three—charging
malfunction analysis of capacitor
Replace outdoor control panel
AP1
After the complete unit is de-
energized for 20mins, check
whether the thermal grease on
IPM Module of outdoor control
whether the radiator is inserted
tightly. If its no use, please replace
control panel AP1.
Supply voltage is unstable
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)
Discharging after the complete
unit is de-energized for 20mins,
check whether the thermal grease
on
IPM Module of outdoor control
whether the radiator is inserted
tightly.
If its no use, please replace control
panel AP1.
1.Supply voltage is lower than
AC175V;
2.Wiring terminal 4V is loosened
or broken;
3.4V is damaged, please replace
4V.
Replace outdoor control panel
AP1
Poor air-return in indoor unit or fan
speed is too low