Gree GWH12TB-D3DNA1A - Page 76

76
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Malfunction
Name
Indoor Unit Display
Method
Outdoor Unit
Display Method
(repeated every 5
seconds)
o = O
n = Illuminated
« = Blink
A/C Status Possible Causes
Indoor
Display
Heating
Indicator
27
Decrease fre-
quency due to
high tempera-
ture resistant
during heating
operation
H0
O 3s and
blink 10 times
n o « «
All loads operate normally,
while operation frequency
for compressor is decreased.
Refer to malfunction
analysis (overload, high
temperature resistant)
28 Failure startup LC
O 3s and
blink 11 times
o « o «
During cooling and drying
operation, compressor will
stop while indoor fan will
operate. During heating
operation, the complete unit
will stop operation.
Refer to malfunction
analysis
29
Malfunction of
phase current
detection circuit
for compressor
U1
O 3s and
blink 13 times
o « n o
During cooling and drying
operation, compressor will
stop while indoor fan will
operate. During heating
operation, the complete unit
will stop operation.
Replace outdoor control
panel AP1
30
EEPROM mal-
function
EE
O 3s and
blink 15 times
o o o n
During cooling and drying
operation, compressor will
stop while indoor fan will
operate. During heating
operation, the complete unit
will stop operation.
Replace outdoor control
panel AP1
31
Charging
malfunction of
capacitor
PU
O 3s and
blink 17 times
o n o n
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 part three-
charging malfunction
analysis of capacitor
32
Malfunction of
module tem-
perature sensor
circuit
P7
O 3s and
blink 18 times
o o n «
During cooling and drying
operation, compressor will
stop while indoor fan will
operate. During heating
operation, the complete unit
will stop operation.
Replace outdoor control
panel AP1
33
Module high
temperature
protection
P8
O 3s and
blink 19 times
n o « n
During cooling and drying
operation, compressor will
stop while indoor fan will
operate. During heating
operation, the complete unit
will stop operation.
A er the complete unit is
de-energized for 20 mins,
check whether the ther-
mal grease on the IPM
Module of outdoor control
panel AP1 is su cient
and whether the radiator
is inserted tightly. If its no
use, please replace control
panel AP1
Troubleshooting 18,000/24,000 btuh Units, cont.