Gree GWH12TB-D3DNA1A - Page 75

75
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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
20 Defrosting H1 O 3S and
blink once
Defrosting will occur in
heating mode. Compressor
will operate while indoor fan
will stop operation
It’s the normal state
21 Static dedusting
protection
H2 O 3S and
blink twice
22 Overload
protection for
compressor
H3 O 3s and
blink 3 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.
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 analy-
sis (discharge protection,
overload)
23 System is abnor-
mal
H4 O 3s and
blink 4 times
n o n 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 malfunction
analysis (IPM protec-
tion, loss of synchronism
protection and overcurrent
protection of phase current
for compressor.
24 IPM protection H5 O 3s and
blink 5 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.
Refer to the malfunction
analysis (IPM protec-
tion, loss of synchronism
protection and overcurrent
protection of phase current
for compressor.
25 PFC protection HC O 3s and
blink 6 times
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 malfunction
analysis
26 Desynchroniz-
ing of compres-
sor
H7 O 3s and
blink 7 times
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 malfunction
analysis (IPM protec-
tion, loss of synchronism
protection and overcurrent
protection of phase current
for compressor.
Troubleshooting 18,000/24,000 btuh Units, cont.