Gree GWH12YD-S6DBA1A Service Manual page 40

Service Manual
Malfunction
NO.
Name
Normal
52 communica-
tion
53 Defrosting
Malfunction
of zero-cross
54
detection
circuit
PFC
55
protection
Installation and Maintenance
Display Method of Indoor Unit
Indicator Display (during
blinking, ON 0.5s and OFF
Dual-8
0.5s)
Code
Operation Cool
Display
Indicator Indicator
OFF 3S
and blink
once
(during
blinking,
ON 10s
and OFF
0.5s)
U8
HC
A/C status
Heating
Indicator
Defrosting will occur in
heating
mode. Compressor will
operate
while indoor fan will stop
operation.
The complete unit stops
During cooling and drying
operation, compressor will
stopwhile indoor fan will
operate;During heating
operation, the complete unit
will stop operation.
Possible Causes
Its the normal state
1.Power supply is abnormal;
2.Detection circuit of indoor
control mainboard is abnormal.
Replace outdoor control panel
AP1 or Reactor
37