Gree GWH12QB-K3DNA6O

66
Installation and Maintenance
Service Manual
20
Overcurrent
protection of
phase current
P5
During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates. During heating
operation, all loads stop.
See 9.3 (diagnosis
of IPM protection,
desynchronizing
malfunction, overcurrent
protection of phase
current of compressor)
Refer to maintenance
owchart
21 Defrosting
Flash
once
every 3s
Normal function
22
Overload
protection of
compressor
H3
Flash
3 times
every 3s
During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates. During heating
operation, all loads stop.
1:Wiring terminal OVC-
COMP is loose (Under
normal circumstances,
the resistance between
both ends of this terminal
should be less than 1Ω.)
1. After de-energization,
insert OVC-COMP
terminal tightly;
2: See 9.3 (diagnosis of
overload and discharge
protection)
2. Refer to maintenance
owchart
23
System is
abnormal
H4
Flash
4 times
every 3s
During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates. During heating
operation, all loads stop.
See 9.3(diagnosis of
overheating prevention
and overload protection)
Refer to maintenance
owchart
24 IPM protection H5
Flash
5 times
every 3s
During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates. During heating
operation, all loads stop.
See 9.3 (diagnosis
of IPM protection,
desynchronizing
malfunction, overcurrent
protection of phase
current of compressor)
Refer to maintenance
owchart