Gree GWH12QB-K3DNC4D - Page 70

67
Installation and Maintenance
Service Manual
25 PFC protection HC
Flash
6 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
PFC protection)
Refer to maintenance
owchart
26
Desynchronizing
of compressor
H7
Flash
7 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
27 H0
Flash
10 times
every 3s
See 9.3(diagnosis of
overheating prevention
and overload
protection)
Refer to maintenance
owchart
28 Failure startup Lc
Flash
11 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
failure startup)
Refer to maintenance
owchart
29
Circuit
malfunction of
phase current
circuit detection
for compressor
U1
Flash
13 times
every 3s
During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates. During heating
operation, all loads stop.
Hardware malfunction
of outdoor units main
board;
1. Replace outdoor
units main board AP1