Gree GWH12QB-K3DNA6O

61
Installation and Maintenance
Service Manual
3
High discharge
temperature
protection of
compressor
E4
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
4
Overcurrent
protection E5
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.
Power voltage
is unstable, big
uctuation.
1. Check whether
power supply network is
abnormal;
Power voltage is too
low; overload.
2. Reduce load;
Malfunction of
hardware.
3. Replace outdoor units
main board AP1
5
Communication
malfunction E6
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 communication
malfunction)
Refer to maintenance
owchart
6
Overload
protection
E8
Flash
8 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