Gree GWH12QB-K3DNA6O

64
Installation and Maintenance
Service Manual
12
Malfunction of
outdoor ambient
temperature
sensor
F3
During cooling and drying
operation, compressor
and outdoor fan stop while
indoor fan operates. During
heating operation, all loads
stop.
1.T-SENSOR terminal
hasnt been inserted
tightly;
2. Hardware malfunction
of outdoor units main
board;
1. After de-energization,
reinsert T-SENSOR
terminal tightly;
2. Replace outdoor units
main board AP1;
13
Malfunction
of outdoor
condenser
temperature
sensor
F4
During cooling and drying
operation, compressor
and outdoor fan stop while
indoor fan operates. During
heating operation, all loads
stop.
14
Malfunction
of outdoor
discharge
temperature
sensor
F5
During cooling and drying
operation, compressor
and outdoor fan stop while
indoor fan operates. During
heating operation, all loads
stop.
15
Limit/decrease
frequency due
to overload
F6
All loads operates normally,
while operation frequency of
compressor decreases.
See 9.3(diagnosis of
overheating prevention
and overload protection)
Refer to maintenance
owchart
16
Decrease
frequency due
to overcurrent
F8
All loads operates normally,
while operation frequency of
compressor decreases.
Input power voltage is too
low;
1. Check whether
power supply network is
abnormal;
Pressure of system is too
high; overload
2. Reduce load;