Gree GPH12AF-K3NNA7A

32
Maintenance
Service Manual
9. Maintenance
9.1 Error Code
No. Malfunction Name
Display Method of Indoor Unit
A/C Status Possible Causes
Error Code
Indicator lamp
(During blinking, ON for 0.5S and
OFF for 0.5 S)
Operation
Lamp
COOL
Lamp
HEAT
Lamp
1
Indoor ambient
temperature sensor
is open/short-
circuited
F1
OFF 3S
and blinks
once
The unit will stop
operation as it reaches
the temperature point.
During cooling and
drying operation,
except indoor fan
operates, other loads
(such as compressor,
outdoor fan, 4-way
valve) stop operation;
During heating
operation, the complete
unit stops operation.
1. The wiring terminal
between indoor ambient
temperature sensor and
controller is loosened or
poorly contacted;
2. There’s short circuit due
to trip-over of the parts on
controller;
3. Indoor ambient
temperature sensor
is damaged (Please
check it by referring to
the resistance table for
temperature sensor)
4. Main board is broken.
2
Indoor evaporator
temperature sensor
is open/short-
circuited
F2
OFF 3S
and blinks
twice
The unit will stop
operation as it reaches
the temperature point.
During cooling and
drying operation,
except indoor fan
operates, other loads
stop operation; During
heating operation, the
complete unit stops
operation.
1. The wiring terminal
between indoor evaporator
temperature sensor and
controller is loosened or
poorly contacted;
2. There’s short circuit due
to the trip-over of the parts
on controller;
3. Indoor evaporator
temperature sensor
is damaged (Please
check it by referring to
the resistance table for
temperature sensor)
4. Main board is broken.
3
Outdoor condenser
temperature sensor
is open/short-
circuited
F4
OFF 3S
and blinks
4 times
The unit will stop
operation as it reaches
the temperature point.
During cooling and
drying operation,
compressor stops and
indoor fan operates;
During heating
operation, the complete
unit stops operation.
1. The wiring terminal
between outdoor condenser
temperature sensor and
controller is loosened or
poorly contacted;
2. There’s short circuit due
to the trip-over of the parts
on controller;
3. Outdoor condenser
temperature sensor
is damaged (Please
check it by referring to
the resistance table for
temperature sensor)
4. Main board is broken.