Gree GWHD24NK3EO - Malfunction Display: E9 Full Water Protection; Malfunction Display: F2 Failure of Evaporator Temp. Sensor

Troubleshooting
80
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Malfunction display: E9 Full Water Protection
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Malfunction display: F2 Failure of Evaporator Temp. Sensor
Y
N
N
Y
Y
Y
N
N
Y
N
Y
Full Water Protection
Check if water overflow
Check if the voltage of liquid
level switch end is ok
Replace the main board of
the indoor uint
Check the liquid level
switch
Replace the main board of
the indoor uint
Check the cables of water
drainge pump
Check if the water drainage
pump works
Check if the water drainage pipe is
jammed or if water flows smoothly
Clear the water drainage pipe
Adjust the water
drainage pipe
Check if the voltage of water
drainage pump end is ok
Check if the plug of the temperature sensor is correctly
connected with socket on the mainboard
Failure of condenser Temp sensor
N
Remove the sensor to check if the resistance value is ok
N
Y
Y
Y
Replace mainboard of the indoor uint
Check the direction of the plug and
socket
Replace temperature sensor