Gree GUHN48NM3A1O - Wiring Diagrams

91
U-MATCH Air
Conditioners
Service Manual
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Malfunction display: E9 Full Water Protection
Full Water Protection
Y
N
Check if water overflow
Check if the water drainage pump
works
N
Y
Y
Y
Check if the water drainage pipe is jammed
or if water flows smoothly
N
Adjust the water
drainage pipe
Clear the water drainage pipe
Check if the voltage of liquid level
switch end is ok
Replace the main board
of the indoor uint
N
Y
Check the liquid level
switch
Check if the voltage of water
drainage pump end is ok
Check the cables of
water drainge pump
Replace the main board of
the indoor uint
N
Y
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Malfunction display: F0 Failure of Indoor Room Sensor at Air Intake
Check if the plug of the temperature sensor is correctly
connected with socket on the mainboard
Failure of indoor room sensor
at air intake
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