Gree Multi+ Ultra MULTIU18HP230V1DO Service & Parts Manual page 37

Service Manual
Malfunction display: F3 Failure of Outdoor Ambient Sensor
Check if the plug of the temperature sensor is correctly
connected with socket on the mainboard
Remove the sensor to check if the resistance value is ok
Malfunction display: F5 Failure of Exhaust Temp. Sensor
Check if the plug of the temperature sensor is correctly
connected with socket on the mainboard
Remove the sensor to check if the resistance value is ok
Installation and Maintenance
Failure of outdoor Ambient sensor
Y
Y
Y
Replace mainboard of the indoor uint
Failure of Exhaust Temp. sensor
Y
Y
Y
Replace mainboard of the indoor uint
Check the direction of the plug
N
and socket
N
Replace temperature sensor
N
Check the direction of the plug
and socket
N
Replace temperature sensor
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