Service Manual
Maintenance
30
9.4 Error Code
No.
Malfunction Name
DisplayCode
Unit status
Possible Causes
Display
Window
1
Ambient Temperature
Sensor Malfunction
F1
Compressorand fanmotor
stop. Buttons are invalid.
●
Ambient temperature sensor is loosen or is poorly
connected with the terminal of display board.
●
Some element of display board may have been put
upside down and cause short circuit.
●
Ambient temperature sensor is damaged(Please refer to
Checking Table for Temperature Sensor Resistance).
●
Display board is damaged.
2
TubeTemperature
Sensor Malfunction
F2
Compressorand fanmotor
stop. Buttons are invalid.
●
Temperature sensor on the evaporator is loosen or is
poorly connected with the terminal of display board.
●
Some element of display board may have been put
upside down and cause short circuit.
●
Temperature sensor on the evaporator is damaged
(Please refer to Checking Table for Temperature Sensor
Resistance).
●
Display board is damaged.
3
Humidity Sensor
Malfunction
L1
●
Humidity sensor is short-circuited.
●
Humidity sensor is damaged.
●
Display board is damaged.
4
Insufficient Refrigerant
protection
F0
The compressor stops.
●
Refrigerant is leaking.
●
System is blocked.
5
High-temperature overoad
protection
H3
●
Ambient operation condition is bad.
●
The evaporator and condenser are blocked with filth.
●
The system is abnormal.
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