16
Maintenance
Service Manual
No.
Malfunction
Name
Nixie tube display
Unit status
Possible Causes
1
Malfunction of
ambient temp.
sensor
F1
The compressor, fan
and water pump stop;
buttons are invalid
1. The wiring terminal between ambient temperature
sensor and main board is loosened or poorly
contacted;
2. There’s short circuit due to trip-over of the parts on
controller;
3. Ambient temperature sensor is damaged (Please
check it by referring to the resistance table for
temperature sensor);
4. Main board is broken.
2
Malfunction
of tube temp.
sensor
F2
1. The wiring terminal between evaporator temperature
sensor and main board is loosened or poorly
contacted;
2. There’s short circuit due to the trip-over of the parts
on controller;
3. Evaporator temperature sensor is damaged
(Please check it by referring to the resistance table for
temperature sensor);
4. Main board is broken.
3
Malfunction
of humidity
sensor
L1
1. Humidity sensor is short-circuit;
2. Humidity sensor is broken;
3. Display board is broken.
4
Freon-lacking
protection
F0
The compressor
stops;the fan motor
keeps onrunning.
1.Refrigerant is leaking.
2.System is blocked.
5
Overload
protection
H3
1.Ambient operation condition is bad.
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3.The system is abnormal.
8.Maintenance
8.1 Error code
