
110
4
MALFUNCTION CODES
• Unit's Malfunction Codes.
No. Malfunction
Name
Display
Code
Unit's Condition
Possible Causes
Display
Window
1
Ambient
Temperature
Sensor
Malfunction
F1
Compressor and fan
motor stop. This
button is 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
Tube
Temperature
Sensor
Malfunction
F2
Compressor and fan
motor stop. This
button is 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
Freon-lacking
protection
F0
The compressor stops;
the fan motor keeps
on running.
• Refrigerant is leaking.
• System is blocked.
5
High-
temperature
over oad
protection
H3
• Ambient operation
condition is bad.
• The evaporator and
condenser are blocked
with filth.
• The system is abnormal.
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