ACD APD Series - Error Code Identification; Sensor Malfunction Error Codes; System Protection Error Codes

Error codes
When appliance status is abnormal, temperature indicator on the unit will blink and display corresponding
error code. Please refer to list below for identification of error code.
Display
Code
Malfunction Name
Possibles Causes
F1
1
Ambient
Temperature
Sensor Malfunction
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.
Display board is damaged.
F2
1
Tube Temperature
Sensor Malfunction
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.
Display board is damaged.
F5
1
Discharge
Temperature
Sensor Malfunction
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.
Discharge temperature sensor is damaged.
Display board is damaged.
L1
1
Humidity Sensor
Malfunction
Humidity sensor is short-circuited.
Humidity sensor is damaged.
Display board is damaged.
F0
2
Freon-lacking
protection
Refrigerant is leaking.
System is blocked.
H3
2
High-temperature
overload protection
Ambient operation condition is bad.
The evaporator and condenser are blocked with filth.
The system is abnormal.
E4
2
High discharge
temperature
protection of
compressor
Abnormal system (e.g.: blockage, etc.).
Abnormal rotation speed of the motor.
Abnormal air intake.
System is normal, but the compressor discharge temperature sensor
is abnormal or poorly contacted.
1
Unit’s Condition: Compressor and fan motor stop. The buttons are invalid.
2
Unit’s Condition: The compressor stops; the fan motor stops after 30 seconds.