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4
H4
Humidifying
Fault
Humidity
5
H5
Sensor Fault
6
H6
Frost failure
The
7
E9
communicat
ion on the
display
board is
faulty
temperature should be lower that the
ambient temperature. If not, that means
the shortage of refrigerant.
There is a fan for heat dissipation in the
4> Cooling Fan Fault
compressor room, the fan should work
when the compressor is on. If the fan
does not work, that means the fan is
failure or the wire is failure
Fan Fault
Check whether the fans in the cabinet work
normally
The humidity sensor is still displayed
1> Electric Board
abnormally when inserted the humidity
Fault
sensor into the electric board directly
2> Humidity Sensor
The sensor is displayed normally after
Fault
replacement
The terminal is in poor contact, after being
3> Circuit Fault
powered on again, the terminal works
normally. But after a period of time, the
error code is displayed again
Hold down the second key on the left and
1> Electric Board
the second key on the right side of the
Fault
display board for 3 seconds at the same
time. When 88 is displayed, it means that
the debugging mode is entered. The
heater's terminal of the power board
should have the same voltage output as
the input
Use a multimeter to measure the
resistance of the heater terminal, SW-
2> Heater Fault
51N is about 220 ohm, and the resistance
of SW-242N is about 130 ohm. If the
resistance is infinite, that means the
heater is broken
The power supply board has output, no
3> Circuit Fault
voltage from the casing is the circuit
problem, there is voltage but the heater
does not work, that means the problem
of terminal
1> Electric board
Connect the display board directly on the
or display board
electric board is still abnormal
fault
2> Circuit Fault
Check the wiring terminals. Reinsert the
terminals
Replace the fan or check
the cable
Change the fan or check
the circuit
Change the electric board
Change the humidity sensor
Re-connect the terminal or
re- weld the wire directly
Change the electric board
Change the heater
Re-connect the terminal or
re- weld the wire directly
Change the electric board
Check the wiring
terminals. Reinsert the
terminals
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