PROCEDURE 1

Step 1

Unscrew the screw of fridge air duct.


Step 2

Remove the LED lamp cover and the screw.

Step 3

Remove the air duct.

Step 4

Unplug the electrical wires.

Step 5

Disconnect the terminal of potentiometer.

Step 6

Remove the UI film.

Step 7

Remove PCB box from air duct.
a) Use 2 mm slot screw driver to create a gap in front side.

b) Insert a steel ruler to even the gap.

c) Pull the PCB box out.

Step 8

Disassemble PCB box.
a）Prize off the buckle;
b) Remove the cover;

c) Disconnect the terminals;
d) Unscrew and remove the PCB;

CHECK AND TEST 1

Step 1

Reconnect the main control board to the cable.

Step 2

Reconnect the electrical wires.

Step 3

Heat fridge temp. sensor.

Step 4

Press LED switch and hold on, then press the
button on mainboard for 3 seconds to start
manual defrost.

Please keep all terminals connected with
mainboard, otherwise, mainboard cannot
output power to heater.

Step 5

Test voltage of terminals for defrost heater.

Step 6

Take note of the result.
Later power off to quit manual defrost.


The value should be
230V or 115V.

DIAGNOSIS 1

PROCEDURE 2


CHECK AND TEST 2

Step 1

Reconnect the main control board to the cable.

Step 2

Reconnect the electrical wires.

Step 3

Heat fridge temp. sensor.

Step 4

Press LED switch and hold on, then press the
button on mainboard for 3 seconds to start
manual defrost.


Please keep all terminals connected with
mainboard, otherwise, mainboard cannot
output power to heater.

Step 5

Test voltage of terminals for defrost heater.

Step 6

Take note of the result.
Later power off to quit manual defrost.


The value should be 230V or 115V.

DIAGNOSIS 2


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