CHECK AND TEST 1

Step 1

Unscrew cover of mainboard with a Cross-head screwdriver.

Step 2

Heat freezer temp. sensor.

Step 3

Open the fridge and freezer door on same side to same degree.

Step 4

Use multimeter to measure the voltage output of PCB for “FAN+”&”GND”.

Step 5

Take note of test result.

Note


DIAGNOSIS 1

CHECK AND TEST 2

Step 1

Heat fridge temp. sensor.

Step 2

Heat freezer temp. sensor.

Step 3

Power on the appliance and observe the signal for 5 seconds after opening or closing the door.

Note

Please open or close only one door.

Step 4

Attach detecting hook to wires after stripping sleeves, use an oscilloscope to measure signal for damper between “A+” & “B+” or “A-” & “B-”

Note


Step 5

Power on the appliance and observe the signal for five seconds after opening or closing the door. Check to see if there is a square waveform output.

DIAGNOSIS 2

PROCEDURE 1

Step 1

Disconnect terminals.

Step 2

Pull out earthing wires.

Step 3

Unscrew the mainboard.

Step 4

Pull out the buckle to remove the mainboard.

PROCEDURE 2

DIAGNOSIS 3

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