CHECK AND TEST 1

Step 1

Unscrew cover of mainboard with a Cross-head screwdriver. 

Step 2

Heat freezer temp. sensor.

Step 3

Use multimeter to test the voltage of output for “BCK” & “GND”. 

Step 4

Take note of test result.

DIAGNOSIS 1


CHECK AND TEST 2

Step 1

Press the button SW1 on mainboard, within 1 minute after powering on the appliance, to start manual defrost. 

Step 2

Test voltage of terminals for defrost heater. 

Step 3

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

The value should be 230V or 115V. 

DIAGNOSIS 2


PROCEDURE 1

Step 1

Unscrew the mainboard..

Step 2

Pull out the buckle to take out wires. 

Step 3

Disconnect terminals. 

Step 4

Pull out the buckle to remove mainboard.

PROCEDURE 2

DIAGNOSIS 3