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
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