CHEXCK AND TEST 1
Step 1
Unscrew cover of mainboard with cross-head screwdriver.
Step 2
Power on the appliance, and heat freezer temp. sensor.
Step 3
Use multimeter to test the voltage of output for fan.
Take note of the test result.
DIAGNOSIS 1
CHECK AND TEST 2
Step 1
Open fridge door and heat fridge temp. sensor.
Step 2
Press down fridge mechanical switch
Step 3
Attach detecting hook to wires after stripping sleeves, use an oscilloscope to measure signal for damper between “A+” & “B+” or “A-” & “B-”
Step 4
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
CHECK AND TEST 3
Step 1
Power on the appliance, open fridge door, and press down fridge mechanical switch.
Step 2
Put your hand near outlet
of fridge air duct to feel if there is cooling air
blowing out.
DIAGNOSIS 3
