CHECK AND TEST 1
Step 1
Unscrew cover of mainboard with a Cross-head screwdriver.
Step 2
In mainboard area, check
if terminal is inserted to
final position.
If not, please reinsert into correct final position.
Step 3
Power on the appliance, open fridge door, and heat fridge temp. sensor.
Step 4
Press down fridge mechanical switch.
Step 5
Put your hand near outlet of fridge air duct to check if damper is working normally or not.
DIAGNOSIS 1
PROCEDURE 1
Step 1
Remove all freezer drawers.
Step 2
Remove all freezer shelves.
Step 4
Unscrew screws (total
of two) on upper freezer
air duct with Cross-head
screw driver.
Step 5
Catch bottom of air duct upper freezer air duct and pull all buckles (total of 8) down.
Step 6
Take out upper freezer
air duct by tilting to one
side.
Pay attention to the
connectors when pulling
out the air duct.
Step 7
Disconnect the terminal for fan motor and move upper freezer air duct away.
CHECK AND TEST 2
Step 1
Check if terminal is inserted to final position.
If not, reinsert it.
Step 2
Check if terminal is filled with foam or not.
If yes, use tweezer to clean and remove the foam.
Step 3
Check if wires of damper are broken or not.
Step 4
Check if wire order is correct or not.
Pictures on right side shown correct wire order.
DIAGNOSIS 2
PROCEDURE 2
Step 1
Cut the wire.
Step 2
Peel off the sleeves.
Step 3
Check to ensure proper wire order and reconnect them.
Step 4
Tin soldering.
Step 5
Cover connecting point with electrical tape.
CHECK AND TEST 3
Step 1
Disconnect terminal of damper.
Step 2
Observing with an oscilloscope, the signal will be a square wave.
Watch to see if door of damper opens gradually.
Step 3
Offer signal to dampers.
DIAGNOSIS 3
CHECK AND TEST 4
Step 1
Set multimeter to resistance gear.
Step 2
Check if wire connections in foam are correct or not.
DIAGNOSIS 4
PROCEDURE 3
Tip 1
When restoring the upper freezer air duct, fasten the wires to avoid crushing them with air duct.
Tip 2
All buckles should be pushed into proper final position. If not, please repeat installation.
CHECK AND TEST 5
Step 1
Power on the appliance, open fridge door, and heat fridge temp. sensor.
Step 2
Press down fridge mechanical switch.
Step 3
Put your hand near outlet of fridge air duct to check if damper is working normally or not.
DIAGNOSIS 5
GO BACK TO COMPONENT LIST