COMPONENT:

DAMPER

Note


PROCEDURE 1


Step 1

Remove shelves.


Step 2

Remove crispers.


Step 3

Remove shelf cover.


Step 4

Hold the cover and turn in counter-clockwise direction to loosen cover. Then, remove cover.


Step 5

Use 6mm Cross-head screwdriver to loosen the screw.


Step 6

Hold the edge of air duct to remove.


Step 7

Disconnect the terminal for fridge temp. sensor.


CHECK AND TEST 1

Step 1

Connect damper terminal to terminals inside fridge.


Step 2

Unscrew cover of mainboard with a cross- head screwdriver.


Step 3

Offer signal to dampers from terminal in PCB area (between “A+” & “B+” or “A-” & “B-”).


Step 4

An oscilloscope should display a square wave signal.


Step 5

See if door of damper opens gradually.


DIAGNOSIS 1


PROCEDURE 2


Step 1

Unscrew with 6mm Cross-head driver.


Step 2

Remove plastic cover of damper.


Step 3

Lift damper out of air duct in foam.


CHECK AND TEST 2

Step 1

Use a standard signal producer to supply square wave to damper from terminal in fridge area.


DIAGNOSIS 2


CHECK AND TEST 3

Step 1

In duct area, check if terminal is pushed into final position.


Step 2

Check if terminal is filled with foam or not.

IF YES, please use tweezers to clean and
remove the foam.


Step 3

Check to ensure that wires are in proper order.

IF WIRE ORDER IS WRONG, PLEASE FOLLOW PROCEDURE 3 TO CORRECT THEM.



Step 4

Check to make sure wire order in the foam is right and/or see if it’s been cut off.


Step 5

Use multimeter to test connections.

1.Put detector into one end of wires in PCB area;
2. Put another detector into end of wires behind air duct.


DIAGNOSIS 3


DIAGNOSIS 4


Note


PROCEDURE 3


Step 1

Cut wire off.

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 4

Step 1

Connect damper terminal to terminals inside fridge.


Step 2

Offer signal to dampers from terminal in PCB area (between “A+” & “B+” or “A-” & “B-”).


Step 3

An oscilloscope should display a square wave signal.


Step 4

See if door of damper opens gradually.


DIAGNOSIS 5


PROCEDURE 4


Step 1

Put damper into air duct in foam.


Step 2

Put the plastic cover on top of damper.


Step 3

Connect the terminal.


Step 4

Screw with 6mm cross-head screwdriver.


PROCEDURE 5


Step 1

Re-connect the terminals.


Step 2

Hold air duct by edges to put it back in place.


Step 3

Use a 6 mm cross-head screwdriver to tighten the screw clockwise.


Step 4

Hold the cover and turn
it clockwise to tighten the
lid, then pull outwards.


Step 5

Insert shelves.


TIPS DURING INSTALLATION PROCEDURES FOR FRIDGE AIR DUCT.

Tip 1

Connect the terminals.

Tip 2

Push terminals into place, then move wires to prevent crushing of wires with edge of air duct.


Tip 3

When reinstalling the air duct, first insert positive shaft into the negative hole.


Tip 4

Then, fasten the clasp on top using the same method.


DIAGNOSIS 6

Step 1

Power on the appliance, then open the door and press the mechanical switch pin, put your hand in front of fridge air duct outlet to verify.


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