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

Set multimeter to resistance gear.

Step 4

In PCB area, measure resistance of defrost temp. sensor with a multimeter.

Step 5

Take note of value.

Step 6

Measure the temperature of freezer air duct, near the defrost temp. sensor.
Use measured temperature to find the standard resistance value in Temperature-Resistance Chart for Sensor.

DIAGNOSIS 1


PROCEDURE 1


Step 1

Remove all freezer drawers.

Step 2

Remove all freezer shelves.

Step 3

Remove screw covers (total of two) on upper freezer air duct with Slotted Screw Driver.

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.

Step 8

Remove the screw cover on bottom freezer air duct with Slotted Screw Driver.

Step 9

Unscrew the screw on bottom freezer air duct with Cross-head screw driver.

Step 10

Catch bottom of air duct bottom freezer air duct and pull all buckles
(total of 10) down.

Step 11

Take out the lower air duct, tilting to one side.

CHECK AND TEST 2

Step 1

Check if terminal (B) is inserted to final position.

Step 2

Check if sensor is attached in correct position, as shown in picture.

If not, correct it.

Step 3

Check if wire of defrost sensor is broken.

If yes, replace it with a new one.

Step 4

Disconnect terminal of defrost temp. sensor (B).

Step 5

Check if the terminal is stuffed with foam.

Step 6

Measure resistance of defrost temp. sensor from terminal in freezer, and take note of it.

Step 7

Measure the temperature of defrost temp. sensor. Use measured temperature to find the standard resistance value in Temperature- Resistance Chart for Sensor.

DIAGNOSIS 2


CHECK AND TEST 3

Step 1

Put detector into one end of wires in PCB area.

Put another detector into end of wires behind air duct.

DIAGNOSIS 3


PROCEDURE 2


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.

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