LG LSC27914ST Owner's Manual - Page 116

Door open alarm never stops

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21) Door open alarm never stops NO. CHECKING FLOW Open refrigerator door, then, check manually the door S/W movement. 1 Remove cover hinge in refrigerator door, check the measurement in Door S/W DC part as is shown in the picture. 2 RESULT & SERVICE ACTION Result Tight movement Service Action Replace Door S/W Free movement Go to Step 2 Result Pressed 5 Vdc Other Released 0 Vdc Other Service Action Check in released mode Replace PCB Go to Step 3 Replace PCB Open freezer door, then, check manually the door S/W movement. 3 Remove cover hinge in freezer door, check the measurement in Door S/W DC part as is shown in the picture. 4 Result Tight movement Free movement Service Action Replace Door S/W Go to Step 4 Result Pressed 5 Vdc Other Released 0 Vdc Other Service Action Check in released mode Replace PCB Go to Step 6 Replace PCB If problem persist, disconnect from Main PCB CON 6 and CON 7, then, disconnect from both door S/W. Proceed to check resistance value in the mentioned 5 measurement points. Check the result. Else, explain to customer. Result R-Door S/W connector 0Ù OFF F-Door S/W connector 0Ù OFF Service Action Replace product Replace PCB Replace product Replace PCB - 115 -

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21) Door open alarm never stops
CHECKING FLOW
RESULT & SERVICE ACTION
Open refrigerator door, then, check manually the
door S/W movement.
1
2
NO.
5
4
3
Remove cover hinge in refrigerator door, check the
measurement in Door S/W DC part as is shown in
the picture.
Open freezer door, then, check manually the door
S/W movement.
If problem persist, disconnect from Main PCB CON 6
and CON 7, then, disconnect from both door S/W.
Proceed to check resistance value in the mentioned
measurement points.
Check the result.
Else, explain to customer.
Result
Service Action
Replace Door S/W
Tight movement
Free movement
Go to Step 2
Result
Service Action
Released
Check in released mode
5 Vdc
Other
Replace PCB
Pressed
Go to Step 3
0 Vdc
Other
Replace PCB
Result
Service Action
Replace Door S/W
Tight movement
Free movement
Go to Step 4
Remove cover hinge in freezer door, check the
measurement in Door S/W DC part as is shown in
the picture.
Result
Service Action
Released
Check in released mode
5 Vdc
Other
Replace PCB
Pressed
Go to Step 6
0 Vdc
Other
Replace PCB
Result
Service Action
F-Door
S/W
connector
Replace product
0
Ù
OFF
Replace PCB
R-Door
S/W
connector
Replace product
Replace PCB
0
Ù
OFF
- 115 -