LG LTCS20020 Series Service Manual page 46

2) TEST MODE and Removing TPA
1. How to make TEST MODE
If you push the test button on the Main PCB, the refrigerator will be enter the TEST MODE
Main PCB
2. How to remove Terminal Position Assurance (TPA)
<AC TPA>
<DC TPA>
* After measure the values, you should put in the TPA again
* 1 time : Comp ON /F-fan ON /
Defrost Heater OFF/
Display ALL ON
* 2 times : Comp OFF/F-fan OFF/
Defrost Heater ON
("2" displayed)
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All LED turn on
TEST MODE 2