LG LSSB2791ST Service Manual page 47

TROUBLESHOOTING
3. Troubleshooting Without Error Display
16) Water mode doesn't work
No
1 Check the loose connection.
2 Check the Red to Blue.
(While pushing the lever S/W)
Check the Pin25 to Pin26 of CON7.
3
(While pushing the lever S/W)
4 Check the resistance value.
Checking flow
CON 3
(1) (2)
Result & SVC Action
Lever s/w
Pushing
Not pushing
Lever s/w
Pushing
Not pushing
Point
1500~1700Ω
(1) to (2)
47
Result
SVC Action
100~127V Go to the 3
Other Change PCB
0~2V Go to the 3
Other Change PCB
Result
SVC Action
4.5~5V Go to the 4
Other Change PCB
0~2V Go to the 4
Other Change PCB
Result
SVC Action
Explain
Replace Water
Other
valve