LG LFX28968SW Service Manual - Page 35

PCB While pushing the Water Button

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9-3 Water mode doesn't work No Checking flow 1 Check the loose connection on the Dispenser PCB 2 Check the Purple to White on the Dispenser PCB (While pushing the Water Button) 3 Check the Blue to Gray on the Dispenser PCB (While pushing the Water Button) Result & SVC Action Water Button Result 112 ~ 115 V Pushing Other Not pushing 0 ~2 V Other SVC Action Go to the 3 Dispenser PCB Go to the 3 Dispenser PCB Water Button Result 112 ~ 115 V Pushing Other Not pushing 0 ~2 V Other SVC Action Go to the 4 Dispenser PCB Go to the 4 Dispenser PCB 4 Check the resistance value. (1) (2) (3) (4) Point (1) to (2) Result 360 ~ 420Ω Other (3) to (4) 360 ~ 420Ω Other SVC Action Explain Replace Pilot Valve Explain Replace Water Valve Machine Room Dispenser Ice Maker In door - 35 -

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- 35 -
<CON2>
9-3
Water mode doesn’t work
No
1
2
Checking flow
Check the loose connection on the
Dispenser PCB
Check the Purple to White on the Dispenser
PCB
(While pushing the Water Button)
Result & SVC Action
Pushing
Not
pushing
112 ~ 115 V
Other
0 ~2 V
Other
Go to the 3
Dispenser PCB
Go to the 3
Dispenser PCB
Water Button
Result
SVC Action
(3) (4)
4
Check the resistance value.
<Pilot Valve>
Machine Room
<Water Valve>
In door
(1) to (2)
(3) to (4)
360 ~ 420
Ω
Other
360 ~ 420
Ω
Other
Explain
Replace
Pilot Valve
Explain
Replace
Water Valve
Point
Result
SVC Action
(1) (2)
Dispenser
Ice Maker
<CON3>
3
Check the Blue to Gray on the Dispenser
PCB (While pushing the Water Button)
Pushing
Not
pushing
112 ~ 115 V
Other
0 ~2 V
Other
Go to the 4
Dispenser PCB
Go to the 4
Dispenser PCB
Water Button
Result
SVC Action