LG LSC27914SB - Page 100

Check for loose connections in Main PCB CON 3 &
CON 4, also check in Machine Room the Valve Assy
connector.
Check Water Valve signal in CON 3 & CON 4.
1
2
NO.
CHECKING FLOW RESULT & SERVICE ACTION
3
Check Lever S/W signal in CON 4.
Lever S/W
Service Action
Pressing
Go to Step 3
0 Vac
4
Other
Change PCB
Not Pressing
Go to Step 3
50~70 Vac
Other
Change PCB
Lever S/W
Service Action
Pressing
Go to Step 5
110~127 Vac
Other
Change PCB
Not
Pressing
Go to Step 5
0 Vac
Other
Change PCB
Check impedance of Water Valve & Pilot Valve.
Result
Service Action
Firmly plugged
Loose
Go to Step 2
13) Water dispensing mode is not working
Lever S/W
Service Action
Pressing
Go to Step 4
110~127 Vac
Other
Change PCB
Not
Pressing
Go to Step 4
0 Vac
Other
Change PCB
Check Pilot Valve signal in CON 3 & CON 4
1
2
3
4
6
5
Lever S/W
Service Action
to
Explain to costumer
33 ~43 Ù
Other
Replace Valve Assembly
to
Explain to costumer
2.88-3.52Ù
Other
Replace Valve Aseembly
1
6
2
3
- 99 -