DIAGNOSTIC
6-10) If Water Drawer doesn't work normally
Preliminary Check
1.Stop water supply before disassembling or assembling because water is directly supplied to the water valve.
2.Keep in mind to avoid shock hazard during disassembly because power is always present on one side of wire.
Check water coming out when pressing water lever at dispenser.
Measure both terminals of RY7C contact point after disconnecting CN72 and CN73 connectors.
Start
Does it work normally when |
| YES | |||
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selecting water? |
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| NO |
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| Normal Working Condition | |
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Was dispenser water |
| YES | |||
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s/w pressed? |
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| NO |
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| Check the instrumental interference | |
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| of dispenser water s/w. | |
Does Main MICOM No. 13 maintain |
| NO |
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0V when pressing water s/w? |
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| YES |
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| Check CN50 connector, wire | |
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| and failure of water s/w itself. | |
Does IC74 No. 16 maintain 0V |
| NO |
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when pressing water s/w? |
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| YES |
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| Main PCB failure: Replace it | |
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| (IC74 failure). | |
Is RY70 relay AC contact terminal |
| NO |
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0Ω when pressing water s/w? |
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YES
Normal Main PCB
-Need to check other sections. Check the wire between WATER SOLENOID VALVE and MAIN PCB. Failure of WATER VALVE itself connector contact failure
Check for connecting pipe failure.
Main PCB failure: Replace it. (RY7D Relay Contact Terminal Short Failure)
74
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