6-9) When Water Valve Does Not Operate - Samsung RS2530B Service Manual

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TROUBLE SHOOTING

6-9) When Water Valve Does Not Operate

Pre-Check
1. While disassembling, make sure to cut off water since the water valve is directly connected with water.
2.Makesure toavoidthe electricshock while disassembling because one end of wire is applied with power.
3.Check operation of water valve only after the water switch is pressed
Reference
Load check-up method
Reference
Load check-up method
(0V upon Relay Operation)
Check Water
Valve Operation
Is valve operation
confirmation sound heard
when Water S/W pushed?
NO
Does Main PCB MICOM #21
have high (+5V) output?
YES
Does Main PCB MICOM #11
have low (0V) output?
YES
Is the contact point of
main PCB RELAY RY71
normal?
YES
Does the input voltage
occur between the main PCB CN70 (⑦ W/BLK)
and CN71 (⑨ GRY)
NO
MAIN PCB Normal
-Check other parts
1) Wire between water value and main PCB
2) Water Value defect and Connection
Connector contact defect
3) Check Connection Hose defect
62
YES
Normal (check the
water valve hose)
NO
Soldering short
check/ PCB change
NO
Soldering short
check/ PCB change
NO
Soldering short
check/ PCB change
YES
Soldering short
check/ PCB change

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