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operating water solenoid valve not function

Operating water solenoid valve malfunctioning.
Causes and remedy
1. Control unit is defective.
Action:  contactact service backup support. 
2. Wire break in the connecting terminal. 
Action: Replace wire. 
3. Connecting terminal on the connector block is loose.
Action: tighten the screw of terminal.
4. Coupler socket loose.
Action l: tighten coupler socket. 
5. Magnetic coil defective.
Action: Replace the solenoid head. 
6. Diaphragm defective. 
Action: Replace diaphragm. 


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