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If Solenoidal valve works in manual mode but not in Auto
mode. What should be the problem?
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Answer Posted / raffi
Signal(Soft PB) for SOV to open in Manual and Auto are same (DO)
While your are running in AUTO. it is working with interlock/logic i.e feedback from other IOs
While in Manual mode you should press the SOV button to open after change the mode to manual
If it not working in AUTO then Check the malfunction of feedback signal IO card or carryout the loop checking for feedback signal to sort out the issue
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