No Flow Trouble Shooting
Check pressure during dose cycle. if pressure is equal to or greater than normal dose pressure solenoid valve is likely not working properly
A- Check circuit from plc to solenoid for electrical continuity (no broken wire)
B- If solenoid is receiving power and valve is not opening, then unscrew solenoid from top of valve and see if the solenoid plunger is retracting. The solenoid is bad if that does not occur. If bad then replace the solenoid.