Replace the solenoid. Tighten flow control. Repair or replace Controller. Problem Cause Remedy Valve won't turn on manually. Flow control turned off.
Water supply off at meter or system control shut-off.
Check by turning black knob counterclockwise until encountering resistance. Do not force beyond point of resistance. Turn knob back clockwise approximately one-half turn. Check this first by manually bleeding the valve with either bleed screw or by turning solenoid counterclockwise. If valve will turn on with manual, external, bleed screw but NOT by turning the solenoid for internal bleed, remove the solenoid and check solenoid cavity for debris.