CAUSE #1:
Solenoid is not receiving power.
SOLUTION:
Place your fingers around the solenoid
coil to see if it is receiving power. There should
be a slight vibration and humming. If not, verify
that there is output at the controller by using a
volt meter. If there is electrical output (24 VAC)
then the problem is either a bad coil or broken
wire. Check the coil by disconnecting solenoid
lead wires from valve wires and measure ohms
with an ohm meter. A reading of 24 to 27 ohms
means the coil is OK. If reading is 0 or infinity,
replace coil.
CAUSE #2:
Flow-control handle is turned all the way
closed (clockwise).
SOLUTION:
While solenoid is energized, turn flow-
control handle counter-clockwise a half
turn at a time until sufficient coverage is
observed.
12
Troubleshooting
PROBLEM: Valve will not open when
energized
12
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