Irritrol RD900 Solenoid Chatter
I am trying to diagnose a problem with my sprinkler setup, controlled by a Irritrol RD900.
When a particular valve is set to ON, the valve solenoid chatters (i.e. they fluctuate between on and off), this causes inconsistent water flow, and a fair bit of water hammer.
I've brought the Solenoids up to the control box and wired them directly to the terminals and they still exhibit chatter .
Measuring the voltage coming out of the terminals, it wavers around the 20vac mark, occasionally dropping to 0.
I've tried plugging the Controller into a different outlet to no avail.
Any ideas please?