Intellivalve Trouble

[Snikwah]

We were on vacation for a week and upon our return, both the intake and return intellivalves "seem" to be dead. No lights on at all.
I have checked the wires and both seem intact all the way into the intellicenter board. I killed the power and unplugged them and plugged them back into the board, but still nothing..no lights on either valve. I just find it hard to believe both of them went bad at the same time. I guess it's possible, but just seems highly unlikely. @MyAZPool do you have any suggestions on what else to check?

 

[ajw22]

You can use a multimeter and check for 24V AC between the center pin and the outer pins. Be careful not to short the pins while probing in the connector.

You should get 24 VAC between one of the switched legs and common.

The switched legs are connected to one side of the transformer output by a single pole double throw switch so that only one leg is powered at a time.

If you apply power to one switched leg and common, the actuator will rotate in one direction.

If you apply 24 VAC between the other switched leg and common, the actuator rotates the opposite way.