P,
As a test, I would move the actuator connector from of the Solar port and plug it into the another port you know is working.. If you have valve "B" running a waterfall, as an example, you can plug it into the B port and see if the solar valve valve moves back and forth when you turn the waterfall on/off. If it does, you will know the actuator and wiring are ok and the problem has to be in the EasyTouch. If it does not move, you know the problem has to be the actuator.
Thanks,
Jim R.