I think it's electrical
Sounds like a short, or a malfunctionin soenoid. I assume when you said they all worked manually, you were refering to operating when you open the bleeder valve. You can test each for resistance, or use the battery test.....snap 3 - 9 volts together in series, and hitch each end of each solenoids wires to the + and - terminals to see if the valve fires. You might find by disconnecting each solenoid, you can fire them one at a time using your controller (but only attach one at a time.
May be a short in the common. Any recent digging?
If the valves work with the battery test, you know he valves are not the problem, it still could be th solenoids wiring or the controller.
Easiest way to r/o controller, is disconnect the rwires and hitch them up to a new controller. If it works, problem is probably the controller.