Question
I'm having trouble reseating I have the 9 volt out and can't program with just the Trans in.  My control LED has a master valve note at the bottom left. What is the step by step procedure to rectify this?

Answer
Hey Erik, you can put the dial to "manual-single station" and press the "off" button, and you should get back to normal operation. Normally if your controller is telling you master valve, it means either the wires going to the master valve, or the solenoid going to yhe master valve is shorting out. You probably need to fix the problem, otherwise each time the controller activates a valve, it will probably trip the internal circuit breaker again. Good luck and have a great day.