It has been working for 3 weeks, but now it does not. 

I have checked all 7 zones. No wiring issues. Has proper voltage. 

It just won't come on. How do I get it to work again. This is a new unit. Sprinklers are all fine and had a tune up when the Sprite was installed. 

I have unplugged it and plugged it back in. I need help soon, I have new sod and many new plants in my yard and gardens.