Question
I turned on my system yesterday. When the water was turned on all sections (3) of the system turned on even though the clock was still in the off position.  They stayed on even when the control clock was turned off.  The only way I could turn off the water was to turn off the water.  The supply to the sprinklers.  The valves or irritrol.

Answer
Hey Naomi, I hope this helps. You're problem is that the valves are stuck on. There are a possibility of three things going on. First thing is what is considered a bleed screw that is opened on the top of the valve. When the water is on to the valves, do you see any water leaking from the top of the valve? If you see water leaking from a black plastic screw, this is called a bleed screw, and is used to turn the valve on manually without the aid of the controller. If you see water coming out of this screw, simply tighten it and see if the water stops leaking out of this screw, and the valve will shut off. The second thing could be the solenoid on the valve. Inside the solenoid is a piston that raises when the power is turned on to it, to turn the valve on, and when the power is shut off by the controller, the piston drops down to shut the valve off. Check this piston inside the solenoid, and see if it moves freely up and down. To do this, the solenoid will simply un-screw from the top of the valve, and you can check the piston(or plunger same thing). The third thing is whats called the diaphram. This is a rubber membrane that sits between the top half and bottom half of the valve body. If it has a tear or rip in it, the valve will not shut off. To check this piece, the screws need to be un-screwed(8 screws), and this will allow you to access the diaphram and check it or replace it. Let me know if I can answer any more questions, thanks and have a great day.