Question
QUESTION: Hi, I inherited this controller without any manuals. The irrigation system has always been open and closed by a service provider.  This spring, the system was reported to be fine but it doesn't seem to be working.
I tried to start it manually but nothing happens.  There is electricity to the controller and the water valve is open.  On the control panel, it indicates "Master valve" when I try to run a zone.
Any ideas?  Thanks for your help.

ANSWER: http://www.irritrol.com/controller_manuals/pdfs/manual_totalcontrol24.pdf

Above is a link for a manual of a similar controller that you should find helpful.

If you could take a picture of the wiring on the inside terminals of the controller it will better help me understand the issue. But is sounds like there may be a short with the mastervalve or in the wiring associated with the mastervalve. The mastervalve controls the rest of your valves so it has a direct effect on your systems operation.

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hardie.3   QUESTION: Hello again.  Here is a picture of the wiring.  Hope it helps. I read the manual you sent but it doesn't say any more than what you already have.
If it is a short with the mastervalve, does that mean I need to get an electrician?
Thank you for your assistance.

Answer
Yes your wiring does indicate you have a mastervalve on the system. And the most common reason for a short reading is a solenoid that needs to be replaced. It is a extremely simple repair for anyone that is semi handy and would not require an electrician to do so. The trick is locating the proper valve that needs the service. Typically it is found after the backflow device and before the first zone valve on the system.

Here is a link to a pic of a valve

https://yard-boss.com/store/sc_images/products/435_large_image.jpg

The solenoid is the part where you have the two wires coming out of the top of it. Once you find the master valve you will want to purchase a replacement solenoid for it. Before you replace it you will want to shut the water off to the system. Replace the solenoid and connect the two wires to the exact same wires you pulled the old one from. Tighten the new solenoid hand tight, do not over tighten. Turn the water back on and check to see if you have resolved the issue. A replacement solenoid should cost roughly $10 or less and the total time of the repair should be 15 minutes or so plus your time spent locating the valve and getting the right part.

Good Luck,
Bob