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Sprinkler zone starts, but then quits

dtirey

New Member

Posts: 10

21

Sunday, January 8th 2012, 8:44pm

Yeah Mrfixit, and I did. However, I was only taking resistance readings and the readings weren't necessary out of specs. That's why I used a toner. Thanks though for the help.

wsommariva

Supreme Member

Posts: 332

Location: Northern New Jersey

22

Monday, January 9th 2012, 5:32am

What's a toner? And that common wire - a ground? I thought it was a neutral.

Bill Painter

Advanced Member

Posts: 59

Location: Phoenix Az USA

23

Monday, January 9th 2012, 8:51pm

Sprinkler zone starts, but then quits

I'm suspect of valve #1 and the Master Valve....
The first two solenoids' resistances were kinda low, and I didn't see were the master valve was tested for resistance.
I've had solenoids read well within their limits (for any given manufacturer) start shorting out after a period of time [from 10 seconds to as much as 3-5 minutes] - and the longer the solenoid had power, the less the resistance became finally breaking the circuit...
As a soleonid begins to short out the windings, the resistance becomes less and they start to heat up... and the more they heat up, the more windings become shorted...ad infinitum.
Way to check.... Jot down the resistances on all the valves including the master valve. Run the valves in queston and check 'em out right after the clock craps out... is the resistance is lower than it was when you checked it cold? 20 Ohms or less... replace the solenoid....
Good Luck.... Bill
tismaz.com
The Irrigation Specialist Mfg' Az.
Please check my website and you'll find what I do and the unique tools I make and market.
Real timesavers, especially the Suck-Tube and Krik-It.
http://www.tismaz.com

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