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  #1  
Old 11-25-2012, 06:38 PM
SCBigE SCBigE is offline
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Location: Hilton Head Island, SC
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I need irrigation help!

ive got one account that is nothing but an irrigation cluster f..k. Just as i took on the account i had to replace the box, which the customer said it was the third time. When i replaced the box only 3/4 of the stations worked but the owner said they all worked before i installed the new box. Ever since i replaced the box i loose stations by the week and am down to 2 working now. I tested with a multimeter at each valve and the all have power. I am going to start replacing salenoids next week. WHAT ELSE AM I DOING WRONG? OR IS THERE SOMETHING ELSE I NEED TO CHECK?
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Old 11-25-2012, 06:43 PM
Mjtrole Mjtrole is offline
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I would start at the controller, measure resistance of each solenoid write them down and then check them at the valves, you could have a bad wire splice buried someplace or some bad wiring what kind of site is it?

Quote:
Originally Posted by SCBigE View Post
ive got one account that is nothing but an irrigation cluster f..k. Just as i took on the account i had to replace the box, which the customer said it was the third time. When i replaced the box only 3/4 of the stations worked but the owner said they all worked before i installed the new box. Ever since i replaced the box i loose stations by the week and am down to 2 working now. I tested with a multimeter at each valve and the all have power. I am going to start replacing salenoids next week. WHAT ELSE AM I DOING WRONG? OR IS THERE SOMETHING ELSE I NEED TO CHECK?
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  #3  
Old 11-25-2012, 06:59 PM
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mitchgo mitchgo is offline
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It's very rare to have multiple items fail and then other multiple items fail within a small amount of time that are all unrelated.. Although that does happen , more then likely there is a bigger issue at hand such as the previous post as a bad wire connection somewhere in the field.

Measuring resistance at the controller- documenting and at the valve. A wire tracer and re-doing wire connections would be the start.

Think of it as a shotty car repairs man. The alternater is bad but the guy instead replaces the Battery, Harnest, belt ( For some reason?) , Key ignition switch and then he is confused why it's still happening. If you feel you are in over your league you might want to sub this one out?
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  #4  
Old 11-25-2012, 07:06 PM
agrostis agrostis is offline
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Location: Winston-Salem NC
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There are a lot of big thunderstorm's on HHI, is that the reason you had to replace that controller ? Is the controller grounded ? It's hard to get a good ground in sandy soil. Lighting can cause trouble all over the place. What kind of lightning protection do you have ? How old is that system ? Bad connection's are a big problem a lot of the time, but an easy fix, if you know were they are. You need to post more detail's.
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  #5  
Old 11-25-2012, 07:50 PM
SCBigE SCBigE is offline
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For all who have replied

the system has never been grounded since new and has been struck a few times do to large oak trees surrounding the box. i have not done resistance tests from valve to the box due to i dont have 100 ft leads on my multimeter and this is a 5 acre property all irrigated
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  #6  
Old 11-25-2012, 08:45 PM
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1idejim 1idejim is online now
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Quote:
Originally Posted by SCBigE View Post
the system has never been grounded since new and has been struck a few times do to large oak trees surrounding the box. i have not done resistance tests from valve to the box due to i dont have 100 ft leads on my multimeter and this is a 5 acre property all irrigated
I read both posts and you are in over your head.

1. check the line power into the controller.
2. check the vac at each station.
3. short to earth resistance measurements of all field wires at both ends for comparison.
4. measure resistance/continuity of each station.
5. measure the resistance of both the wiring back to the controller and the isolated solenoid.

Once you have performed and documented all of these measurements you can post the results and let the games begin.
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  #7  
Old 11-25-2012, 10:25 PM
bcg bcg is offline
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Originally Posted by 1idejim View Post
I read both posts and you are in over your head.
Sorry but...this.

Get help.
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  #8  
Old 11-25-2012, 10:44 PM
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1idejim 1idejim is online now
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Quote:
Originally Posted by bcg View Post
Sorry but...this.

Get help.
what do you mean?
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  #9  
Old 11-26-2012, 06:44 PM
muddywater muddywater is offline
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Quote:
Originally Posted by SCBigE View Post
the system has never been grounded since new and has been struck a few times do to large oak trees surrounding the box. i have not done resistance tests from valve to the box due to i dont have 100 ft leads on my multimeter and this is a 5 acre property all irrigated
What does that mean? Why would you need 100' leads?

I think if you report your findings back to this board, these guys could really help you. But they need more info!
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  #10  
Old 11-25-2012, 07:51 PM
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cjohn2000 cjohn2000 is offline
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I fixed something like this earlier this fall, buried splice with water resistant connectors outside the building where the wire went from #14 to multistrand to the controller. Just above this splice was a hose bib which a resident told me was leaking. The landscaper replaced the controller in an effort to fix the problem. when I arrived all zones (weathermatic valves) had approx. 70 ohms of resistance, and between any two wires you could complete a circuit.
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