Rain Bird ESP-6TM Not working

Discussion in 'Irrigation' started by lep, Apr 13, 2008.

  1. lep

    lep LawnSite Member
    from Texas
    Posts: 52

    There are 4 stations in the front yard only, and the system has worked for more than a year without any problems. Presently, the valves are not opening at each station, although everything looks good at the wall control unit.

    Firstly, the system is set on auto mode. When I manually turn on the system by pressing the far right button, the times flashing at each station look correct -- but apparently the valves are not opening at each ground station.

    The system test worked good, and all of the displays (custom mode, with actual days "Su", "Mo" etc, time of day, and station times checked good). The 500 mA fuse is good, I also removed the battery and plug for 2 minutes then placed them back in.

    There is good water pressure at each station, since I was able to turn each control valve (ground boxes) 1/4 turn left and the stations came on with strong pressure.

    Question is: what causes the valves to not open when the wall control system appears to be functioning correctly? (did a landscaper cut the major wire bundle leading to all of the ground boxes?).
     
  2. hoskm01

    hoskm01 LawnSite Fanatic
    Posts: 5,690



    Could have happened, were they digging around the yard lately?

    Take a multimeter to the end of each zone wire in the box, better yet, check each terminal in the controller first. See if you are getting the appropriate voltage/amperage at the terminal, then at the valve box. If you have the first but not the latter, you have a wire fault in between. If missing the appropriate levels at the controller, then your controller is no longer in control.
     
  3. DanaMac

    DanaMac LawnSite Fanatic
    Posts: 13,156

    It does sound like the wires are cut, or at least the common wire. maybe the common has a bad connection at the valve box.
     
  4. AI Inc

    AI Inc LawnSite Fanatic
    Posts: 25,540

    Could be the rain sensor either activated or has a cut wire ( does the system have a sensor)?or a problem with the common ( neutral) wire.
     
  5. lep

    lep LawnSite Member
    from Texas
    Posts: 52

    Thanks for the suggestions. What's the voltage/amperage specs for the vanilla-flavor control valves for this unit? (My guess is 12DC, and the amps has to be less than 500 mA fuse).
     
  6. hoskm01

    hoskm01 LawnSite Fanatic
    Posts: 5,690

    24v, .65a.....

    That is stated specs for the controller, your valves will have an inrush and a holding current need, which are two different numbers.
     
  7. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 48,041

    With a simple multimeter, don't worry too much about reading voltages, except to see if there's any at the controller terminals. You want to confirm proper resistance readings through the wiring to the valves.
     
  8. lep

    lep LawnSite Member
    from Texas
    Posts: 52

    Thanks -- will look into all of this.
     
  9. AI Inc

    AI Inc LawnSite Fanatic
    Posts: 25,540

    From a simple perspective a sprinkler system needs electricity and water to work. If its not its not getting 1 or the other. Seems you already ruled out water.
     
  10. hoskm01

    hoskm01 LawnSite Fanatic
    Posts: 5,690



    Come back and stay a while next time! Hope you find it.
     

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