alarm light on. Rainbird ESP 4MI controller

Discussion in 'Irrigation' started by Ed G, Dec 18, 2006.

  1. Ed G

    Ed G LawnSite Member
    Posts: 140

    Yesterday, I opened the controller box (Rainbird ESP 4MI) to see what time it was and I found the alarm led on.

    All zones work fine in manual mode and in test mode. Nothing on the display panel indicating a problem.

    I'm suspecting a problem with the rain sensor - a Hunter Rain Click.

    The alarm light went off when I flipped the sensor switch to "bypass". Alarm comes back on when I put the switch back on "active"

    The Hunter sensor is wired to the two "sens" terminals in the rainbird.

    Any ideas what would trip the alarm light?

    It had rained earlier in the day and the sensor may have still been wet. The irrigation system was not scheduled to run until today.
     
  2. Flow Control

    Flow Control LawnSite Bronze Member
    Posts: 1,267

  3. Ed G

    Ed G LawnSite Member
    Posts: 140

    normal function, eh?

    This was the first time I had opened the controller door when it was wet outside (early rain with heavy morning fog and dew) since I installed the irrigation system.
     
  4. Flow Control

    Flow Control LawnSite Bronze Member
    Posts: 1,267

    When the light is on and you have the sensor switch on active will the system still turn on manually?
     
  5. Ed G

    Ed G LawnSite Member
    Posts: 140

    no. I had to switch it to bypass to activate the valves.
     
  6. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,472

    What does the controller manual have to say about rain detectors?
     
  7. Flow Control

    Flow Control LawnSite Bronze Member
    Posts: 1,267

  8. NC_Irrigator

    NC_Irrigator LawnSite Bronze Member
    from NC
    Posts: 1,415

    :dizzy: I thought the alarm light ment you had a 6" or larger mainline break!!:drinkup:
     
  9. PurpHaze

    PurpHaze LawnSite Fanatic
    Posts: 5,496

    It must be acting up then and giving out a false reading. Ed's largest line in his system is 1-1/4". :drinkup:
     
  10. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,472

    I thought the alarm light signalled the presense of stagnant pressure. :dizzy:
     

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