Station coming on ahead of start time on rainbird esp4.

Discussion in 'Irrigation / Sprinkler Forum' started by Lesley Tuggle, May 6, 2019.

  1. Lesley Tuggle

    Lesley Tuggle New Member

    May 6, 2019
    Two solenoids were recently replaced on valves on two different controllers. Front garden controller start time is 5p.m. the back garden start time is 6p.m. However both the stations come on at the same time 5p.m. Even though they are on different controllers. The back station comes on again at the set time 6p.m. How can this happen? What should I do ?
  2. WorthFlorida

    WorthFlorida The wife is still training me.

    Oct 28, 2009
    Orlando, Florida
    Someone tied the two zone wires together somewhere or from a short. Most controllers can handle up to two solenoids per zone without any problems. On irrigation systems one side is a common wire (24v ac) and usually all the have one side of the solenoid tied together by daisy chaining the connections for all solenoids. With one trench all wires go in the same treach feeding all valves. Perhaps at one of these replacement solenoids someone tied two zone wires together. At times a zone wire is spliced at one valve box to make it to the next valve box. If the wires are the same color and sometimes the old wire nuts come loose, someone tied them together.

    On controller 1 disconnect the zone wire with the problem and turn on controller two. See what happens. Then do the opposite. This should prove a short exist.

    At both valve boxes open the up and check the wiring. The two solenoid wires, the common side (usually white) may have three wires, one to the solenoid, one wire in and one wire out to the next valve box. The other wire will have only two wires, one for the solenoid and the other from the controller.
    Last edited: May 7, 2019
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