4 of the 6 zone won't work

Discussion in 'Irrigation / Sprinkler Forum' started by MP, Sep 3, 2007.

  1. MP

    MP New Member

    Sep 3, 2007
    My sprinker unit is 13 yrs old, which has a 6 zone sprinker system. Zone 1,2,3,4 won't work. Zone 5 and 6 works fine.

    The first 4zones won't come on. The wiring all look OK. When I run the unit on manual mode and turn on the 1st. zone, I noticed that there is voltage (approx 10-15 v) on zone 2,3,4. However, zone 5 and 6 have "0" volts. So there is bleeding of voltage on zone 1,2,3,4 which ever zone I make it active.

    When I go to manual mode and set zone 5, the voltage on this zone is 20 V and all the other zone show zero voltage. Ditto for zone 6 also. Which I guess should be the way it should work.

    What is going on on zone 1,2,3,4. What should I do to fix this issue. I thought the control box is fried and just replaced a brand new Rain Bird system. Please help ....:( ....appreciate your help in advance.

  2. jimbo

    jimbo Plumber

    Aug 31, 2004
    San Diego
    First, I would not rely on any voltage meaurements taken with all the wiring connected. I would disconnect all wires at the controller, and repeat your test measurements. My first suspect would be an open neutral ( probably white) wire involving one or more of those 4 valves. Such an open can cause you to get confusing voltage measurements like you did. You will just need to disconnect things and make some contiuity measurements on all the wires.
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  4. the wet maker

    the wet maker New Member

    Sep 6, 2007
    are you sure all your solenoids are good?
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