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Strange one yesterday

Discussion in 'Irrigation' started by AI Inc, Apr 17, 2014.

  1. AI Inc

    AI Inc LawnSite Fanatic
    Posts: 25,151

    RB esp 6 zone clock. Power at the taps. Power at the field wires in zone box
    When wired to a solenoid , no more power.
    Weird
     
  2. ArTurf

    ArTurf LawnSite Gold Member
    Male, from Ark
    Posts: 3,329

    Prob a nick in the wire and the current is grounding out. Jim will chime in.
     
  3. 1idejim

    1idejim LawnSite Fanatic
    Posts: 8,824

    That's the problem with using voltage alone to troubleshoot. Measure the resistance of the path and solenoid together and isolated. Measure for a short to earth. I'd bet you have a low resistance measurement to earth.
    Posted via Mobile Device
     
  4. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,442

    Voltage alone tells little. Since power is voltage divided by resistance, a too-high resistance in the wiring will kill the power, even if you can still have the expected open-circuit voltage when you take a measurement at the valves.
     
  5. AI Inc

    AI Inc LawnSite Fanatic
    Posts: 25,151

    Clock was junk.
     
  6. 1idejim

    1idejim LawnSite Fanatic
    Posts: 8,824

    Wonder why you'd get power at the clock and in the field and yet nothing under load?
    Posted via Mobile Device
     
  7. Sprinkus

    Sprinkus LawnSite Silver Member
    Posts: 2,047

    I've seen that before. A while back I had one that would cause the solenoid to rapidly cycle (chatter), but not open the valve.
     
  8. AI Inc

    AI Inc LawnSite Fanatic
    Posts: 25,151

    Was wondering the same myself. Never saw that before. After changing the solenoid and nothing I set a new clock next to the old one . Wired just that 1 zone and heard water come on. Ended up that was zone 1 , customer said zone 4 and 6 also didn't work. Changing clock also fixed zone 4 . Zone 6 was just a junk wire and luckily the original installer had extra wires there. A simple swap fixed 6.
     
  9. RhettMan

    RhettMan LawnSite Silver Member
    from Texas
    Posts: 2,034

    thx :)

    (ten charcters)
     

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