Blowing Fuses

Discussion in 'Irrigation' started by ArTurf, Aug 7, 2008.

  1. ArTurf

    ArTurf LawnSite Gold Member
    Male, from Ark
    Posts: 3,404

    I am dealing with a RainBird PC-506 that has started blowing the fuses that are in the controller, not the house breaker. I cannot get the fuses to blow when I manually turn on the stations but when I check a day or so after I put in a new fuse it is blown. Rainbird help line says it is a short in the wire to the valves but if that is the case why do they not blow when I manually turn on the valves.
     
  2. bicmudpuppy

    bicmudpuppy LawnSite Silver Member
    Posts: 2,781

    How long are you running it manually? My first guess would be that the bad wire is only grounding out after the water runs for the equivalent of a full cycle.
     
  3. CAPT Stream Rotar

    CAPT Stream Rotar LawnSite Fanatic
    Posts: 5,880

    wm solenoids?
     
  4. AI Inc

    AI Inc LawnSite Fanatic
    Posts: 25,210

    Or an unwaterproofed field wire geting wet?
     
  5. Howling PVB?
     
  6. AI Inc

    AI Inc LawnSite Fanatic
    Posts: 25,210

    Personal voltage blower?
     
  7. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 21,762

    A solenoid that heats up could blow the fuse.
     
  8. DanaMac

    DanaMac LawnSite Fanatic
    Posts: 13,156

    Yes and sometimes it could take 5-20 minutes before it heats up. Seen it once, and SprinklerGuy mentioned it to me a quite few times.
     
  9. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 21,762

    I just replaced one where the fuse was blowing, but no "short" warning
    showed on the clock. Had to ohm each one out & replaced the one with
    the lowest reading, problem solved.
     
  10. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,880

    You could just install 10 amp fuses, and come back later and install a better controller, after the old one burns out. :p
     

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