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Thread: Rain Bird MV FAULT

  1. #1

    Question Rain Bird MV FAULT

    I have a Rain Bird esp-lxi16+. I keep getting an MV FAULT error. Can thi be fixed? The manual says i have an electrical fault has ocurred in the master valve or pump start relay circuit. How do I diagnose and fix that? Please

  2. #2
    Plumber jimbo's Avatar
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    Aug 2004
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    San Diego
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    There is a terminal on your timer labeled MV OR Pump Start. It is for just that, to open a main valve, or energize a pump start relay...in conjunction with opening a zone valve. If you have something connected there, it is telling you there is a fault...short,whatever. If nothing is connected to that terminal...the timer is kapooey!

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