Generac 13,000 Watt / 13,000 Watt Home Standby Generator Logo
Posted on Jul 08, 2009
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Attempted to start Generac Guardian 15 kw air cooled generator and the unit shuts down with 'overspeed' fault.

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  • Anonymous Mar 12, 2014

    Unit shuts down when idle control switch is activated

  • Anonymous Mar 21, 2014

    xg 8000/10,000 generac, no ac, fault in generator, how do i reset?

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  • Posted on Jul 08, 2009
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Check for dirt dobbers or trash in speed control mechanism.

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  • Posted on Jul 09, 2009
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I work on these every day. Its either gonna be the rotor or stater, the voltage regulator, but most likely its a bad stepper motor which is the throttle motor, or control board. Thats all that could be causing that so its one of those. If its the rotor or stater thats bad it causes the generator to RPM up because it thinks its not producing enough power due to that. I had the same problem with the same one we just fixed and it was the slip rings on the end of the rotor so bad rotor.

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Anonymous

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  • Posted on Jun 07, 2010

SOURCE: Generac Guardian 15 kw overspeed fault

Did you remember to set the overspeed shutdown threshold on the control board?

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If you need further help, I’m available over the phone at https://www.6ya.com/expert/craig_3fa289bf857b1a3c

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