Question about Generac Guardian 100 Amp Transfer Switch with Service Disconnect NEMA 3R

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Had a power interruption last night and generator did not start. After the storm passed I shut the main breaker in the electrical panel to simulate a power failure and the generator did not start. Opened the cover this morning and saw the overcrank red light on. That was the the only light on. Checked batter for power and it was o.k. Tried to start manually but would not crank. The only sound it made was a loud click.

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  • 051792 Jul 12, 2009

    Checked condition of battery with two different hydrometers. Both showed each cell excellant and fully charged.



    I hear the solinoid opening and I can smell the natural gas, but still the generator will not start. This is a new battery, less than two years old.

  • 051792 Jul 12, 2009

    I will attempt to troubleshoot the power and grounding issues tomorrow morning, but can you tell me what would cause the overcrank waring light to come on?

  • 051792 Jul 13, 2009

    I have checked and there is power at the starter. All connections seem to be good, secure and not corroded. There is a good ground bond from the generator to the ground rod.

  • 051792 Jul 13, 2009

    Tried hitting starter. No change

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How is the battery condition? The click you hear is the starter solenoid pulling in. Check all the connections at the battery, engine ground and starter including the solenoid. You have to 'load test' the battery. Just reading the voltage on the terminals isn't good enough, a near dead battery will read 12 volts with 'no load'

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

Posted on Jul 12, 2009

  • 3 more comments 
  • Craig Butler
    Craig Butler Jul 12, 2009

    Check power at starter motor terminal. Check all the connections and make sure ground wire is tight.If you have power at the starter terminal, make sure the engine ground is solid back to the battery.

  • Craig Butler
    Craig Butler Jul 12, 2009

    Because it get a start signal, but never started.

  • Craig Butler
    Craig Butler Jul 13, 2009

    It must be a bad starter motor then. I want you to try one more thing though, when all else fails, hit it with a hammer! I'm serious, they get hung up; give it a couple good wraps with a hammer.

  • Craig Butler
    Craig Butler Jul 13, 2009

    The ground rod bond is for the generator electrical system. I'm talking about the battery ground. Make sure the engine to battery neg is good.

  • Craig Butler
    Craig Butler Jul 13, 2009

    I'd have to say you have a bad starter motor. If there's power at the starter, and the ground going back is good, it's a bad starter motor.

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Perform the following procedure to enter the simulation mode.
"#" key "*" key "C" key "*" key

Main code 14 Start key Sub code 0 Start key

OR

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