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Mike_and_Pat's avatar
Mike_and_Pat
Explorer
Feb 07, 2014

Is My ATS going bad

Usually I turn off all high draw items and start the Generator before I leave a campsite and the go out and unplug the electrical cord and do the reverse when I get to a new camp site (turn off al high draw items and the plug in the electrical before turning off the generator) In the past there was no problem. The Power Management System would show generator power only until I shut the generator off and then would show 50amp if that is what I was plugged into. And iff I were to start the generator before I unplugged the electrical cord it would show 50amp until the generator came on line and then switch and only show the generator. Lately it has been showing both sources at the same time. I have quickly removed one of the power sources as soon as I saw this. So is my Automatic Transfer Switch gone?
  • SCVJeff's avatar
    SCVJeff
    Explorer
    Feb 08, 2014
    ADAD437 wrote:
    why would you want them both on at the same time anyway? why not shut down then plug in?
    #1- Its supposed to switch
    #2- its not uncommon to be in a 20 or 30A service and fire the gen up for microwave use, etc. I do this all the time when running a EU2000, but maybe we need an extended run on the MW, and the Honda can't handle the load.

    The ATS takes care of that. But, what the OP is talking about is what his EMS panel is reporting. Thats not really an ATS function.
  • ADAD437's avatar
    ADAD437
    Explorer
    Feb 08, 2014
    why would you want them both on at the same time anyway? why not shut down then plug in?
  • SCVJeff's avatar
    SCVJeff
    Explorer
    Feb 08, 2014
    Actually I have the same EMS and coach, 2 years newer and pretty sure it operates as you originally stated. I'll go out tmw and verify.
  • Mike_and_Pat's avatar
    Mike_and_Pat
    Explorer
    Feb 07, 2014
    Thanks, Chris, It could be just my old mind not remembering properly. I will give it a check. thanks for your imput.
  • Chris_Bryant's avatar
    Chris_Bryant
    Explorer II
    Feb 07, 2014
    Are you certain that has changed? The power management system knows about the 50 amp by sensing 240 volt power, and genset by sensing the energized genset tag line, so it can sense both at the same time without there being a problem. Try flipping the genset breakers off- it should read both 50 amp and genset but never switch over.

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