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Cont. sweep on mp chassis


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  • Cont. sweep on mp chassis

    I have a mp chassis that has a cont. sweep.
    I've tryed the relays and the mp board it
    is in the mp chassis I'm sure. Does anyone
    have any suggestions.

  • #2
    Re: Cont. sweep on mp chassis

    Don't know too much about MP's, but on a SS chassis, I would check the C1 plug for bad pins, or check the sweep contactor for bad contacts. The lower conntacts are responsible for stopping the motors. That's all I have to offer. I'm sure the more experienced guys will have more.
    Give me a hammer and some duct tape and I can fix it!


    • #3
      Re: Cont. sweep on mp chassis

      A friend had a problem: after a cycle start, the sweep would continue to run, even with the contactor de-energized (watch for this).
      This naturally points to a high voltage problem. Normally, the upper contacts run the sweep, but they looked OK. After finally checking the contactors more thoroughly, we found that the front lower moveables, the ones that are hard to see, were turned 90 degrees, sending 110v to the uppers through the jumper. Problem solved.
      If, while the sweep is running, the contactors ARE energized, then you have a signal (low v) problem. Could be the pin in the C2A handling the SA n.c. grounding out.


      • #4
        Re: Cont. sweep on mp chassis

        Check for crossed wire in the push button on the side of the chassis...parallels the sweep run switch.

        Possible bad button in above, so disconnect both leads and tape off to see if problem goes away.

        What happens when you push the PBZ on the MP ?
        "Where are we going, and why are we in a hand basket?"



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