Thanks do much Emery I'll working on it in a little bit here and I'll let
you know what I find.
Jim
> There is a possibility that its a bad breaker on the top of the Onan or
> perhaps a bad bridge rectifier.
>
> First make sure that the cord from the Onan is plugged into the
> receptacle..
>
> Take the cover off the breaker box at the top of the Onan.
> Use a voltmeter (VOM). Start the Onan and check the AC voltage from the
> left side of the breaker to ground.
> If there is no voltage there its probably the bridge rectifier.
> If there is 120 volts there then check the right side of the breaker. If
> there is voltage there then the problem is in the wires going to your
> inside breaker box or a bad connection in the box or a bad breaker in that
> box.
> If there is no voltage there reset the Onan breaker. If still no voltage
> then that breaker is bad.
>
> Let us know what you find and we’ll offer more suggestions.
> connection
> Emery Stora
> 77 Kingsley
> Frederick, CO
>
> >
> > Good morning all,
> > If I may,I would like to ask an Onan on this thread. I fired up the
> > Onan and started one of the A/C units all is good running fine. About 5
> > minutes later started the 2nd unit everything is purring right along as
> it
> > should.
> >
> > I left and went to pick up grand kids from school and another errand,
> gone
> > about an hour total. Got home Onan running fine. I thought man it's going
> > to me nice and cool in here. Nope it was hot and no A/C unit was running.
> > Ah s***t I said. Turns out no 120V at all. Checked breaker box etc.
> > Nada. Looked at reset button the Onan, ok. Got out service manual,
> looked
> > at possible causes. Where do I start first with this now?
> >
> > Big thanks in advance,
> >
> > Jim Ernst
> > 77 Palm Beach
> > Columbus, NE
> > Currently on location
> > In Colorado Springs area.
> >
> >
> > I am still working on this generator from hell. I thought and still
> think
> > that I still have all of the wiring corrected. Now I am fighting a
> blown 5
> > amp fuse after starting. It does it almost every time. I finally
> > installed a temporary circuit breaker to keep from going through fuses.
> I
> > think I
> > have traced it down to the fuel pump. A Fluke amp probe show a stead 3.1
> > amps going to the board with an occasional very brief jump to slightly
> over
> > 5 amps. I will try a replacement aviation Facet or Bendix fuel pump
> > tomorrow. If it were voltage spikes I could see it on an oscilloscope
> but I
> > do
> > not have am amp probe for it.
> >
> > The second bug is still the up to speed circuit. I had it working for a
> > while and not it start and stops again. I finally checked the output of
> the
> > alternator and it is a steady 24 VAC. It should be 28 to 30 or 31.
> > Tomorrow I'll probably remove the flywheel and inspect the coils and
> inside
> > flywheel for dirt and rust. I can see no way to bring up the voltage
> other
> > than that. It reads 24 VAC (NOT 28) when plugged into the board or
> > disconnected from the board.
> >
> > My final shot might be to jumper out the resistor in series wit K2. I do
> > not remember the value of that item on a dinosaur board but I though
> George
> > Z's resistor read something like 22 or 44 ohms. On the genuine Onan
> board
> > that resistor is 200 ohms.
> > --
> > Ken Burton - N9KB
> > 76 Palm Beach
> > Hebron, Indiana
> >
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