Low voltage out of Genset

[Stephen Birtles]

Just a thought but if the rear air seems to be pulling excessive
current Iwould check the fan motor I replaced 2 this rear when I
thought it was power and shore problems it was in fact partially
seized fan motors and when removed in the spring you could not even
turn them with a pair of monster pair of grips
Stephen 77fc35


--- In WanderlodgeForum@yahoogroups.com, John Suter
wrote:
>
> Alan,
>
> To Ralph's points (circuit board/regulator issues),
> the fact that the voltage drop appears excessively
> large when using the rear air, I would add the
> possibility of corroded/faulty neutral generator feed
> line. If you are sufficiently, technically,
> electrically-capable, you could run an additional
> temporary/parallel neutral to the rear air from the
> gen using #8 or so, to rule in/out the neutral
> problem. Don't try this if you have the least doubt
> about your capabilities, however.
>
> In your case, the "no load" rise from 108 - 108 to
> 104.5 - 110 under rear air load, is probably not
> significant enough to signal stator/rotor problems;
> Were it 90 - 130 or greater, I might have concern.
>
> Do not allow the rear compressor to run any longer
> than is absolute minimum time necessary to check the
> readings, or damage may result, and avoid any
> microwave or other electronics when 90v or below.
>
> John
>
>
>
> --- "Ralph L. Fullenwider" wrote:
>
> > Alan:
> >
> > You have gotten some good advice on this. Do not
> > increase the RMS changing
> > the freq. It sounds like you have corroded
> > connections or weak breakers on
> > the gen set. Start by checking the voltage at the
> > breakers, the input side
> > then the out put. If the voltage drop is not found
> > there, check the
> > connections in the electrical box (should be just
> > inside the gen
> > compartment in the upper corner). Of course the
> > voltage being read at the
> > meters does go through shunts and those reporting
> > wire connections could be
> > corroded as well. With the readings below, your gent
> > set sounds like it is
> > fine. I do remember 2 occasions, after checking the
> > input side of the
> > breakers on the gen set, that the voltage was low
> > there and had to replace
> > the circuit board on one, and the regulator on the
> > other, which took care
> > of the problem in both cases.
> >
> > Safe travels,
> >
> > Ralph and Charolette Fullenwider
> > Ralph's RV Solutions, Duncan, Oklahoma
> > http://home.swbell.net/rlf47/index.htm
> >
> > At 04:38 AM 8/23/2006 +0000, you wrote:
> > >Ok, here are my findings so far.
> > >
> > >1. Engine RPMs - right at 1800 (I bought a
> > vibration tach, as
> > >suggested.)
> > >2. Frequency stays right between 59.5 and 60.5
> > whether under heavy
> > >load or not.
> > >
> > > Leg 1 Leg 2
> > > ------ ------
> > >No (very little) load 108v 108v
> > >Front a/c only 104.5 110
> > >Both a/c's on 104 101.5
> > >Rear a/c only 100 91 (a/c
> > compressor is having
> > >trouble running)
> > >
> > >When on shore power I've got right at 120v. On the
> > generator, I'm
> > >obviously low on voltage all the time, but do these
> > different
> > >readings tell you guys anything? Do I just need to
> > up the rpms, or
> > >will that mess up my frequency??
> > >
> > >Thanks!
> > >Alan Johnson
> > >87FC35
> > >
> > >
> > >
> >
> >
>
>
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