Low voltage out of Genset

[Alan]

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






--- In WanderlodgeForum@yahoogroups.com, "Alan"
wrote:
>
> My 87FC35 has a 8.0 kW genset. I am getting low voltage out of it
> (around 95 volts). On my last onan genset (77 GMC - carbed gas),
> this was a common problem and was simply corrected by increasing
> RPMs. (If this is the fix, how do I adjust idle speed? This fuel
> injection isn't as intuitive for me as I've been a carburetor guy.)
>
> I found an installation manual for the genset and it says to
adjust
> some "taps" on a transformer regulator. It also says "output
> frequency is determined by engine speed and normally does not
> require adjustment." I'm not exactly sure what it means
by "output
> frequency". Is that voltage??
>
> Is this problem more complicated than adjusting the RPMs? Maybe I
> don't have one of the Onan manuals..?? I have a parts manual and
an
> installation manual.
>
> I have searched the forums and did not find a post that seemed to
> address my situation. Let me know if I missed it.
>
> Thanks in advance,
> Alan Johnson
> 87FC35
>