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Old 08-11-2003, 06:41 AM   #1
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Question another Generator question

Seeing another post about Gen sets got me to wondering.
( I do that too much )
I have a old Onan 2.5Lk that has served me well over the years in 2 rv's as well as a standby for home.
In it's present home, in my Argosy, when I start it up and it and it warms a bit ( 2-3 min.)
IF I switch the 40 amp B&W power converter on, it buzzes and hums (the converter) and there is a fluxuating amp draw on the input side(120V.) but it works fine.
If I switch the air cond. on for just a minute or less and then switch it off and then switch the converter on it acts normal.
I am thinking along the lines that the onan isn't able to "stablize" itself initally with a transformer load.
the old LK doesn't have any "electronices" in it ,I think it is an early 70's model
any ideas?
Thanks in advance,
ol' George

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Old 08-11-2003, 07:34 AM   #2
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2004 28' Classic
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huntsville , Alabama
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sounds like you have it figured out. gen sets can be a pain but they are great when you need them .

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Old 08-13-2003, 05:46 PM   #3
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1986 34.5' Airstream 345
Louisville , Kentucky
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Does it "hunt" for a constant speed or just fluctuate on the draw?
Steven Webster
1986 Airstream 345 Classic Motorhome
AIR 1760
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Old 08-14-2003, 05:17 AM   #4
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Thanks For the reply,
The Gen is stable, no problem, but the converter doesn't like it(the gen.) till it has supplied current for a couple of minutes to something else.
the Gen isn't hunting (rpm's) ,the voltage is steady at 130V.,
(I set it a bit higher so I can maintain 120V. at full load,( 20A.)

The converter has a built it Batt. charger, the input amps are about 2-3 amps just maintaining the batt. and increases slightly depending on how much you ask of it up to max of 40A.@ 14V.output
If you activate the charger from "shore power" no problem,
it also performs correctly if you load the generator first, then keep the load applied, OR unload it, then swirch the converter on.
The converter will Buzz(what I call a 60 cycle buzz and or hum and it will pull almost 10-12 amp on the primary side.
it will slowly quiet down and act normal after a minute or so,
It is un nerving tho, that it pulls so many amps till it settles down.

maybe I will pull it out and peek inside and see what it is doing
it almost sounds like a relay is chattering or a diode is shorting and I'm getting ac to the battery charge circuit.
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