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Old 05-07-2002, 08:11 AM   #1
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Question Univolt Low Buzzing Noise

We're brand new Airstream owners. We just got our 81 Excella 2 set up in the campground. We are noticing a low buzzing noise in the front of the camper. After a long time searching, I figured out that it is coming from the Univolt. The buzzing is constant and low pitched, not very loud. Is this normal? Thanks for the help.
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Old 05-07-2002, 09:18 AM   #2
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When you are plugged in to shore power, there is a low level buzz that is normal from my experience. When I plug in this confirms my connection..and continues all the time I am connected.
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Old 05-07-2002, 12:57 PM   #3
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I replaced my univolt a couple of years ago because it stopped working. The new one doesn't make any where near as much noise as the old one did, but you can still hear it. You need to worry when you can't hear it. That was when I had to get a new one.
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Old 05-07-2002, 02:54 PM   #4
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Univolt [converter] changes

Our univolt system is changed from the factory configuration. An aluminium box was fabricated for the univolt. A hole was made to allow the unit to hang from floor under trailer. This location allows more use of floor space, less transformer noise, and the unit operates cooler. The recessed box has a aluminium cover that prevents anything from entering box. The converter is controlled by a standard wall switch near the unit. All the dc voltage used in trailer can be sourced via the converter, the trailer batteries or power from the tow vehicle batteries. The trailer batteries can be used individually or together. The remote location of the converter reduces the output hummmmm considerably. The batteries are connected to a permanently installed digital voltmeter. A fully charged battery will indicate 12.6 on a digital meter. Frank
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Old 05-07-2002, 02:59 PM   #5
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Floor mounted converter Pic

Converter box in floor Frank
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Old 05-07-2002, 03:44 PM   #6
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I am curious if my post even registered.... Anyway..

Jim,
Is your new converter an old univolt type or is it a newer solid state type?
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Old 05-07-2002, 03:49 PM   #7
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Mine is really loud now. I had to buy a fan to drown out the humming...
Do the newer models protect the battery also??

Steve
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Old 05-07-2002, 05:45 PM   #8
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This is a nice little converter.
Inteli-Power 9100 55Amp
The additional charge wizard takes good care of your batteries.
No humming or buzzing, just the occasional cooling fan kicking in.
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Old 05-07-2002, 07:19 PM   #9
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I think my new converter is not the replacement univolt. From what I read, it has its own battery charging system that keeps the battery charged, but won't ever over charge it ( they say). When they finished the hook up, there isn't any amps reading on the meter in the control panel, which I liked. I think the unit that Inland RV ( Andy ) has on his web site is a closer to the one that came out of my unit. That unit lasted about 23 years, so I can't complain. The buzzing was louder than the new one & I think the battery charger is much better than the one in the old unit.
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Old 10-29-2002, 07:05 PM   #10
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Question ok?

Ok? how the ------------ are ya susposed to remove the box that is covered with carpet that covers the univolt I can't seem to find any screws or flanges are anything except for a million staples (furniture type) under the carpet. any ideas would be helpfull.
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Old 10-29-2002, 08:06 PM   #11
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Larry,
don't pull all the carpet of the box. It is screwed to the floor and to side via metal flanges. You may have to remove the decorative piece of vinyl to get to the screws.
PM or email me if you wish.
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Old 02-25-2003, 08:22 PM   #12
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what a deal!

Pulled out ole Mister Buzzy "Univolt" this last weekend and am awaiting my new 60 amp Intelli-Power converter, yes bigger than Peter's, with the "Charge Wizard". I was going to put a switch on it to turn it off so I could sleep but said the heck with it, it will be of better use as a boat anchor. I had an Intelli-Power in my Argosy and they are much quieter, all you hear is a little fan noise occasionally.

By the way, anyone want to guess how much a Univolt weighs? A correct guess will entitle you to a free working Univolt, a little noisy, but servicable. (shipping excluded, of course)

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Old 02-25-2003, 08:33 PM   #13
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Old 02-25-2003, 08:36 PM   #14
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Too high, mine is a 55 amp with the internal fuse block and if any of you wanna get closer, heck I'll even spot any of you 5 lbs. either way!

(I edited it and increased it to 5 lbs.)

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