6 replies to this topic

[morphingstar]

Hi,
My Travelaire c-class on Ford was built around 1978. I recently discovered that the 12 volt DC line goes up to 16 ... 18 volts.

There is obviously a basic wiring error in the system else it could not happen. = poor installation practice.

It might help me very much if I could get a diagram of the power system, to figure out where the 12 vdc leads are supposed to go, then discover which one is loose somewhere. The loose one messes up voltage regulation, I suppose.

115 vac is ok.

thanks.


Similar, but different: I had to rewire the Onan 4kw generator control circuit as wires were bad there too. Comparably easy, only 5 wires from panel to Onan.

Does this forum have a library of documents? I made a circuit diagram of my Onan control, not a copy of the © manual.

[wolfe10]

Welcome to the Forum.

Does this high 12 VDC voltage occur when you are plugged in or when running the engine? Or both times?

That will tell you if you have a converter problem or alternator/regulator problem.

Assume you have verified the voltage with a digital voltmeter.

Let us know and we can go from there-- I don't suspect a "basic wiring problem"-- at least that would be well down the list.

And, if that high voltage has been present very long, the batteries are certainly low on water and may be ruined. Check water level and also check to see if the sides are swollen.

Brett

[morphingstar]

Supply is 115 vac. Engine is off.

RV battery is 13 - 14 volts. I don't know whether it is dry. The Battery is 6 month old, deep cycle.
The described effect itself seems new to me, it is not stable*, indicating bad contact somewhere. I did not notice it =>6 month ago.

If Travelaire was wired correctly by mfg how could the distributed voltage at the interior lights be higher than the battery's voltage?

*Not stable: Sometime the voltage is higher than the battery, sometimes it is <= . The latter would indicate proper conditions at the time.

Is there a source for diagrams / schematics ?

Thanks for the welcome .. :-)

[wolfe10]

Hopefully, someone will contact you with wiring diagrams. Have you searched for a Trevelaire owners group-- many RV brands have a brand specific technical site made up of owners.

Please tell us what converter you have. Some of these older ones separately charged batteries (poorly) and provided separate 12 VDC (actually around 13.5 VDC) to the house.

So, on the face of it, the converter would be my first "suspect".

The converter is the only device that could possibly boost voltage to the house above that at the battery.

And lastly, have you checked the water level in your batteries-- overcharging boils the water out!

[morphingstar]

Travelaire owners group - I had no idea such groups exist.
Convertor data attached, in *.zip. Allanson, D30 BRA-E.
Battery water level - negative, I have to figure out whether the battery can be opened without damage.


allanson convertor MH TA.zip


Done (uploaded 182.40 KB)
Add to Post | Delete

should I add a zipfile to post?

Attached File(s)

•  allanson convertor MH TA.zip (182.4K)
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[wolfe10]

From your post of the converter information, it clearly states that it has separate circuits for battery charging (5 amps) and the house 12 VDC appliances (30 amps).

So, if it is malfunctioning, you it is possible you could get different (and excessive) voltage on one but not the other-- these are older than I have personally worked with.

There are a number of excellent replacements out there.

Brett

[morphingstar]

<p>

Quote

There are a number of excellent replacements out there.

</p>
<p>Well, I have not met one single RV repair place between El Paso and Guerrero (Mx). I had to import pipes and more for waste tank.</p>
<p> </p>
<p>So if you know a source in TX it might be the best having one unit shipped from there.</p>
<p> </p>
<p>Also I would need some guidance / assistance with selecting the correct replacement. The data on the label is low.</p>
<p>To connect a replacement I need to know what is what on connectors.</p>
<p> </p>
<p>thanks</p>
<p>__</p>
<p>I did a search on the internet for the Travelaire Owners Group. Here is what I found:</p>
<p> </p>
<p> </p>
<p><strong> <a class="bbc_url" href="http://community.fmca.com/topic/3747-internal-120-v-power-system-diagram-travelaire/" title="">Internal 120 V Power System Diagram - <strong>Travelaire</strong> - FMCA ...</a> <img src="https://ixquick.com/s/white/graphics/star.gif" /> </strong></p>
<p> </p>
<p>Welcome to one of the friendliest and most informative motorhome support ... <strong>Travelaire</strong> <strong>owners</strong> <strong>group</strong> - I had no idea such groups exist. Convertor data attached, in *.zip.</p>
<p>community.fmca.com/ topic/ 3747-internal-120-v-power-system-diagram-<strong>travelaire</strong>/ - <a class="bbc_url" href="https://s3-us2.ixquick-proxy.com/do/proxy?ep=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&amp;epile=4q6n41784q6n417n4q4449774r4638344q7935725n586o3q&amp;edata=e421193465266c3c82051c2ed3359854" rel="nofollow external" title="External link">Proxy</a> - <a class="bbc_url" href="https://us2.ixquick-proxy.com/do/highlight.pl?l=english&amp;c=hf&amp;cat=web&amp;q=Travelaire+motor+home+owners+group&amp;rl=NONE&amp;rid=LCLNNKQQLKTK&amp;hlq=http://ixquick.com/do/search&amp;mtlanguage=english&amp;mtpl=ff&amp;mtcat=web&amp;u=http:%2F%2Fcommunity.fmca.com%2Ftopic%2F3747-internal-120-v-power-system-diagram-travelaire%2F" title="">Highlight</a></p>
<p> </p>
<p>:-)</p>
<p> </p>
<p>Then: I am away from home computer. I tried to download my *.zip file about allanson, several times.</p>
<p>All I receive is &quot;index.php&quot;.</p>
<p>___</p>
<p> </p>
<p>I found on the internet this thread about replacement:</p>
<p> </p>
<p><a href="http://www.fiberglassrv.com/forums/f56/adding-a-new-converter-25862.html">http://www.fiberglassrv.com/forums/f56/adding-a-new-converter-25862.html</a></p>
<p> </p>
<p><a href="http://home.comcast.net/~rabarber/magnetek.htm">http://home.comcast.net/~rabarber/magnetek.htm</a></p>
<p><a href="http://www.bestconverter.com/MagnetekParallax-to-PDI-or-Iota_ep_13-1.html">http://www.bestconverter.com/MagnetekParallax-to-PDI-or-Iota_ep_13-1.html</a></p>
<p><a href="http://www.allanson.com/">http://www.allanson.com/</a></p>
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<h1>
Search Results for <span>Allanson, D30 BRA-E.</span></h1>
<p>Sorry, no posts matched your criteria. Allanson's response !</p>
<p> </p>
<p>Allanson International Inc.<br />
33 Cranfield Road<br />
Toronto, ON M4B 3H2 Canada</p>
<p>Tel: 1 (800) 668 9162<br />
Fax: (416) 752 6717</p>
<p> </p>
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