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Old 12-03-2010, 09:27 AM   #11
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If u disconnect the bat and plug into. Shore power, do the dc items still work. Lights furnace frig?
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Old 12-03-2010, 11:19 AM   #12
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Yes - the converter supplies the dc power. In fact, things like the lights run on 12V dc all the time, regardless of shore power or not.

...VTX-AL
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Old 12-03-2010, 06:57 PM   #13
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Instead of calling Best Converter, give Cheng USA Tech Support a call at
(574) 294-8997. They manufacture the WFCO converters. I had a problem with fitting a replacement board and the tech guy went way out of his way to get it fixed.
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Old 12-03-2010, 09:46 PM   #14
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Well I kept calling best converter today. The lady told me Randy was out of the office but she called him and had him call me. He seemed a bit irritated but loosened up a bit near the end of the conversation. I described my problem. He said I needed a new converter board and assured my it was simple to replace. I have yet to run upon anything I couldn't do in my 46 years so he's probably right. I'm still going to call WFCO Monday and go through the diagnostic steps to be certain. I hate that I bought a "never used" TT and am having to replace components. I guess it could have gotten a little lightning in its life setting in that metal bldg plugged in.
thanks for all the advice.
Maybe this is the problem.
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Old 12-04-2010, 10:37 AM   #15
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Quote:
Originally Posted by VTX Al View Post
Yes - the converter supplies the dc power. In fact, things like the lights run on 12V dc all the time, regardless of shore power or not.

...VTX-AL
if u know this with the battery disconnected, it sounds like the battery or the charging section. sense the converter doesn't throw the breaker until the battery it there, try a different battery and make sure of the polarity.

the bat and the converter both supply the 12v. if the converter is not working and ur plugged into shore power, the 12v still works. if u dissconnect the battery and plug into shore power and the 12v still works, ur converter section is working.

on my older trailer (84), the converter was switched in and out when u plug and unplug from shore power. the new ones are on with the battery (truned out that way on my 2002 is anyway). the switch on my converter turns the converter off...i don't think any part of it is active with the switch off. urs may not be turning off, that is why i ask abt the battery being disconnected and the shore power on. that is an easy way to prove the converter section is or is not working.
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Old 12-04-2010, 05:11 PM   #16
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Polarity is not a (big) problem on the newer converters. There are two 40 amp fuses that blow when the polarity is reversed. Nothing works after that; but after you change out the fuses and hook the battery up correctly you should be back in business.
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Old 12-04-2010, 06:12 PM   #17
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I can completely disconnect the battery and as long as shore power is plugged in the breaker trips.
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Old 12-04-2010, 11:29 PM   #18
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looks like u've isolated it to the converter. i'm still assuming that with the battery disconnected and shore power plugged in, u didn't have dc lighting.
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Old 12-05-2010, 12:15 AM   #19
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IF you can disconnect the 12V charge wire at the converter with the shore power off & reset breaker & try it with power on again. If the breaker holes. check your wire back to the batteries & if it trip it's the converter or AC hookup to converter.
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Old 12-06-2010, 04:38 PM   #20
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Well I got to the bottom of it today. While on the phone with the WFCO tech,we decided my MBA " main board assembly " was bad. Are at least it is now. He had me switching wires around, testing this and that. Lastly I changed hot wire to another breaker. Flipped breaker and said wooop. Tech said did it throw the breaker. I said no but I let the smoke out of a capacitor. He says, you have a bad converter board. He thought that all along but wanted to be sure. I always heard as long as the smoke stays in an electronic component it will work. But if you let the smoke out it stops working. It looks like $ 150.00 that wont go to Christmas gifts.
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