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Old 08-31-2015, 06:22 AM   #1
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1st electrical issue

After three months my back is well enough for us to go out last week end. This is the longest this unit has ever set. Over memorial day the battery went bad 6 years old was time. but it did boil dry. Fast forward. Had a electrical small coming out of a light switch, and not hot water either electric or gas. went a bought a new switch, and circuit board installed both. No change. Replace the new board with the old board. about 45 minutes the over head lights suddenly came on tried the hot water heater works on gas only. after a little while got a electrical smell coming from the area of the fuse box.,, All Fuses are good no breakers are thrown. Turned off the over head lamps smell went away. Is it possible the battery took out the inverter also , and this is causing the problems
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Old 08-31-2015, 06:30 AM   #2
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Frank, I don't think you have an inverter. I believe you mean converter don't you?
Did you check to see if it was putting any charge to the battery?
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Old 08-31-2015, 06:36 AM   #3
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Yes seems to
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Old 08-31-2015, 07:39 AM   #4
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I know that you are an old hand at this, but have you checked to make sure you didn't accidently hook the battery up backwards?
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Old 08-31-2015, 08:29 AM   #5
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Check three times, but will check once more
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Old 08-31-2015, 09:56 AM   #6
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Sounds to me that on/after the memorial day event, the converter put out high voltage trying to charge a dead battery. When that happened, it might have "fried" some electrical connections, (usually at wire nuts) giving you those electrical "smells." Triple-check the battery connections, then open/inspect every 12v electrical connector you can find.
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Old 08-31-2015, 11:27 AM   #7
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Hope you find your issue and it will be an easy fix. In case you end up needing a new board, Here is the cheapest I found when I thought my converter was bad.
WFCO WF8955MBA WF-8955MBA 55 Amp RV Trailer Power Center Main Board Assembly Camper Trailer RV

Also good to hear your back is on the mend and getting better.
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Old 08-31-2015, 04:55 PM   #8
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Frank,

It is possible the converter has failed. If it is on a dedicated breaker, then turn the converter off. If it shares a breaker, then still shut it off( but realize that some other 110V appliance will also be shut off). Make sure the battery is good and fully charged, then hook up a good automotive battery charger directly to the battery terminals. Now check operation of all the 12V circuits, one at a time.

While usually a bad converter will put out too little voltage, I have seen a converter fail and put out as much as 24V DC. Either case will cause havoc with all of the 12 V circuits and the new battery as well. And since the control boards for the air conditioner, water heater, etc are all 12V, even 110V appliances will be affected.
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Old 08-31-2015, 08:02 PM   #9
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Another method at looking at the output of the converter is to check the voltage while it should be charging the battery. If you have a good digital meter also switch it to AC and check the voltage again. You should have very little AC ripple. If you see over a 1/2 of a volt there are bad capacitors and possibly diodes failing in the converter.
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Old 08-31-2015, 09:54 PM   #10
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My converter was pulled out to check out on the work bench. The reason why my 12 volts lamps barely glowed and flickered. Testing 12 volts. Yep I had it but as soon as you put a load on it nope. It was bad. My desision was toss my wefco and put a 50 amp boon docker converter in. Made in USA 3 year warrenty .
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