It's not working right. Replace it with a modern one, which will also do a much more effective job of charging and do less damage to the battery as well. You will be much better off all around.
If it has an integrated 120v & 12v power center, you can disconnect the converter portion and install a standalone converter/charger.
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Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
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