I don't know your coach or which specific version multiplex system the Aria uses but you could try Youtube for some good videos on the various systems. I am attaching one video that may apply, but as with many things there are probably a variety of versions out there. About half way through the video they finally get into the DC battery settings and in fact they do show that (with this version at least) you can control the type of charge being applied to the batteries. If this does not look like your version I am sure someone else will comment with more specifics; or do some youtube trolling.....or Firefly web site trolling to get your specifics. It is a system for folks who like to play with buttons....no doubt about it.
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