I own a 2015 Discovery 37R. Replaced the house batteries (6) after drawing them down completely while it was in storage.  House battery voltage is correct with new batteries, however, the faulty battery light on the master panel remains on (red) indicating discharged batteries. Can't find any information in the manuals about this situation.  Tried holding down the on/off switch to reset it.  After several seconds, it turns green, but then it quickly turns red again.  Before I take it to a maintenance facility (140 miles away), does anyone have any advice/knowledge about this? 

Thank you for the information James.  Didn't know that DOAI existed! 

Occasionally when I start my 2016 Excursion, I get a low voltage warning on the dash and the Energy Monitor panel.  Rig always starts fine and the warning then goes away.  Check with the National Service center people and they say that is a misleading warning caused by the power pull when starting the rig.  When it happens, the batteries are fully charged.  So a warning of a problem that does not exist.