Sorry, I am on Rick's login, but this is Ben. In Vantare lingo, MDP=Main Distribution Panel, which is the main electrical panel area always at the end of the Galley on Vantare coaches. There is no "reset", but rather, if it always reads FULL, there could be a bad sending unit (the pumping unit on the tank), or bad module in the MDP display unit. The sender in the bay on the output wire gives a 0-5vdc signal (empty to full, respectively), that the display needs calibrated to. To simulate empty, pull the air line off the sender in the bay, and it should read 0vdc, and with tank full, should give a 5vdc signal. Hope that helps narrow down the problem. Also, Headhunter Inc in Ft Lauderdale, FL is always very nice and supportive of there product, and you can buy repair parts directly if you so desire. Feel free to give me a call anytime, as sometimes it takes a while for me to get the time to check in on here. 813-830-8619.

Sincerely,
Ben
Coach Worx LLC