Hi, we have bought a fabulous Adria 2009 542 DT in excellent condition and collected it yesterday from a very reputable dealer, we have put the heating on tonight to accommodate my son and daughter in law for one night on a 240 hook up on our drive and after 15 minutes it trips out. It is a Truma Ultraheat system, and I will go back to the dealer in the morning, but is it something we are doing wrong as I’d like to keep them warm tonight if I can?