Fitch

Hi all, Just had this baaby a couple of weeks and am very happy with it.. except when I'm parked, having my lunch and listening to the radio, then... nothing. Everything switches off and "Econo-Mode comes" up on the little display. So I have to start the van for a second to get the radio back on.. Is there any way of switching the Econo-Mode off? I've looked up the owner's manual, but no help there..