Duetto heater failure help please

On my 2007 Duetto both the gas water heater and the diesel heater have stopped working. I presume this is a power supply problem, but, as always with Autosleeper, the wiring is a mystery. I’ve checked the fuses under the driver’s seat and those under the side seat near the 2 heaters. All seem ok and have power supply.   Don’t know where else to look. Any advice please? We’re on holiday in foul weather.
Thanks.

What make and model of power control system do you have? Presumably the LEDs on the control panel for the heater (unknown make and model) and water heater (unknown make and model) no longer light up? Typically these would (I think) be supplied from the "Permanent 12V" supply, so that it stays on when the main control panel is turned off?

Not on mains then Will Eber work when engine is running? Best if able to carry a small fan heater and electric kettle as the onboard systems really need a basic understanding of how they function. All info on workings are on this site if you are able to use the Search facility 
frederic

frederic wrote:Not on mains then Will Eber work when engine is running?

Typically, as wired from the factory, I believe that an Eberspacher should operate with the engine running - that was true on my old Flair (which had a factory Hydronic unit) and is true of our current Trooper.