Control panel of leisure battery dead

‘

Sorry for terse headline , pressed send too early ! 

My ec700 control panel is completely dead , last time I used the van was when I had to take it to Peugeot for a recall to fix a problem on adblue messages. I then pumped up the rear suspension with a 12 volt air compressor whilst van was running . All fine , today panel completely blank . Any thoughts on this problem, was aforementioned tasks anything to do with it . Replies much appreciated. Many thanks

Have you tried the troubleshooting guides in the user manuals?

Good idea , I’m also going to ring Sargent today as I find them very helpful as well .

Does the panel work if the 12v Hab battery is flat or does it also draw power from the starter battery ?

No it doesn’t work in those circumstances

Have you checked the hab battery voltage with a multimeter, I have managed to leave a light on nefore in the old van and totally flatten the battery

first check if the battery has any power
what battery is fitted
if you have the battery I think you have got will cut all power if its low on power ref below a % in power
this is a case of starting the basic checks first before any more help can be given

Phoned Sargent this morning , problem solved , it was the 12 volt air 
Compressor that blew the electrics and completely discharged the leisure battery . We had to change the vehicle battery fuse and put in a 30 size one and he advised us to put it on hook up overnight in order to sufficiently charge both batteries . 
We used the air compressor on the 18th of August and he could see on his system that the leisure battery was discharged by the 25th of August.   He said it’s a common problem using those 12 volt air compressors.