Help please!

Fuses?  Trip switch? 

About all you can do is to check whether the main breaker on your van’s panel has tripped. An earth fault will cause the breaker to trip but sometimes a power surge can cause a sensitive breaker to trip.

 Very occasionally a hook-up cable can be faulty but it is far more likely to be your control panel. Your dealer should be able to talk you through what to check and possibly avoid a visit.

Good luck!

I agree with Hitch, first port of call must be the main breaker. I think Rapido ise CBE electrical items, as does my own van.

we have the main 'box' in the rear garage and there are a number of 'trips' there.

id start there.

Did you have mains electricity at one point? Some CMC sites have push in and twist connectors. How did you check the hook up point? 

At home, are you connecting to mains electric?

My electric icon disappears when I'm not connected (Hymer). Have you read the manual to ensure you are following the right procedures? If you have a Truma electric/gas boiler, you should get a warning light on the Truma panel if a problem exists with the heater.

If you're happy with the above, then follow the advice already given.