carver 240v switch

Can any one tell me where my carver cascade 2 ge 240v switch is on m 1994 Autosleeper trophy?
ive drained all water for winter 
when im on 240v hook up my heating just works so its switched on some where
now ive drained the system its going to fry my carver 
I still need the 240v hook up for my 240v portable heater

Have you looked in the cupboard where the distribution box is for the incoming a/c. Look for a switched mains socket that should be lit. Switch it off.

there is a switch there if I switch it off then the leisure battery doesn't charge so I assumed it was for the battery charger?

There should be another somewhere but AS do move locations so it could be anywhere.