What year is the van? there are three 2000 models!!
The 2000 Fanmaster manual on my website only refers to the later 1998-2000 model, normally this one has a slide switch control on the top of the fire front, other than that download the Fanmaster mk1 manual.
No button to reset on the later one either, if it does trip out then you need to switch it off at the mains switch and wait five minutes before switching back on.
Also check the 'kettle plug' mains connection on the back of the fire has not fell out? it's in top right hand corner and you'll need to feel right over the back for it.
Heres a picture of where the reset switch is on the earlier model mk1 Fanmaster
www.arcsystems.biz/Pictures/Fanmasterreset.jpg