Here is a source for the schematic and other manuals...

http://www.jollinger.com/photo/cam-c...s/manuals.html

Sounds like the head is tripping the GFI, either throwing a spike or a dead short. Check the head for shorts in the plug, the fan, the lamp.

And yes try it in a regular non-GFI outlet.

I hope you'll let us know how this turns out?