These cameras won't fire without film in them, unless you "fool" them by opening the back, turning the exposure counter dial with your thumb to past frame 1 and holding that dial in place, then closing the back, and releasing the frame counter. You can then wind and fire the shutter to your heart's content. This is covered in the manual; see it at the butkus.org site.

I have to admit I have no idea how the frame counter/shutter charging would work with pack film. Something tells me you'd need to follow the "fooling" procedure described above.