Hi Sparkin
To bleed the system do the following.. (from the manual)
With a 'cool' engine, top up the coolant through the radiator pressure cap (not the expansion tank cap). Allow the bike to tick-over and remove the bleed screw (see pic). Re-tighten this screw, and allow the bike to idle for another few minutes whilst propped up on its side-stand. Finally, top-up the expansion tank to the lower level mark.
(Have to say, the fan on my own bike never activates after the engine has been switched off. Mind you, I do live way oop north near the Arctic Circle (feels like it anyhow!)
Steve