Oh dear ... not that one again.
As I may have said a few times before:- if nothing else, at least the PM schedule ensures that someone with half a brain comes into contact with each item of equipment on a more or less regular basis.
What do you want to do, Neil ... go back to the days of "don't call us, we'll call you"? If we waited until the users got around to reporting faults, half the kit would be junk before you even knew about it!
And ... what about electrical safety ... the biomed's
raison d'être? 
Adopt the ECRI terminology if it makes you feel better. That is:- "Inspection/Preventive Maintenance" (years ago we used to call them "Quarterly Inspections" anyway ... yes, quarterly). Even if it means simply wandering around the hospital (screwdriver at the ready) and "having a look"!
