I rang Sony myself n they say it is not a fan cleaning system at all its 4 when a disc should happen to get jammed in the console it will force it out damage may be caused too disc but ps3 wont be jammed i was not sure at first seen as tho it sounds like fans but they ensure it is 4 jammed discs and say it is fine an will not brake the PS3 even still tho when i did this with my ps3 it still kicked dust out so i guess it cleans it in a way so carnt complain
this only works with 40 gig and 80 gig ps3's n if u dnt belive me ring thm yourself an they will tell u its 4 jammed discs u will find the number on the back off all PS3 games