It isnt advisable to try and clean the air filter on this set because you could damage the light engine doing so
The filters are placed in awkward positions around the optical block and it is necesary to strip out the light engine to get at the filters the risk of damage by the untrained hand is high.If you wish to view whats involved yourself I could upload the service manual?
Warning of air filter clean is a message on screen
A technician should carry this out
Hope this helps
If you have further questions please ask