Addendum: After 2 months my first Air Floss was broken. Instead of a shower just shut up I immediately can mitduschen my face, because the nozzle has been completely pushed out by the pressure. The conversion went smoothly and I got a new one. After almost exactly the same time in the application I had the same mistake with the second Air Floss. Again Exchange, thanks to Amazon this time without any problems. Now I have the 3rd Air Floss since 01.08.2014 in Uses- far without error, toi, toi, toi. Let's see how it goes.
With so many error messages of all customers should be the model Philips denkenn over and revise. If this goes on, the Philips Sonicare HX8211 / 02 Air Floss, despite the good cleaning, not worth the price and no longer recommended.