Hello, I have a dolgent problem: Vario 816, year 2007 with pneumatically supported hydraulic brake… The directly coupled air presser starts around every 60 seconds (and then compacts about 10 seconds) – even if I only roll without braking. ! It is a combined controller/dryer from KNORR, type LA 8201 – so with separate regeneration pressure tank (see pneumatic schematic). So the presser starts up, builds up the pressure of about 10 bar and then switches on with Ent a relatively loud hissing – and then it continues to soak from the silencer until the presser starts again at a good 9 bar. That means that the air is now taken out of the operating system after the regeneration tank has been blown off, right? I have built in a similar (used) controller/dryer – but it is exactly the same thing… It makes absolutely no sense that the Re-Dryer is not the same. This happens only if the engine is running and even if I don’t brake! In the case of the standing vehicle (whether with or without the hand brake), there is almost no pressure loss after 1 day: Therefore, all components are probably sealed. What changes in the pressure-carrying system if the engine runs against the engine down??? Is this possible?? What do you have? Vario driver for an impression? How is that with you? Greetings