Compressor problem

Scania46

I have a Bauer Oceanus compressor, 9 years old, but not used very much.
I put in a new filter last April and since only used it twice. Today I could not get it to fill tanks. The pressure would go up to 240 bars, if I did not open the tanks, but not as fast as usual. When I tried to fill the tanks it was not able to, the pressure remained. the same.
I checked everything according to the book. No luck! No air sound to indicate pressure is escaping.

Could it be that the engine is running at to low rev? There seem to be a bit of play in the trotle, but I am worried in case I run it at to high rev.

Does any one know where I could get it serviced without getting fleeced.
A few years ago I asked for a price for service. The quote I got was 20% of the purchasing price of the whole compressor.

seadeuce

PM Sent