Now to my problem and its solution:
My machine made after 9 months 'limp'. The coffee came only dribs and drabs, the brewing process took forever, and the cup was only half full. I thought of a warranty case and wanted to return it to the manufacturer of the machine. But first I called the DeLonghi hotline ...
Therefore my tip for all those who live in an area with very hard water and struggling with the same problem as me:
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By (. Competent but paid 0.14 / min) Hotline I got the following tip to produce a smooth coffee with respect again:
The brewing unit and the lines for brewing unit can not be reached by the normal descaling. In order to free the lines u. The brewing unit of the calcification, should fill about 0.5 liters of descaling liquid in the water tank and rinse 'provoking' by repeatedly turning on / off the machine.
After about 10 times, on / off (each with short breaks) everything was OK again. Repeated rinsing with clear water is not forgotten.
The coffee is now running as usual - thanks to the hotline.
I hope to have hereby the / who helped one or the other.
EDIT (28/10/2009)
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With the menu item 8 "cleaning" saves the on / off procedure described above.
So you go in 'one go'.