Found an entry in a Dutch forum telleng me you need to replace the carbon-brushes or graphite-brushes.
For your reference:
http://www.klusidee.nl/Forum/about3655.html
I have the same problem on my 75700-W model and I'm going to do just that.
It seems an universal error-code on AEG machines.
Good luck!
Peter Schreutelkamp, December 2005