I had the same thing. On taking the machine apart I find the belt shredded around the motor shaft. ERR code apparently was 50 accoriding to the other half. It's a bit of a job to get to but I am very dissapointed with the lack of technical info.
As an engineer, I noticed that the belt jockey wheel can move some 6 mm which is totaly unacceptable.
Can I find anywhere to complain to Zanussi. This is a fundamental design fault and any engineer who would put there name to this design should be shot.
I will leave it to Zanussi to prove me wrong. If they have a spacer to limit the play in the wheel then where do you go to get that information.
Astoshingly bad customer support.
I will not buy Zanussi again.
I'm going back to Bosch.
Miffed Engineer
January 2008