Zanussi WJS1665W Washer Dryer - Error Code E52 - help?

I am running the Engineers Diagnostic mode & gtting this error code - E52.

I have seen that this may be "no signal from tachometric generator - cyle blocked with door closed".

Does anyone know what this means and more importantly is it possible for me to fix it?

I have seen that it may be a motor fault but could well be the main circuit board....

Any help would be gratefully received.

Thanks.