Exactly what do you mean by "Reset the control board"?
Check out these:
http://www.diynot.com/diy/threads/what-dose-error-code-e90-mean-on-a-zanussi-washing-machine.146525/
http://www.justanswer.com/uk-appliance/2191e-zanussi-1400-jet-system-fjr-1454w-showing-error-90.html
Never Assume. It makes an ASS out of U and ME, December 2015