RTFM
Easily downloadable frm the Bosch (that's bosCh) website.
http://www.bosch-home.co.uk/download-instruction-manuals.html
E29 is lack of water supply/water pressure too low
Chewck the feed pipe for kinks, properly open taps and also check the inlet filter wher ethe pipe joins the appliance.
RTFM
Did I say RTFM?
December 2015