I don't know if I've replied to this before - dunno where to find answers. Anyway, short answer is: I called in a local guy when mine did this. The code means leaking water is collecting on the baseplate. He checked inside and found no leak, and advised me to really clean the rather encrusted door seal. I did that and haven't had the problem since. Before you try it, tip your machine on it's side and watch out for water coming out. There shouldn't be much - a couple of old towels should get it.
Roy Butterfield, October 2010