zanussi FJS1425W Error code E51?

First off I had the E20 error - washer could not drain etc. found the pump was faulty. I replaced the pump and powered on, now the machine has just locked up completely and just flashes, even the door lock light is on and the door cannot be opened. When I reset the machine I gives the E51 error. I have made sure the unit has been drained completely.

I found some info on the E51 code here

http://www.howtomendit.com/answers.php?id=45656

....does this mean I am completely screwed or can this be fixed easily?

Thanks for any help anyone can provide