Bosch washing machine WFK 2801 keeps stopping?

My Bosch washing machine WFK 2801 keeps stopping mid cycle for no apparent reason. No lights or error codes showing, as if the mains power had been turned off. Starting the machine again resumes the cycle from where it stopped but the machine stops again after a few minutes.
Also, does anyone know where i can get a list of error codes for this model.
I would be grateful for any help.