That is the model number on the job and it also appears on CDSL in the Daewoo fridge freezer section as well, I assume it is a special for John Lewis, On the job notes it says that the filter light is continuously flashing, is this just a timed alarm to change the filter and if so how is it reset?
had a look at the service manuals i have and they all say the same green for 6 months then red, no mention of it flashing, most of the daewoos have a reset filter button, hold for 3 secs, 1 or 2 models it is the child lock button that resets the filter timer.