As Dave says, you normally get the LED to light up for about 4-5 secs at first, but as John has mentioned and i have witnessed, this sometimes does not happen..
So .. after the 5 short flashes ... do you get a 10 ? and then some more short flashes to register another code ? if so i would go for a CODE 05 and then work from there on the flashes and see what you can make out..
and i know you have enough 6's there to nick a knock sensor off
Plus if its a runner Del, and its new to you, maybe reseting the codes and taking it for a spin could be a good idea. Some of the codes could be old and have been rectified without the ECU being reset.
Paul.