what is the edc light warning you about on ldv van?

My edc light has only just come on hence my web search, and found this site :). The van was left standing for several days over the cold xmas snow snap up in the Lakes. Came to start and defrost it and while it started fine (with a slightly sluggish, cold cold start reluctance) that pasky light was there. Its done 43k with original battery and has been trouble free. starts and runs fine with the warning light on. What is it telling me to check? Thanks in advance guys and galls. Neil