CL display on LG intello washer?

I have an intello washer dd (silver) and for some reason on the green digital display it is showing CL. This came up seemingly as the last wash was complete. BUT I cannot get it off the display and no buttons that I press can reset the washer of make it work at all. I have even unplugged and the display remains as CL. Does anybody know why CL is showing and how to rectify the machine.