On my refrigerator there's an LCD display that give you the temperature of the freezer, the refrigerator and a few other things. The little ice cube tells you the ice maker is on and the bell tells you the 30 second bell warning system is activated if you leave the door open too long. There's one above the ice cube that lights up with a little wrench telling you that there's a problem with the refrigeration system. Today though, a strange one showed up above the bell, here's a photo.

Anyone know what it means? I can't even figure out what it's supposed to be a picture of...