Clarion stereo displays ACCS - ***?

[Mattercraft]

The Clarion head unit cuts out and displays ACCS. Does anyone know what this is?
P.S. I've already tried resetting the microprocessor. That didn't do anything.

[Andyg]

Do you have a CD changer or anything else plugged into the DIN connector on the back? What Clarion deck is it?