Upper platen stops moving and controller displays error message

Follow directions on the controller display
Turn the main power to the grill OFF, wait for one (1) minute, and then turn main power back ON.
Clear grill surface of any item that may be touched by the platen when it is moving (example: chicken ring)
Any tool touching or contact with the platen while it is moving can make it stop.
If the steps above do not resolve the issue, call for service.