Support code pops up on the touch display of the printer and PC screen when errors happen. A "support code" is basically an error number, and shows up with an error message. Verify the support code whenever an error happens and go for the required action in response. This is simplest of all, regardless of what error it is, ☛ Turn off the printer and unplug it. ☛ Plug in the printer again and turn it back on. ☛ If this does not solve the problem, contact your nearest Canon service center to request a repair