The printhead is stuck. Most of the time (in my experience as a tech) it's caused by spilled ink inside the printer. In any case, you will need a tech to either clean it out or re-align or repair the process drive.
I checked the 8560 Knowledge base using the link below and entered the fault code in the search field. It seems this is some kind of system or printer error and the solution is to power off the printer and contact support.