I'll tell you what the Maintenance Manual says about this error:
"Indicates that an address ahs occurred when saving." "Check AC power supply and printer peripheral devices. Check whether the problem recurs. Even if there is no problem, switch on several times. Check the serial number. The main board assy may be damaged."
This info probably doesn't help much. I have never had this problem with my FOJ printer. I'd unplug the printer. Then flip the power switch a few times. Then plug it back in and try it again.