f927eafa__Printer_Warning_Light_Flashes__Action
[Number of flashes/Cause] Twelve flashes: The paper is not loaded correctly in the Front Tray./The ink tank has been replaced during printing. [Action] 
When printing from the Front Tray: Press the RESUME/CANCEL button on the printer to clear the error, and then load the paper correctly in the Front Tray according to the procedure described in Loading Paper and try printing again. If the ink tank has been replaced during printing: Press the RESUME/CANCEL button on the printer to clear the error, then resume printing.
The Meaning of Canon Printer Warning Light Flashes
Action