Canon PRO-100S series Online Manual page 522

"Ink Error" An ink tank that was once empty is installed.
When the Alarm lamp flashes 13 times, refer to
"Hardware Error" The ink tank cannot be recognized. (The lamp on the ink tank is off.)
Replace the ink tank.
"Printer error" An error requiring servicing may have occurred.
Turn off the printer, and unplug the power cord of the printer from the power supply.
Plug the printer back in and turn the printer back on.
If the problem is not resolved, contact the service center.
Replacing an Ink Tank
1683 to resolve the error.
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