Canon PRO-10 Series Manual page 811

"Ink Error"
"Hardware Error"
If you want to cancel printing, press the printer's
RESUME/CANCEL button.
Replacing an Ink Tank
Check the number of how many the Alarm lamp flashes and
take the appropriate action to resolve the error.
Alarm Lamp Flashes Orange
The ink tank cannot be recognized. (The lamp on the ink tank
is off.)
Replace the ink tank.
Replacing an Ink Tank
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