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[Number of flashes/Cause] Seventeen flashes: Printer detected ink out condition. [Action] 
Printer detected ink out condition (The lamp on the ink tank flashes). To avoid printing troubles such as the mixing of inks, this printer is designed to stop printing by flashing the Alarm lamp orange seventeen times when the remaining ink level in an ink tank goes under the amount of ink required to maintain both printer and print quality. Stop printing, replace the ink tank, and then print again. If multiple ink lamps are flashing, check how fast they flash. Fast flashing (at about one second interval) indicates the ink is empty. Slow flashing (at about three second interval) indicates ink is low.
The Meaning of Canon Printer Warning Light Flashes
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