Canon PRO-300 Ink Absorber Full Reset

When Canon PRO-300 triggers an ink absorber full condition, the printer may block printing as a protective measure. The solution is typically a waste ink counter reset.

During head cleaning, surplus ink is routed to internal absorber pads. Canon PRO-300 monitors this via a counter and can lock printing at a threshold.

This page is prepared for Canon PRO-300. Service mode instructions are shown only when a matching series procedure is known.

Common Symptoms

• Service / maintenance warning on the screen or driver
• Printer refuses to print even with ink available
• Blinking lights and queued jobs fail
• Error reappears after restart

How to Enter Service Mode on Canon PRO-300

If your Canon PRO-300 supports service mode reset, follow the steps below before performing the counter reset.

1. Turn the printer OFF.
2. Press and hold Stop/Reset.
3. While holding Stop/Reset, press and hold Power.
4. Release Stop/Reset (keep holding Power).
5. Press Stop/Reset 6 times.
6. Release Power — the printer should enter service mode.

If it doesn’t work, repeat the sequence carefully. The press count depends on the series.

Clear the Ink Absorber / Waste Ink Counter

Completing the reset clears the internal ink absorber counter stored in printer memory and restores normal operation.

Maintenance Reminder

If absorber pads are truly saturated, ignoring maintenance can lead to ink leakage inside the printer. The counter reset only removes the software lock.

Download & get started

If your model does not show a service mode section, it means no matching procedure was found for its series.

If It Doesn’t Work

• Repeat the service mode steps carefully (timing matters).
• Use the correct Stop/Reset press count for your series.
• Close other Canon printer utilities while resetting.
• Power-cycle the printer and try again.
• Try a different USB cable/port if using PC software.

FAQ