Canon BJC 3000 Reference Manual page 141

Note You can print a nozzle check pattern with the print driver or with the
RESUME button on the printer. To print the nozzle check pattern with the
button, press and hold down the RESUME button until the POWER lamp
flashes twice, and release it.
4
When a confirmation message appears, make sure that paper is loaded in
the printer and the printer is switched on.
5
Click the OK button.
Printing a Nozzle Check Pattern
Routine Maintenance 141