Canon imagePROGRAF PRO-2000 Online Manual page 839

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Cause
The remaining level of the ink cannot be correctly detected.
What to Do
Replace the ink tank. Printing will restart.
Replacing Ink Tanks
An ink tank that was once empty is installed.
If you want to continue printing, you need to disable the function for detecting the remaining ink level.
To disable this function, press and hold the printer's Stop button for at least 5 seconds, and then release
it.
By this operation, the fact that you have disabled the function for detecting the remaining ink level will be
memorized.
Please be advised that Canon shall not be liable for any malfunction or trouble caused by continuation of
printing under the ink out condition or by using refilled ink tanks.
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