Canon LBP7210Cdn Manual page 206

<Available>
<Replacement
Needed Soon>
<Replace Cartridge>
<Check Cartridge>
<Insert Cartridge>
[Features] Page
(1) Displays information about the maximum print speed, the total number of printed pages, etc.
Continue using as normal.
You can continue to print.
Have ready a new toner cartridge of the indicated color.
It is recommended that you replace the toner cartridge before printing a large amount
of data.
When the black toner cartridge has reached the end of its life, the printer stops
printing, and you cannot continue the job.
When any of the toner cartridges (other than black) has reached the end of its life,
you can print only in black and white.
Replace the toner cartridge of the indicated color with a new one.
The printer stops printing.
Toner cartridges with print quality that cannot be guaranteed or used toner cartridges
that have reached their lifetime may be inserted.
Continuing to use these cartridges may cause a malfunction, so replacing these
cartridges with new cartridges is recommended.
The printer stops printing.
Install the toner cartridges in the correct positions.