HP Designjet 510 Printer series - Manual (Page 60)

Ink cartridge replacement
The graphical sequence shows how to replace an ink cartridge.
WARNING: Make sure the printer wheels are locked (the brake lever is pressed down) to prevent the printer
from moving.
CAUTION: Remove an ink cartridge only if you are replacing it.
CAUTION: Do not replace cartridges while the printer is printing because doing this will cancel the current
print job.
You need to change cartridges either if prompted to do so on the front panel because the printer has detected a
cartridge is out of ink, or if the cartridge is low and you want to replace it before it runs out.