Epson ColorWorks C3400-LT Technical Reference Guide - Page 30

Verifying the Ink Level The ink level can be verified using the Printer Status utility. When the ink level becomes low, and it is almost time to replace the ink cartridge, a message will be displayed onscreen. Prepare a new ink cartridge. When it becomes time to replace the ink cartridge, a message will be displayed onscreen and the product will stop printing. You will not be able to print until you install a new ink cartridge.  The ink cartridge that is shipped with the product is for initial ink charging. When an ink cartridge is installed for the first time (during setup), ink will be consumed for ink charging, and you will need to replace the ink cartridge earlier than usual.  The amount of ink consumed will vary depending on the use environment and use conditions of the product.  To preserve the quality of the print head, it will become time to replace the ink cartridge before the ink in the cartridge is completely used up.  The ink cartridge contains 3 colors of ink. Even when one particular color is specified, all 3 colors of ink are used for printing and for keeping the print head in good condition. When the ink level of even one color comes to the lowest limit, the product stops printing. Ink Cartridge Replacement Procedure See "Loading the Ink Cartridge" on page 47. The same procedure can be used for replacing the cartridge. Pull out and remove the used ink cartridge. For the ink cartridge model, see "Ink Cartridge" on page 211. 30