You can check the approximate ink levels and the approximate service life of the maintenance box from the control panel or the computer.
You can continue printing while the ink low message is displayed. Replace the ink cartridges when required.
Select on the printer's control panel.
Access the printer driver window.
Click EPSON Status Monitor 3 on the Utility tab.
If EPSON Status Monitor 3 is disabled, click Speed and Progress on the Utility tab, and then clear Disable EPSON Status Monitor 3.
Select System Preferences from the Apple menu > Printers & Scanners (or Print & Scan, Print & Fax), and then select the printer.
Click Options & Supplies > Utility > Open Printer Utility.
Click EPSON Status Monitor.
It is Time to Replace the Ink Cartridges
It is Time to Replace the Maintenance Box