Select the menu on the control panel as described below.
Settings > Supply Status
Supply Status
Ink Level
Displays the approximate levels of the ink cartridges. When is displayed, the ink cartridge is running low. When is displayed, the ink cartridge is expended.
You can replace ink cartridges from this screen.
Maintenance Box Service Life
Displays the approximate service life of the maintenance box. When is displayed, the maintenance box is nearly full. When is displayed, the maintenance box is full.
is displayed, the ink cartridge is running low. When 
is displayed, the ink cartridge is expended.