Epson WorkForce 40 Series - Manual (Page 23)

Replacing Ink Cartridges 23
10. Once you replace all the necessary cartridges, close the cartridge cover and
push it down until it clicks into place.
11. Close the printer cover.
12. Press the ink button to begin charging the ink. This takes about 2 1/2
minutes.
When the power light stops flashing and remains on, ink charging is
finished.
Caution:
Never turn off the printer while ink is charging or you’ll waste ink. If th
e ink light
flashes, press the ink button and press down all the cartridges securely.
Note:
If you remove a low or expended ink cartridge, you cannot reinstall and use the
cartridge.