Epson WF-3720 Series User Manual page 231

7. Insert the new cartridge into the holder and push it down until it clicks into place.
8. Lower the scanner unit, and select Completed on the LCD screen if necessary.
The print head moves to its home position and the printer starts charging the ink. This takes about
90 seconds. When you see a confirmation message on the screen, ink charging is finished.
Caution: Never turn off the product while the power light is flashing or you will waste ink.
If you see an error screen telling you an ink cartridge is installed incorrectly, lift up the scanner unit
and press the ink cartridge down until it clicks into place. When you're finished, select OK.
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