Epson 802.11g Reference Manual page 279

Ink replacement utility
If the printer or all-in-one is connected directly to the computer,
the Ink Replacement Utility dialog box appears when the ink has
run out. When you click the OK button, the print head moves to
the ink cartridge replacement position. On the other hand, if the
printer or all-in-one is connected to the wireless LAN, you need
to press the button on the printer or all-in-one to move the print
head. Follow the on-screen instructions to replace the ink
cartridge.
Connected to the computer directly
Connected to the wireless LAN
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