Epson Stylus Pro 4000 Reference Manual page 267

6. Hold the ink cartridge with the arrow on the left side and
pointing to the rear of the printer, and insert it into the slot.
Do not force the cartridge in further by hand.
Note:
If the Ink check light remains on, the ink cartridge may not be
installed correctly. Remove the ink cartridge and then reinsert it as
described above.
7. Lower the ink lever to the secured position.
Note:
If you install a ink cartridge to wrong slot, NO INK CARTRIDGE
appears on the LCD. Make sure that the correct ink cartridge has
been installed in the correct slot.
Maintenance and Transportation
6
6
6
6
6
6
6
6
6
6
6
6
267