Epson Stylus Pro 4000 Reference Manual page 271

8. After removing the ink cartridges from the right ink
compartment, LOWER THE RIGHT INK LEVER is displayed on
the LCD. Lower the ink lever on the right.
9. The printer starts draining ink, and DRAINING XX% is
displayed on the LCD. Wait until draining is complete.
10. When draining is complete, RAISE THE RIGHT INK LEVER is
displayed on the LCD. Raise the ink lever on the right.
Maintenance and Transportation
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