Epson STYLUS RX500 - Manual (Page 76)

76 Replacing Ink Cartridges
9. Close the scanner unit.
The print head moves to its home position, and ink charging
begins. When Charging... appears on the LCD panel when ink
charging is in progress. Charging... disappears from the LCD
panel, ink charging is completed.
c
Caution:
Never turn off this product while Charging... appears on the
LCD panel; Otherwise, this will cause incomplete charging of
the ink.
Note:
If you install a used ink cartridge with ink level already low, it may
become empty right after the replacement. In this case, replace the ink
cartridge with a new one.