The Power Ink Flushing utility allows you to replace all of the ink inside the ink tubes. In the following situations, you may need to use this feature to improve the print quality.
You printed or performed head cleaning when the ink levels were too low to be seen in the ink tank windows.
You performed the nozzle check and Cleaning three times or the Power Cleaning once, aited for at least 12 hours without printing, performed the Cleaning again, but all nozzle check lines are still not printed completely.
Before running this process, read the following instructions.
Make sure that there is enough ink in the ink tanks.
Visually confirm that all ink tanks are at least a third full. Low ink levels during Power Ink Flushing could damage the product.
Ink will be deposited in the maintenance box. If the maintenance box becomes full, you must prepare and install a replacement maintenance box to continue printing.
When the ink levels or the free space in the maintenance box are insufficient for Power Ink Flushing, you cannot run this process. Even in this case, there may be enough ink and free space in the maintenance box to continue printing.
Select More on the printer's control panel.
To select an item, use the 
buttons, and then press the OK button.
Select Maintenance > Power Ink Flushing.
Follow the on-screen instructions to run the Power Ink Flushing.
If you cannot run this utility, solve the problems that are displayed on the screen. Next, repeat the process from step 1.
After running the Power Ink Flushing, run the nozzle check to make sure the nozzles are not clogged.
For details on how to run the nozzle check, see the related information link below.
If all nozzle check lines are still not printed completely after running Power Ink Flushing, contact Epson support.
You can also run Power Ink Flushing from the printer driver.
Windows
Click Maintenance on the Maintenance tab, and then select Power Ink Flushing.
Mac OS
Apple menu > System Preferences (or System Settings) > Printers & Scanners (or Print & Scan, Print & Fax) > Epson(XXXX) > Options & Supplies > Utility > Open Printer Utility > Power Ink Flushing