When the counter reaches a pre-set limit (usually around 80-90% of the pad’s capacity), the printer displays a warning. When it hits 100%, you see:

Select the under the "Particular Adjustment Mode."

The (also called a "resetter") is the official service utility used to zero out these internal waste ink counters. Verified Reset Methods for Epson L6490

The process typically involves a few critical steps to ensure the reset is "verified" and successful: