Once the counter reaches a predetermined limit (usually around 95-100%), the printer will lock up and display:

The , often referred to as a "resetter," is a specialized service utility designed to resolve maintenance-related errors that stop your printer from functioning. While Epson printers are built for high-volume output, they contain internal safety mechanisms—most notably the waste ink pad counter —that eventually lock the machine to prevent ink leakage.

Click to see the current usage, then click Initialize to reset them to zero.