Yes, it voids your warranty. If your printer is under 1 year old, do not use an adjustment program. Epson’s service center can detect that the counter was reset (they check the EEPROM logs). Only use a resetter on out-of-warranty printers.
To ensure a smooth reset process without errors or communication failures, follow these preparation steps:
Epson L4150, L4160, and L4170 Resetter Adjustment Program: The Ultimate Guide
If you reset the counter multiple times without addressing the physical ink buildup, the waste ink will eventually overflow out of the bottom of the printer casing, ruining your furniture or short-circuiting the internal electronic boards.
Waste Ink Pad Counter Error (Main/Platen Pad).