How to reset Epson WF-3620, WF-3640 printers waste ink counter without using Adjustment Program
Usualy You can reset Waste Ink Pad Counters in Epson printers by using Adjustment Program or WIC Reset Utility. But this Epson WF-3620, WF-3640 printer models doesnt have built in waste ink counter. The counter is stored in the IC chip installed on separate Maintenance Cartridge (box). When it overflow - You have to replace it by new one with new IC chip.
The Maintenance Box stores ink that gets flushed from the system during print head cleaning. When the maintenance box is at the end of its service life, you need to replace it.........
http://www.2manuals.com/wf3620_waste.php