Every time you perform a print head cleaning or the printer auto-maintains, a small amount of ink is flushed through the head to unclog nozzles. This ink doesn't evaporate; it drips down onto the waste ink pad.
Epson L3150 "Service Required" error occurs when the printer's internal waste ink pad counter reaches its factory-set limit resetter adjustment program epson l3150
I see many people rushing to reset their L3150 when they see "Service Required." Quick reminder: Every time you perform a print head cleaning
Its primary function is to reset the Waste Ink Pad Counter to 0%. Maintenance Tools: resetter adjustment program epson l3150