The problem with the ET-4800 (and many inkjets) is that during cleaning cycles, the printer spits ink into these pads to prevent clogging. Eventually, Epson claims they are saturated and could leak ink all over your desk. It’s a safety feature, sure, but it’s also a planned obsolescence time bomb.

If you only reset the counter without replacing the box, the printer will continue counting from zero, but the old pad will eventually overflow and ruin the printer.

If you see and you have already replaced the maintenance box, this refers to a different internal pad (the ink absorption pad under the print head). That error requires Epson service or third-party repair with a reset utility. The ET-4800 rarely triggers this unless the printer has been heavily abused or leaked.