You can reset Epson ME-520 waste ink pad issue messages with WICReset tool. Wicreset help you reset Epson ME-520's waste ink counter error messages.
Epson ME-520 printer Waste ink error messages?
Epson ME-520 printer error has occured
Epson ME-520 printer ink pads are at the end of their service life. Please contact Epson support Waste ink pad in the printer is saturated
Epson ME-520 waste ink counter overflow messages