Problem using sublimation inks

Since you are using sublmation ink, the cartridges are probably aftermarket and may not meet Epson standards. Aftermarket chipped cartridges are notorious for failing to 'communicate' with Epson printers, even when the cartridge is brand new. Before taking the printer to a service center, you might try purchasing new cartridges of your ink from your reseller. If that fixes the problem then your fight is with the ink reseller, not Epson. If it doesn't fix the problem and your printer is still under warranty, take it to an authorized service center, and remember, using non-Epson ink does NOT void the waranty.