Hello, I am Sheldon and I am Epson customer executive.  Most users will have a 'offline' problem while using a printer at some point. Unfortunately, we do not know why 'Why Epson printer offline' occurs. It happens for one of these reasons. There is a problem with the connection between the Epson printer and the Computer. The printer is unable to communicate with the PCs due to hardware or software issues. An out-of-date printer driver may cause your printer to stop operating.