Epson C823781 - Net Print Server Administrator's Manual page 21

Status and Data lights
The print server has two lights (Status and Data), which indicate
the current operating status of the print server when you first turn
on the printer, during normal operation, and when errors occur.
The Status light has three colors (red, green, and orange). The Data
light is green.
The status lights indicate the print server status, as follows:
Status light
Red
Red flashing
Red Status light and green Data light
flashing alternately
Green
Green
Orange
Orange
Status sheet button
The first time you use the print server after installing or
reinstalling it, turn on the printer while holding down the status
sheet button for about ten seconds to initialize the print server.
The length of time needed to hold down the status sheet button
varies depending on the printer model.
Data light
On
On
On
Flashing
On
Flashing
Print server status
Initializing
Error status
Firmware update mode
Ready (10M link)
Receiving packets (10M link)
Ready (100M link)
Receiving packets (100M link)
Introduction
9