Epson WF-M21000 Series User Manual page 249

Solving Problems
There is a problem with the USB cable or the USB inlet.
Solutions
If the USB cable cannot be recognized, change the port, or change the USB cable.
The printer is connected to a SuperSpeed USB port.
Solutions
If you connect the printer to a SuperSpeed USB port using a USB 2.0 cable, a communication error may
occur on some computers. In this case, re-connect the printer using one of the following methods.
❏ Use a USB 3.0 cable.
❏ Connect to a Hi-Speed USB port on the computer.
❏ Connect to a SuperSpeed USB port other than the port that generated the communication error.
Cannot Scan Even Though a Connection has been Correctly Established (Windows)
Scanning at a high resolution over a network.
Try scanning at a lower resolution.
Cannot Start Scanning from Mac OS
Make sure the computer and the printer are connected correctly.
The cause and solution to the problem differ depending on whether or not they are connected.
Checking the Connection Status
Use EPSON Status Monitor to check the connection status for the computer and the printer.
1. Select System Preferences from the Apple menu > Printers & Scanners (or Print & Scan, Print & Fax), and
then select the printer.
2. Click Options & Supplies > Utility > Open Printer Utility.
3. Click EPSON Status Monitor.
When the remaining ink levels are displayed, a connection has been successfully established between the computer
and the printer.
Check the following if a connection has not been established.
❏ The printer is not recognized over a network connection
"Cannot connect to a Network" on page 250
❏ The printer is not recognized using a USB connection
"The Printer Cannot Connect by USB (Mac OS)" on page 239
Check the following if a connection has been established.
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The Printer Does Not Work as Expected
>
Cannot Start Scanning
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