Epson AcuLaser MX20DNF User Manual
Page 184
Unable to Transmit Fax
A fax communication error occurred during transmission. Wait for a few minutes and try again. Also
make sure that the fax number is correct.
Unsupported USB Device xxx
Unsupported USB device is connected.
USB Memory Error
The USB memory may be corrupted or incorrect. Replace it with a new one.
USB Memory Full
There is no space available on the USB memory connected to the printer. Delete data from the USB
memory to create free space, or use a different USB memory.
USB Memory Not Connected
A USB memory is not connected to the printer. Connect a USB memory to the USB Host interface.
USB Memory Write Error
Saving data to the USB memory failed.
USB Memory Write Protect
Unable to save the data to the USB memory. Check that the USB memory connected to the printer is
not read-only.
Using Fax Tool
A computer on a network is accessing fax-related information. Wait for a few minutes, and then try
again.
Using Phone
The external telephone connected to the printer is being used.
Wait for a while and try again
Epson AcuLaser MX21/MX20 Series User's Guide
Using the Control Panel 184