Canon ImageCLASS MF4690 Instructions Manual page 34

Using the Scan to USB Feature
If the scanned document is not stored:
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The error message on the display helps you determine the cause of the problem. For details on the
messages, see "LCD Messages, " (→ P. 0-) of Chapter 0, "Troubleshooting, " in the Reference
Guide.
When an error occurs, this machine prints out an error report that includes an error code. The code
helps you determine the cause of the problem. For details on the codes, see "Error Codes, "
(→ P. 0-2) of Chapter 0, "Troubleshooting, " in the Reference Guide.