Error Message Cause Action
Too many bins
Either bin 2 tray or bin 4 tray was
removed from the Mailbox unit.
To use the Mailbox unit in 2-bin mode, remove
both bin 2 tray and bin 4 tray.
To use the Mailbox unit in 4-bin mode, install
both bin 2 tray and bin 4 tray.
Too Many Trays
The number of installed Optional
Trays exceeds the maximum
number.
Reduce the number of Optional Trays.
Unusable Device
An unsupported USB device has
been connected to the USB host
connector.
Unplug the device from the USB host
connector.
Related Information
• Troubleshooting
• Replace Supplies
• Load and Print Using the Paper Tray
• Load and Print Using the Multi‑purpose Tray (MP Tray)
• Replace the Drum Unit
• Clean the Corona Wire
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