HP DesignJet Series - Errors vs. Warnings

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System Error Codes
HP Designjet Ultra Low End Printer Service Manual
Errors and Warnings
Error Codes will normally be displayed directly on the front panel (but can
also be seen on the Information Page) and will require some kind of
intervention to resolve the problem. Warnings will not be displayed on the
front panel, but will instead only appear on the Information Page, therefore
allowing the user to continue operating the printer without the need of an
intervention.
You can also obtain report of the System Error and Warnings
through the DesignJet System Maintenance Tool.
System Errors
Warnings