Printronix L5520 - Manual (Page 195)

Error Messages
195
4. For error number 02: If the error is caused by a paper-empty at
the lower sensor (Paper Near End Sensor), it is not necessary
to reprint.
5. Status message only: No operator action is required to clear
the message.
The Front Cover Open error can occur when either the Upper
Doors or the Paper Output Door is open. If the Upper Doors are
closed, push the Paper Output Door in to release it to its down
position.