Intermec EasyCoder PD4 Programmer's Reference Manual page 155

A
Error-Handling
This appendix explains the principles of error handling
and lists the various error types and all possible error
replies that the printer can return to the host via an
RS-232 or USB channel. It also shows how the LED
control lamps will switch between various colors to
notify the operator of an error condition. If the printer
is fitted with an LCD display, error messages and
prompts in plain text will also be shown.
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