HP Color LaserJet 5500 Technical Reference Manual page 143

Note
Status Category
10 Informational messages which do not indicate errors, such as
(10-000 to 10-999) "Device was put online and is ready" or "device was put offline."
11 These messages indicate background paper mount messages, which
(11-000 to 11-999) means one of the available paper input sources is empty, but
another paper source is available and loaded with the correct paper
size. The printer remains online during background paper mount
conditions.
12 Messages indicating background paper tray status, such as "tray
(12-000 to 12-999) open" or "tray lifting". The printer remains online during
background paper tray status conditions.
15 These messages indicate output bin status, such as "output bin full."
(15-000 to 15-999) The printer goes offline when the output bin is full.
20 This type of message denotes a PJL parser error. When this type of
(20-000 to 20-999) error occurs, the entire command line is ignored.
25 These messages are PJL parser errors. When this type of message
(25-000 to 25-999) occurs, only part of the PJL command is ignored, instead of the
whole command as happens with 20-xxx errors.
27 These messages are PJL semantic errors, indicating the command
(27-000 to 27-999) syntax is acceptable, but command execution is not possible for
some reason. A situation that produces a semantic error is trying to
lock a paper tray when all other paper trays are already locked.
30 Most conditions in this category are auto-continuable, indicating
(30-000 to 30-999) that if no operator action is taken, the printer automatically
continues if the auto-continue feature is set to true; if auto-continue
is set to false, the printer waits until an operator presses either the
Continue or On Line key. Examples of these errors include non-fatal
I/O errors or when a page is ejected because it is too complex to
format without the page protection feature enabled.
For those printers supporting Japanese printing, when the
language is set to Japanese, strings which correspond to a
control panel message are displayed on the control panel
using the JIS X0201-76 character set.
Description
Status Readback Commands 7-35