HP Color LaserJet 5500 Technical Reference Manual page 276

D-10 PJL Status Codes
Status
Code
27005 Can only use DEFAULT with this variable;
cannot use SET.
27006 Attempted to pass a NULL string to a command
or command option that requires the string to
contain at least one character.
27007 Attempted to DEFAULT a variable which can
only be SET.
Display String or Code Meaning