Agilent Technologies 6890 Series Service Manual page 554

Shutdown 22—Front inlet heating too slowly; temperature shut off
Shutdown 23—Back inlet heating too slowly; temperature shut off
The inlet has been heating longer than the allowable time without reaching
the setpoint. The zone is shut down and the actual temperature display flashes
OFF. To rest, cycle the zone power or change the setpoint.
This could be a bad thermal sensor, where the reading is incorrect but
the value is within the valid temperature range.
A failed or defective heater can cause this condition.
Jun 2001
Shutdown 22—Front inlet heating too slowly; temperature shut off
Error Codes and Internal Diagnostics
Agilent 6890 Gas Chromatograph Service Manual
Shutdowns 840
9 of 10