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Jun 2001
Error Codes and Internal Diagnostics
Agilent 6890 Gas Chromatograph Service Manual
850 Faults
Fault 200—Pneumatics shutdown: faulty pneumatics board
Status message: Pneu board FPGA
The pneumatics control board is unable to control the instrument’s
pneumatics.
❐ The pneumatics control board is not functioning properly and will need
to be replaced.
Fault 201—Pneumatics shutdown: faulty pneumatics board
Status message: Pneumatics board
The pneumatics control board is not functioning properly for a non-specific
reason.
❐ The pneumatics control board will need to be replaced.
Fault 202—Hydrogen safety shutdown
Status message: Hydrogen shutdown
An inlet configured for hydrogen gas did not reach the pressure setpoint
within 2 minutes. Because hydrogen presents an explosion hazard, the
following occurred:The GC oven fan and heaters are turned off.
❐ The oven flaps are fully opened.
❐ Both pressure and flow controls are turned off and the control
parameters are flashing when viewed.
❐ The small zone heaters for inlets and detectors are turned off and the
control parameters are flashing when viewed.
❐ The warning beep continues until the [Clear] key on the keypad is
depressed.
❐ The oven cannot be turned on unless the instrument is power failed. Turn
the GC power off and on again to restore operation.
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