850 Faults
Fault 257—Front inlet: invalid inlet module
18 of 22
Jun 2001
Error Codes and Internal Diagnostics
Agilent 6890 Gas Chromatograph Service Manual
Fault 257—Front inlet: invalid inlet module
Fault 258—Back inlet: invalid inlet module
Status message: F inlet invalid type or B inlet invalid type
The front or back inlet module is not supported by the firmware installed in
the 6890 GC.
Fault 259—Front detector: det board not the same as module
Fault 260—Back detector: det board not the same as module
Status message: F det type mismatch or B det type mismatch
The detector module does not match the installed detector electronics board.
❐ The position of the detector pneumatics module and detectors were
changed, but the detector board was not. Change the detector boards.
Fault 261—Host communications: MIO board defective
Status message: MIO board defective
The connection between the MIO PC board and the mainboard could be faulty
or the MIO board is defective. Communication between the 6890 GC and the
host will halt.
❐ Reseat the MIO card.
❐ If reseating did not correct the problem, the MIO PC board is defective.
Fault 262—Host communications: RS232 defective
Status message: RS232 defective
The communications between the RS232 chip and the mainboard are faulty.
Most likely, the mainboard is faulty. Communication between the GC and the
other device will halt.
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