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GC ignition fault during sample analysis.

Question asked by matt99 on Dec 18, 2018
Latest reply on Dec 20, 2018 by matt99



Have this issue with an Agilent 6850 GC:


The system performs normally during the pre-run: the oven temperature, front inlet total flow/inlet pressure and signal 1 valve values are all normal/stable.  When we switch to the test method and start sample analysis, we have the following errors:


Detector H2 Flow

Detector Air Flow


It tries to ignite several times, dropping in and out of ready status before failing with fault 214.  When we switch back to the pre-run, it ignites and behaves normally.  We've checked for leaks although these seem unlikely given that it performs normally on the pre-run.


Does anyone have any ideas what might be causing this problem?