Messages Part 4. Fault messages
264
Fault 218—F TCD filament shorted
Fault 219—B TCD filament shorted
The TCD filament bridge voltage indicates that the resistance of the filament is
too low, indicating a shorted filament. This could be caused by a worn or sagging
filament or if the wires from the TCD (including the cell temperature sensor
wires) are not connected properly to the detector board or are touching each
other.
The detector will not be ready until the condition is corrected.
• Check that the wires from the cell are connected on the detector board
properly.
• The TCD cell must be replaced. Contact your Agilent service representative.
Faults 221 to 236—Thermal shutdown
These faults cause the GC to shut down entirely. A thermal fault is detected if
the oven or another heated zone is not within its allowable temperature range
(lower than minimum temperature or greater than maximum temperature by
25°C). Several things could cause this error:
• A problem with the electrical supply to the instrument.
• A malfunction of the zone control electronics.
• A shorted temperature sensor.
• A shorted heater.
No power reaches the oven and other heated zones. The GC is not ready.
Any of the following components can experience a thermal shutdown: the oven,
the inlets, the detectors, and the aux zones. In addition, problems with
electronics on the main PC board can cause a thermal shutdown.
• If you see any thermal shutdown message, turn the GC off and on. If the
error was caused by a power supply problem, the error will disappear and
the instrument will become ready. If the error reappears, the main board or
one or more of the heater/sensor assemblies must be replaced. Contact your
Agilent service representative.
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