Keypad Operation 4
Operating Guide 47
A continuous tone sounds if a hydrogen flow is shut down
or a thermal shutdown occurs.
One beep sounds when a problem exists, but the problem
will not prevent the GC from executing the run. The GC will
emit one beep and display a message. The GC can start the
run and the warning will disappear when a run starts.
Fault messages indicate hardware problems that require user
intervention. Depending on the type of error, the GC emits
no beep or a single beep.
Error conditions
If a problem occurs, a status message appears. If the
message indicates broken hardware, more information may
be available. Press the applicable component key (for
example, Front Det, Oven, or Front Inlet).
Blinking setpoint
If the system shuts down a gas flow, multiposition valve, or
the oven, Off will blink on the appropriate line of the
component’s parameter listing.
If there is a detector pneumatics shutdown or failure in
another part of the detector, the detector On/Off line of the
detector’s parameter list blinks.
Before resuming GC operations, investigate and resolve the cause
of the hydrogen shutdown. See Hydrogen Shutdown in the
Troubleshooting manual for details.
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