Messages
Shutdown messages
Released: March 2004 6850 Series II GC User Information page 91 of 256
Shutdown 9. The detector’s makeup gas is unable to reach or maintain the
pressure setpoint.
Shutdown 13–15. The auxiliary EPC gas is unable to reach or maintain the
pressure setpoint.
The detector gases are shut off and the instrument will be not ready until the
problem is corrected and the detector reaches the pressure setpoint.
SHUTDOWN 16 Valve 2 not switching
To clear the shutdown, enter a new setpoint.
Possible causes: Valve not connected
Valve is stuck
Switching time is too short for the valve’s speed
Valve sticking slightly or sample too viscous
The multiposition valve has tried to switch twice without success. The valve
shuts down and becomes not ready (not at setpoint).
SHUTDOWN 17 Valve 2 setpt error
To clear the shutdown, enter a new setpoint.
Possible causes: Entered valve position is larger than valve supports.
Invert BCD setpoint is incorrect. With most valves, the invert should be On. If the BCD
setpoint is already On, set it to Off.
The multiposition valve is switching to the wrong position or is unable to
switch to the setpoint position. The valve shuts down and becomes not ready
(not at setpoint).
SHUTDOWN 18 Inlet cryo shut off
To clear the shutdown, turn the zone off, then on, or change the temperature
setpoint.
Possible causes: Cryo timeout: Check timeout setpoint.
Cryo fault: Check coolant supply. Defective cryo valve.
Cryo shutdowns conserve coolant when the GC is unable to start a run. The
cryogenic cooling system may still be working properly. A cryo timeout occurs
if your specified cryo timeout period expires before the oven reaches its
temperature setpoint. A cryo fault occurs if cryo cooling has been on for over
16 minutes but the oven has not reached its temperature setpoint.
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