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11.2.14 Low Carrier Gas Cylinder (DI1) Alarm
This alarm indicates the carrier gas cylinder pressure is below the threshold.
To troubleshoot low carrier gas cylinder (DI1):
1.
Verify that the carrier gas cylinder regulator low pressure switch threshold is set around 90
PSIG. The alarm is switched when pressure drops below the threshold.
2.
If the threshold is above the current cylinder PSIG, replace the carrier gas cylinder.
3.
If the threshold is below the current cylinder PSIG, verify the regulator is functioning properly.
4.
If the procedure fails to locate the problem, contact technical support.
11.2.15 Low Cal Gas Cylinder (DI2) Alarm
This alarm indicates the calibration gas cylinder pressure is below the threshold.
To troubleshoot low cal gas cylinder (DI2):
1.
Verify that the calibration gas cylinder regulator low pressure switch threshold is set around 15
PSIG. The alarm is switched when the pressure drops below the threshold.
2.
If the threshold is above the current cylinder PSIG, replace the calibration gas cylinder.
3.
If the threshold is below the current cylinder PSIG, verify the regulator is functioning properly.
4.
Perform the
Abnormal calibration gas depletion
procedure fails to locate the problem, contact technical support.
11.2.16 GCM Processing Error Alarm
This alarm indicates an error that stops the GCM application from signaling the chromatogram
application to process a chromatogram. The following internal errors could instigate this alarm:
communication response error, polling error, sequence error, and data error.
To troubleshoot GCM processing error:
1.
In the alarm log, check for multiple occurrences.
2.
If the alarms continue to register, place the device in hold and perform a warm start.
3.
When the device completes the startup diagnostics without error, place the device in run.
4.
Following 2-3 cycles, verify that no new alarms are registering.
If alarms continue to register, call technical support.
11.2.17 Bad Bead Alarm
This alarm could indicate a problem with the GC module, the type of carrier gas used or the sample
pressure. Verify that the correct carrier gas is used (see section 4.5). Check the sample pressure (see
section 6.4.2.4.) Otherwise,
11.2.18 No Pilot Valve Change Detected Alarm
This alarm indicates a pressure regulator problem on the manifold. During backflush, a valve is
changed, but no disturbance is registered.
To troubleshoot no pilot valve change detected:
1.
Verify the carrier gas cylinder pressure is above 90 PSIG. If the pressure is below 90 PSIG,
replace the carrier gas cylinder.
2.
Verify the carrier gas cylinder pressure regulator set point is 90 PSIG. If not, correct the set
point to 90 PSIG.
3.
Following the Manifold Replacement instructions in section 10.23, replace the manifold.
the feed-through manifold gasket.
IMPORTANT NOTE: If both the Bad Bead Alarm and the No Pilot Valve Change Detected Alarm
trigger, verify that the sample pressure is within correct operational range. See section
sample pressure limits.
11.2.19 Sample Flow Detection Alarm
This alarm indicates a pressure issue such as a blocked vent tube, too short bleed cycle, stream test is
in auto, etc.
To troubleshoot sample flow detection:
1.
Inspect the vent tubes for blockage, including crimps in tubing, dirt or debris.
2.
Perform the
Sample pressure test
3.
Verify the sample bleed time is set greater than one second.
1 3 0 | N G C8 20 0 A N D PG C 1 00 0 US ER MA N UA L | 21 0 15 10 MNA H
Replace the GC Module
(see section 11.3.2).
procedure, (see section 11.3.5). If the
(see section 10.17).
Replace
6.4.2.4
for
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Table of Contents
Troubleshooting
