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11 Troubleshooting
DANGER – Serious damage to health / risk to life
. Do not open or remove covers,
including the PCCU local communications cover, unless the area is known to be non-
hazardous.
If these troubleshooting instructions do not lead to a resolution, and assistance is required, contact
customer service. Contact information is on the last page of this manual.
11.1 Startup diagnostics troubleshooting
This section determines what has caused an alarm during startup diagnostics. The analyzer has
extensive built-in tests which are performed each time the device is started. This startup testing may
be disabled, but we recommend that it be left enabled.
The diagnostics consist of 4 areas of testing:
Carrier Pressure Regulator Test
Oven Temperature Test
Processor Control Test
Stream Test
The startup tests may also be performed on a regular schedule. See the PCCU help files for more
information on scheduling diagnostics.
IMPORTANT NOTE:
ABB performs extensive testing on each analyzer prior to shipment, and each
device is factory-calibrated using our standard calibration blend.
During the stream test, streams with no gas pressure will fail and they will be disabled in the
stream sequence. To enable these streams, click
Stream Setup
on the Analyzer Operation screen.
The following table applies to all startup diagnostics. Each test group will have status results to
narrow-down the possibilities for troubleshooting.
Table 11-1: Startup diagnostics
Status
Description
Idle
No tests are running
In Progress
Test(s) are in progress
Passed
Basic and/or additional tests, if required, passed
Failed
The basic test failed, and additional more in-depth tests ran and also failed
Aborted
Tests were aborted by the user using the Abort command
11.1.1
Carrier Pressure Regulator Test
These alarms are indicative of low carrier pressure. The causes range from a closed carrier cylinder
regulator to a blockage inside the GC module.
In the following table, the descriptive status and definitions are applicable for only the carrier pressure
regulator test and are in addition to those defined for all startup diagnostics.
Table 11-2: Carrier pressure regulator diagnostics
Status
Description
Low Reg
Pressure
Pressure is too low to continue the test. Possible causes are the carrier cylinder is
low, the regulator on the carrier cylinder needs to be turned up to 90 PSIG, the
carrier line from the cylinder to the analyzer is plugged, etc.
Flow Blocked
A blockage was sensed during one of the tests. The flow test was run in an attempt
to dislodge the blockage but was not successful. See flow test below.
Pressure Reg
Test
This is an additional test that is in progress because the basic test failed. A different
status will be displayed after the test has finished.
Flow Test
The flow test is in progress. The flow test is initiated when a blockage is sensed. The
flow test will raise the pressure in an attempt to blow the plug out through the vent.
If unsuccessful, the flow blocked status will display.
Failed
The additional tests cannot prove with certainty, but either the GC module or the
manifold assembly are bad.