Teledyne 9110T instruction manual Fault Diagnosis with Warning Messages

Model 9110T NOx Analyzer Troubleshooting & Service

1.Note any WARNING MESSAGES and take corrective action as necessary.

2.Examine the values of all TEST functions and compare them to factory values. Note any major deviations from the factory values and take corrective action.

3.Use the internal electronic status LEDs to determine whether the electronic communication channels are operating properly.

∙Verify that the DC power supplies are operating properly by checking the voltage test points on the relay PCA.

∙Note that the analyzer’s DC power wiring is color-coded and these colors match the color of the corresponding test points on the relay PCA.

4.Suspect a leak first!

∙Customer service data indicate that the majority of all problems are eventually traced to leaks in the internal pneumatics of the analyzer or the diluent gas and source gases delivery systems.

∙Check for gas flow problems such as clogged or blocked internal/external gas lines, damaged seals, punctured gas lines, a damaged / malfunctioning pumps, etc.

5.Follow the procedures defined in Section 3.4.3 to confirm that the analyzer’s vital functions are working (power supplies, CPU, relay PCA, touchscreen, PMT cooler, etc.).

∙See Figure 3-5 or the general layout of components and sub-assemblies in the analyzer.

∙See the wiring interconnect diagram and interconnect list in Appendix D.

12.1.1.FAULT DIAGNOSIS WITH WARNING MESSAGES

The most common and/or serious instrument failures will result in a warning message being displayed on the front panel. Table 12-1 lists warning messages, along with their meaning and recommended corrective action.

It should be noted that if more than two or three warning messages occur at the same time, it is often an indication that some fundamental sub-system (power supply, relay PCA, motherboard) has failed rather than an indication of the specific failures referenced by the warnings.

The analyzer will alert the user that a Warning Message is active by flashing the FAULT LED and displaying the Warning message in the Param field along with the CLR button (press to clear Warning message). The MSG button displays if there is more than one warning in queue or if you are in the TEST menu and have not yet cleared the message.

The following display/touch screen examples provide an illustration of each:

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