General Troubleshooting; Fault Diagnosis With Warning Messages - Teledyne T200 Operation Manual

Troubleshooting & Service

12.1. GENERAL TROUBLESHOOTING

12.1.1. FAULT DIAGNOSIS WITH WARNING MESSAGES

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Teledyne API – T200 NO/NO2/NOx Analyzer Operation Manual
The T200 has been designed so that problems can be rapidly detected, evaluated and
repaired. During operation, it continuously performs diagnostic tests and provides the
ability to evaluate its key operating parameters without disturbing monitoring
operations.
A systematic approach to troubleshooting will generally consist of the following five
steps:
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.
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.
06858E DCN7057