Fault Diagnosis With Warning Messages - Teledyne T101 Operation Manual

Troubleshooting & Service

9.1.1. FAULT DIAGNOSIS WITH WARNING MESSAGES

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Examine the values of all TEST functions and compare them to factory
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values. Note any major deviations from the factory values and take
corrective action.
Use the internal electronic status LED's to determine whether the
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electronic communication channels are operating properly. Verify that the
DC power supplies are operating properly by checking the voltage test
points on the relay board. 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 board.
Suspect a leak first! Technical Support data indicate that half of all
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problems are eventually traced to leaks in the pneumatic system of the
analyzer, the source of zero air or span gases or the sample gas delivery
system. Check for gas flow problems such as clogged or blocked
internal/external gas lines, damaged seals, punctured gas lines, a
damaged pump diaphragm, etc.
Follow the procedures defined in Section 9.5 for confirming that the
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analyzer's basic components are working (power supplies, CPU, relay
board, keyboard, PMT cooler, etc.). See Figure 3-8 for general layout of
components and sub-assemblies in the analyzer. See the wiring
interconnect drawing and interconnect list, see Appendix D.
The most common and/or serious instrument failures will result in a warning message
displayed on the front panel. Table 11-1 contains a list of warning messages, along with
a list of possible faults that might be responsible for the warning condition.
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 analyzer sub-system (power supply,
relay board, motherboard) has failed rather than an indication of the specific failures
referenced by the warnings. In this case, a combined-error analysis needs to be
performed.
The analyzer will alert the user that a warning 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 will be displayed if there is more than one
warning in the queue or if you are in the TEST menu and have not yet cleared the
message. The following display/touchscreen examples provide an illustration of each:
Teledyne ML - T101 Operation Manual