Vigilantplant TDLS8000, User Manual

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<10. Troubleshooting>
10-1
IM 11Y01D01-01EN
10. Troubleshooting
This chapter explains the faults and warnings that the TDLS8000 may detect. It also explains
how to inspect and restore the TDLS8000 when other problems occurs.
TDLS8000 is composed Laser Unit and Sensor control Unit. And these units are adjusted and
checked in combined. Off-site repair is necessary as a result of troubleshooting, the both units
are sent to factory.
10.1 Fault Display and Handling
A fault occurs when the various types of diagnostic information being monitored by the self-
diagnostics function are clearly abnormal and correct concentration calculation is not possible. It
may signify a malfunction. If a fault occurs, the TDLS8000 output and display will respond in the
following manner.
• The analog output is set to the specified state.
• The fault contact is opened.
• The fault LED (red) lights.
• The alarm indicator blinks on the YH8000 display.
• Alarm information is indicated over HART communication (see section 7.4).
• Alarm information is shown on the SCU display.
The following table shows the fault types and their corrective actions. Alarm numbers are defined
for fault type identification. These numbers are shared among the YH8000, HART, and SCU
displays, even though the abbreviations of the displayed fault names may differ. Depending
on the alarm, a sub number may also be displayed. This number is used by Yokogawa service
representatives for troubleshooting purposes.
NOTE
A fault that occurs is not cleared automatically even when the cause of the fault is eliminated.
Except for a portion of the faults, executing Clear Latched Alarms clears them, but if the cause
of the fault is still present, the fault will occur again. If this happens, the device may have
malfunctioned, so contact your Yokogawa service representative.
Execution menu path:
[HART] “Diagnosis/Service>>>System>>Clear latched alarms”
[YH8000] “ >>Execution>>System>>Clear Latched Alarms”
No. Displayed name
(HART)
Description Corrective action
45 Laser Md Temp Low The laser module temperature is too
low.
Check the laser unit’s ambient temperature.
Contact your Yokogawa service
representative.
46 Laser Md Temp High The laser module temperature is too
high.
Check the laser unit’s ambient temperature.
Contact your Yokogawa service
representative.
47 Laser Temp Low The laser temperature is too low. Contact your Yokogawa service
representative.
48 Laser Temp High The laser temperature is too high. Contact your Yokogawa service
representative.
50 Peak Center OOR The absorption peak position is
outside the range.
Contact your Yokogawa service
representative.
51 Ref Peak Height Low The reference peak height is too low. Contact your Yokogawa service
representative.
3rd Edition: Jun. 10, 2016-00