Extraneous Light; No Flame At The End Of Safety Time 1 (Tsa1); Flame Intensity; Supervision Of Flame Detector - Siemens LMV37.4 Series Basic Documentation

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Building Technologies Division
Industry Sector

7.2.2 Extraneous light

Extraneous light in standby mode (phase 12) leads to start prevention, followed by a
restart. Extraneous light during the prepurge phase results in immediate lockout. If
extraneous light occurs during the shutdown phase, the system switches to the safety
phase.
One repetition is permitted. This means that if the error occurs again the next time the
system is shut down, the unit will initiate lockout.
Error Diagnostic
code code
4 0
1
2

7.2.3 No flame at the end of safety time 1 (TSA1)

If no flame is established by the end of the first safety time, the unit initiates lockout.
Error Diagnostic
code code
2 1
2

7.2.4 Flame intensity

The flame's intensity can be displayed.
It is standardized from 0 to 100%.
No. Parameter
954 Intensity of flame
Note
Also refer to chapter Intensity of flame during curve settings.

7.2.5 Supervision of flame detector

Error Diagnostic
code code
93 3
At the QRB... / QRC... flame detector's input, the LMV37.4... checks the detector for
short-circuits in operation.
Basic documentation LMV37.4...
7 Basic unit
Meaning for the LMV37.4... system
Extraneous light during startup
Extraneous light during shutdown
Extraneous light during startup – start prevention
Meaning for the LMV37.4... system
No flame at the end of safety time 1 (TSA1)
No flame at the end of safety time 2 (TSA2)
Meaning for the LMV37.4... system
Short-circuit of flame detector
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CC1P7546en
20.09.2013