Extraneous Light; No Flame At The End Of Safety Time (Tsa); Flame Intensity; Supervision Of Flame Detector - Siemens LMV27.100x2 Basic Documentation

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Building Technologies

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 LMV27 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 (TSA)

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...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 LMV27 checks the detector for short-
circuits in operation.
Basic Documentation LMV27...
7 Basic unit LMV27
Meaning for the LMV27
Extraneous light during the startup phase
Extraneous light during the shutdown phase
Extraneous light during the startup phase – start prevention
Meaning for the LMV27
No flame at end of the first safety time
No flame at end of the second safety time
Meaning for the LMV27
Short-circuit of flame detector
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CC1P7541en
17.12.2018