Loss Of Flame - Siemens LMV37.4 Series Basic Documentation

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7.2.1 Loss of flame

In the event of loss of flame, the unit initiates safety shutdown, followed by a restart, if
required. A repetition counter can be used to select the number of flame losses after
which the unit shall initiate lockout (refer to chapter Repetition counter).
Error Diagnostic
code code
7 0
No. Parameter
Software drop out delay time of flame signal (100 ms)
186 Index 0 = QRB... / QRC... (0 = inactive, >1)
Index 1 = ION / QRA... (0 = inactive, >3 - only 200 ms-steps)
194 Repetition limit no flame at the end of safety time (TSA)
1 = no repetition
2...4 = 1...3 repetitions
Recharging time:
Entering into operation
Repetition limit loss of flame
240 1 = no repetition
2 = 1 repetition
Repetition limit loss of flame
280 1 = no repetition
2 = 1 repetition
Caution!
The response time of the flame detector leads to an extension of the second
safety time 2 (TSA2)! This must be taken into consideration when designing the
burner!
Basic documentation LMV37.4...
7 Basic unit
Meaning for the LMV37.4... system
Loss of flame
CC1P7546en
20.09.2013