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Building Technologies Basic documentation LMV37.4... CC1P7546en
HVAC Products 6 Basic unit 01.12.2009
6.5.3.4. Repetition counter
Repetition counters are available for different types of errors. They are used to set the
number of errors that are permitted until lockout occurs. The last error initiates lockout.
When setting the number of errors to 3, for example, a repetition (restart) takes place af-
ter the first 3 errors, and after the third error, the system initiates lockout.
&
Note
Setting 16 means an infinite number of repetitions = no lockout.
Functions with adjustable repetition counter
No. Parameter
215
Repetition limit safety loop
1 = no repetition
2...15 = number of repetitions
16 = constant repetition
223
Repetition limit pressure switch-min gas
1 = no repetition
2...15 = number of repetitions
16 = constant repetition
Recharging time:
After the Operation phase
240
280
Repetition limit loss of flame
1 = no repetition
2 = 1 repetition
Recharging time:
After the Operation phase
Parameter assignment:
240 Gas / fuel 0
280 Oil / fuel 0
Error
code
Diagnostic
code
Meaning for the LMV37.4... system
7 0 Loss of flame
20 0 Pressure switch-min (Pmin)
No min. gas / oil pressure
22
OFF S
0 Safety loop / burner flange open
If the adjustable repetition counter limits are changed, the actual counter is recharged
only when the associated recharging time is reached: After power-on or after a reset.
&
Note
If immediate recharging shall be enforced, the basic unit can be manually locked and
then reset.
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