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Building Technologies Basic Documentation LMV37.4... CC1P7546en
30 Revision history of LMV37.4 17.12.2018
Software version V01.90
Scaling of analog input changed (no burner OFF function)
Optimization: Variable step width between ignition and low-fire (40% difference in
speed, independent of ramp time; traveling time varies between 4 and 16 seconds
with a 5-second to 20-second ramp)
Optimization: Checking the standardized speed between microcomputer 1 and
microcomputer 2 (wrong standardized speeds after restore)
Objective: Avoiding wrong standardized speeds after restore to new hardware
resulting from resonator tolerances of the 2 microcomputers
Revision of standardization of VSD signal in terms of control and evaluation of
errors
Optimization: Curve adjustment with pneumatic fuel-air ratio control. Here, the curve
can be adjusted with no need for making the standardization beforehand of VSD
Optimization: Parameter access when firing on oil
Optimization: Assessment of Pressure switch-min in phase 62
Software version V2.00
Correction to fuel train Gp1: First safety time was up to 0.4 seconds too long
Correction to fuel train Gp1: Evaluation of pressure switches in phases 40 to 50
(Pressure switch-min / Pressure switch-max were not valued in phase 44, Pressure
switch-min / Pressure switch-max were evaluated in phase 50 although the main
valve was switched on)
First error reception for gas shortage with first setting (gas shortage error was
exceeded with first setting of OFF UPr – both errors occur in the same cycle)
Timeout (parameter 127) or communication breakdown with the AZL2 leads to
lockout during the time the curves are set (error code: 167, diagnostics: 8)
with cold setting, no startup on completion of the password time
Communication breakdown with the ACS410 (30 seconds) leads to lockout during
the time the curves are set (error code: 167, diagnostics 9)
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