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Building Technologies Division Basic documentation LMV36... CC1P7544en
Infrastructure & Citiies Sector 11 Electronic fuel-air ratio control 25.09.2013
VSD
Between the ignition time (P0) and the low-fire point (P1), a speed differential of up to
40% can be set for the VSD, independent of the selected ramp. This means that the
period of time from ignition to low-fire can vary between 4…32 seconds (5...40 seconds
ramp).
Error
code
Diagnostic
code
Meaning for the LMV36... system
84 Bit 0
Valency 1
VSD: Curve too steep in terms of ramp rate
Bit 1
Valency 2…3
Fuel actuator: Curve too steep in terms of ramp rate
Bit 2
Valency 4…7
Air actuator: Curve too steep in terms of ramp rate
The parameterized curve is steeper than permitted with the selected actuator speed.
11.3.3 Entering the running position
The burner is ignited when ignition position P0 is reached. When entering operating
phase 60, the actuators follow the defined curves until the low-fire position is reached
(20% or parameter 545 / 565 – lower output limit).
11.3.4 Operating position
As demanded by the load controller, the actuators are driven along the defined 20% and
100% curves. Point of ignition P0 can only be reached via the curve settings.
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