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Building Technologies Basic Documentation LMV27... CC1P7541en
10 Electronic air-fuel ratio control 17.12.2018
10.3.5 Limitation of modulation range
If the modulation range shall be further restricted from 20 to 100% against the defined
curve, 2 parameters are available to define a new low-fire and high-fire position.
No. Parameter
545
Lower output limit
undefined = 20 %
546
Upper output limit
undefined = 100 %
20 % low-fire
Lower output
limit P545
Upper output
limit P546
100 % high-fire
Air
Fuel
Figure 64: Restriction of modulation range
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