PROCEDIMENTO ATTO A GENERARE UN SEGNALE INDICANTE LA SOSTITUZIONE DEL FILTRO

摘要

The method involves changing the speed of an electric motor (4), which is applied as an indicator. The exceeding of a preset threshold value of the motor speed change is detected and is considered, whether a preset time since the last filter change has expired or whether the difference of the measured values of two successive measurements lies within a threshold.