IFM Electronic Efector 150 KNM Bedienungsanleitung Seite 15

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• Warning of possible malfunction
If the red LED is lit continuously, the operating conditions are no
longer optimum.
For example a change of the sensing range caused by deposits of
dirt can be detected.
You can take preventive measures to avoid a malfunction. For exam-
ple readjust or clean the unit.
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