8 FAULT DIAGNOSIS
8023994-17I6/2020-03-19|SICK
ORIGINAL OPERATING INSTRUCTIONS| VMS4100/5100
Subject to change without notice
8.1.3 Fault indication on the photoelectric retro-reflective sensor trigger
Fault indication
LED receive indicator is permanently off.
Fault cause Possible solution to the problem
Reflector is not positioned in the
beam path of the photoelectric
sensor.
Readjust the photoelectric sensor, clean it,
or check the application conditions.
Fault indication
LED receive indicator is flashing.
Fault cause Possible solution to the problem
Reflector is being detected in
the fringe range.
Readjust the photoelectric sensor, clean it,
or check the application conditions.
Fault indication
LED receive indicator lights up or flashes even when an object is present in the path
of the beam.
Fault cause Possible solution to the problem
Reflector is being detected in
the fringe range.
Readjust the photoelectric sensor, clean it,
or check the application conditions.
Tab. 22: Fault indication on the photoelectric retro-reflective sensor trigger
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