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Installation and Electrical Connection
5.3 Diagnostics
Causes for Triggering the Contamination Warning (blinking LED):
Display LED
Diagnosis/Cause
Elimination
Continuous blinking
at approx. 2.5 Hz
Contamination
Carefully clean the optic cover with a cloth.
Aged emitter diode
Replace the sensor.
Unreliable working range
• Increase the sensor’s switching distance.
• Reduce distance between sensor and object.
Continuous blinking
at approx. 5 Hz
Short-circuit
Check electrical wiring and eliminate the short-circuit.
Over-temperature
Disconnect the sensor from supply power
and allow it to cool down.
Hardware error
Replace the sensor.
Contamination Warning Flowcharts
not detected
not detected
detected
beginning contamination
Object
Object
Object
not detected
not detected
detected
Reflex Mode
no contamination
Object
Object
Object
Object
Switching Status
Indicator
Object
Switching Status
Indicator
Object
Switching Status
Indicator
not detected
not detected
not detected
advanced contamination
Object
Object
Object
off
off
on
off
off
off
off
blinking
off
