12
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
not detected
not detected
detected
Fork Sensor
no contamination
Object
Switching Status Indicator
Object
Switching Status Indicator
Object
Switching Status Indicator
not detected
not detected
not detected
advanced contamination
off
off
on
on
on
on
on
blinking
blinking
Object
Emitter
Receiver
Object
Emitter
Receiver
Object
Emitter
Receiver
Object
Emitter
Receiver
Object
Emitter
Receiver
Object
Emitter
Receiver
Object
Emitter
Receiver
Object
Emitter
Receiver
Object
Emitter
Receiver
