5 Fault diagnosis
Table indicates which measures are to be taken if the sensor stops working.
6 Table Fault diagnosis
LED indicator/fault pattern /
LED indicator/fault pattern
Cause /
Cause
Measures /
Measures
Green LED does not light up /
Green LED does not light up
No voltage or voltage below
the limit values /
No voltage or voltage below
the limit values
Check the power supply,
check all electrical connecti‐
ons (cables and plug connecti‐
ons) /
Check the power supply,
check all electrical connecti‐
ons (cables and plug connecti‐
ons)
Green LED does not light up /
Green LED does not light up
Voltage interruptions /
Voltage interruptions
Ensure there is a stable power
supply without interruptions /
Ensure there is a stable power
supply without interruptions
Green LED does not light up /
Green LED does not light up
Sensor is faulty /
Sensor is faulty
If the power supply is OK, re‐
place the sensor /
If the power supply is OK, re‐
place the sensor
Yellow LED flashes /
Yellow LED flashes
Sensor is still ready for opera‐
tion, but the operating conditi‐
ons are not ideal /
Sensor is still ready for opera‐
tion, but the operating conditi‐
ons are not ideal
Check the operating conditi‐
ons:
Fully align the beam of
light (light spot) with the re‐
flector. / Clean the optical sur‐
faces (sensor and reflector). /
Readjust the sensitivity / Re‐
flector is not suitable for the
application in question (we re‐
commend only using SICK re‐
flectors) / Check sensing ran‐
ge and adjust if necessary;
see graphic H. / Distance bet‐
ween the sensor and the re‐
flector is too long /
Check the operating conditi‐
ons: Fully align the beam of
light (light spot) with the re‐
flector. / Clean the optical sur‐
faces (sensor and reflector). /
Readjust the sensitivity / Re‐
flector is not suitable for the
application in question (we re‐
commend only using SICK re‐
flectors) / Check sensing ran‐
ge and adjust if necessary;
see graphic H. / Distance bet‐
ween the sensor and the re‐
flector is too long
5 FAULT DIAGNOSIS
4
8016719.10DB| SICK
Subject to change without notice
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