Fault Diagnosis - SICK WTB4S-3 Instrucciones De Operación

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Fault diagnosis

6 Table Fault diagnosis
8012136.YM43 | SICK
Subject to change without notice
Table Fault diagnosis indicates which measures are to be taken if the sensor stops working.
LED indicator/fault pattern /
LED indicator/fault pattern
Green LED does not light up /
Green LED does not light up
Green LED does not light up /
Green LED does not light up
Green LED does not light up /
Green LED does not light up
Yellow LED flashes /
Yellow LED flashes
Yellow LED lights up, no object
in the path of the beam /
Yellow LED lights up, no object
in the path of the beam
Object is in the path of the
beam, yellow LED does not
light up /
Object is in the path of the
beam, yellow LED does not
light up
Cause /
Cause
No voltage or voltage below
the limit values /
No voltage or voltage below
the limit values
Voltage interruptions /
Voltage interruptions
Sensor is faulty /
Sensor is faulty
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
/ Distance between the sen‐
sor and the background is too
short /
/ Distance between the sen‐
sor and the background is too
short
Distance between the sensor
and the object is too long or
sensing range is set too
short /
Distance between the sensor
and the object is too long or
sensing range is set too short
FAULT DIAGNOSIS
Measures /
Measures
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)
Ensure there is a stable power
supply without interruptions /
Ensure there is a stable power
supply without interruptions
If the power supply is OK,
replace the sensor /
If the power supply is OK,
replace the sensor
Check the operating conditi‐
ons: Fully align the beam of
light (light spot) with the
object. / Clean the optical sur‐
faces . / Readjust the sensiti‐
vity / Check sensing range
and adjust if necessary; see
graphic F. /
Check the operating conditi‐
ons: Fully align the beam of
light (light spot) with the
object. / Clean the optical sur‐
faces . / Readjust the sensiti‐
vity / Check sensing range
and adjust if necessary; see
graphic F.
Reduce the sensing range,
see graphic F /
Reduce the sensing range,
see graphic F
Increase the sensing range,
see graphic F /
Increase the sensing range,
see graphic F
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