Fault Diagnosis - SICK WTB4-3Teach-in Instrucciones De Operación

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Fault diagnosis

6 Table Fault diagnosis
8011166.126R | SICK
Subject to change without notice
Table 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 flashes (only brie‐
fly) /
Yellow LED flashes (only briefly)
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 be‐
am, yellow LED does not light
up /
Object is in the path of the be‐
am, 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
Teach-in mode /
Teach-in mode
/ 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, re‐
place the sensor /
If the power supply is OK, re‐
place the sensor
Check the operating conditi‐
ons: Fully align the beam of
light (light spot) with the ob‐
ject. / Clean the optical surfa‐
ces . / Readjust the sensitivity
(teach-in) / 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 ob‐
ject. / Clean the optical surfa‐
ces . / Readjust the sensitivity
(teach-in) / Check sensing
range and adjust if necessary;
see graphic F.
Check the teach-in mode /
Check the teach-in mode
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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