Fault Diagnosis - SICK WL4S-3 Manual De Instrucciones

4

FAULT DIAGNOSIS

4 Fault diagnosis
5 Table Fault diagnosis
4
Image: G
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
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
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 re‐
flector. / Clean the optical sur‐
faces (sensor and reflector). /
Readjust the sensitivity
(teach-in) / Reflector is not
suitable for the application in
question (we recommend only
using SICK reflectors) / Check
sensing range and adjust if
necessary; see graphic H. /
Distance between the sensor
and the reflector 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). /
8012137.YCB8 | SICK
Subject to change without notice