SICK WL23-2 Manual De Operación página 6

7 Fault diagnosis table
8015975.YHN1 | SICK
Subject to change without notice
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
WT(B)23-2: Yellow LED fla‐
shes /
WT(B)23-2: Yellow LED flashes
WTE23-2: Yellow LED flashes
(only briefly) /
WTE23-2: Yellow LED flashes
(only briefly)
Signal interruptions when ob‐
ject is detected /
Signal interruptions when ob‐
ject is detected
FAULT DIAGNOSIS TABLE
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
Depolarizing property of the
object surface (e.g., tape), re‐
flection /
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 /
H. /
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 /
H.
Check the teach-in mode /
Check the teach-in mode
Reduce sensitivity or change
the position of the sensor /
Reduce sensitivity or change
the position of the sensor
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