SICK WTB4-3 - Page 5

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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/f
ault pattern
Cause /
Cause
Measures /
Measures
Green LED does not light up /
Green LED does no
t 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 connec‐
tions (cables and plug connec‐
tions) /
Check the power supply,
check all electrical connec‐
tions (cables and plug connec‐
tions)
Green LED does not light up /
Green LED does no
t light up
Voltage interruptions /
Voltage interruptions
Ensure there is a stable power
supply without interruptions /
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8011449.126R | SICK
Subject to change without notice