SICK GTB20, Operating Instructions Manual

Page: 34 / 164

Table 10: Troubleshooting
LED/fault pattern Cause Measures
Yellow LED does not light up
even though the light beam is
aligned to the object and the
object is within the set sensing
range No voltage or voltage below
the limit values Check the power supply,
check all electrical connec‐
tions (cables and plug connec‐
tions)
Voltage interruptions Ensure there is a stable power
supply without interruptions
Sensor is faulty If the power supply is OK,
replace the sensor
Yellow LED flashes Sensor is still ready for oper‐
ation, but the operating condi‐
tions are not ideal Check the operating condi‐
tions: Fully align the beam
of light (light spot) with the
object. / Clean the optical sur‐
faces . / Check sensing range
and adjust if necessary.
Yellow LED lights up, no object
in the path of the beam The sensing range distance is
too large Reduce the sensing range
Object is in the path of the
beam, yellow LED does not
light up Distance between the sensor
and the object is too long or
sensing range is set too short Increase the sensing range
8 Disassembly and disposal
The sensor must be disposed of in line with applicable country-specific regulations.
When disposing of them, you should try to recycle them (especially the precious met‐
als).
NOTE
Disposal of batteries, electric and electronic devices
• According to international directives, batteries, accumulators and electrical or
electronic devices must not be disposed of in general waste.
• The owner is obliged by law to return this devices at the end of their life to the
respective public collection points.
•
WEEE: This symbol on the product, its package or in this document,
indicates that a product is subject to these regulations.
9 Maintenance
This SICK sensor is maintenance-free.
We do, however, recommend that the following activities are undertaken regularly:
•
Clean the optical interfaces using a plastic cleaner, do not use acetone or methy‐
lated spirits.
•
Check the fittings and plug connectors
No modifications may be made to devices.
Subject to change without notice. Specified product properties and technical data are
not written guarantees.
OPERATING INSTRUCTIONS
34 O P E R A T I N G I N S T R U C T I O N S | GTB20 8026846/2022-06-09 | SICK
Subject to change without notice
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