UC***-18GS series
Troubleshooting
2020-11
65
11 Troubleshooting
11.1 What to Do in Case of an Error
In case of an error, check whether a fault with the sensor can be remedied according to the fol-
lowing checklist.
If none of the information specified in the checklist solves the problem, in the event of queries
contact Pepperl+Fuchs via your sales office. Have details of the model number and firmware
version of the sensor ready if possible.
Checklist
Error Cause Remedy
Green LED not lit up The power supply is switched
off.
Check whether there is a reason
why the power supply is switched
off (installation or maintenance
work, etc.). Switch on the power
supply if appropriate.
Green LED not lit up The plug is not connected to
the connector on the sensor.
Connect the plug to the sensor and
tighten the cap nut by hand.
Green LED not lit up Wiring error in the splitter or
switch cabinet.
Check the wiring carefully and
repair any faults with the wiring.
Green LED not lit up Supply cable to the sensor is
damaged.
Replace the damaged cable.
No IO-Link connection to
the device
The communication port on
the sensor is not connected to
the IO-Link master.
Make sure that the communication
port on the sensor is connected to
the IO-Link master.
No IO-Link connection to
the device
No power supply Check whether there is a reason
for the absence of the power sup-
ply (installation or maintenance
work, etc.). Switch on the power
supply.
The target object is not
detected, even though
the sensor is OK
Perhaps there is an obstruc-
tion in the vicinity of the sen-
sor
Check that the sensor is correctly
aligned. Check sensor configura-
tion and if necessary, change the
sound beam width.
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