Operating Instructions Chapter 8
WSU/WEU263
8013338/YTA4/2016-03-24 © SICK AG • Industrial Safety Systems • Germany • All rights reserved 31
Subject to change without notice
Fault diagnosis
8 Fault diagnosis
T
his chapter describes how to identify and rectify errors and malfunctions during the
operation of the WSU/WEU26@3 devices.
8.1 In the event of faults or errors
Cease operation if the cause of the malfunction has not been clearly identified!
Stop the machine if you cannot clearly identify or allocate the error or if you cannot safely
rectify the malfunction.
Complete function test after rectification of fault!
After rectifying a fault, perform a complete function test as per chapter 6.2 “Test notes”.
8.2 SICK support
If you cannot remedy an error with the help of the information provided in this chapter,
please contact your local SICK representative.
8.3 Status displays of the diagnostics LEDs
This section describes the meaning of the diagnostics LED and how to respond.
Diagnostics LEDs of the sender
Display
Yellow Red
Possible cause Rectification of the error
No operating voltage,
or voltage too low
Check the supply voltage and
activate, if necessary.
(1 Hz,
power up
delay 10 %)
System error Switch the device off for at least
3 seconds and then back on again.
If the error continues to occur:
Replace the device.
WARNING
WARNING
WSU26-3
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