Chapter 8 Operating Instructions
UE402
32 © SICK AG • Industrial Safety Systems • Germany • All rights reserved 8009874/YT67/2016-02-22
Subject to change without notice
Fault diagnosis
Display Possible cause Remedying the error
Key-operated push-
button for bypass is
malfunctioning or
invalid configuration
Check whether the configuration of the key-
operated pushbutton for bypass in the CDS
matches the electrical connection.
Check the function of the key-operated push-
button for bypass and replace it if necessary.
Ensure that both contacts on the key-operated
pushbutton for bypass are pressed within 2
seconds.
Short-circuit at the
operating mode
selector switch
Check the operating mode inputs on the UE402
for short-circuit to 24 V.
UE402 is defective Interrupt the supply of power to the C4000 and
to the UE402 for at least 3 seconds.
If the problem is still present, then replace the
UE402.
8.5 Extended diagnosis
The CDS software (Configuration & Diagnostic Software) supplied with the safety light
curtain C4000 contains extensive diagnostic facilities. It allows you to narrow down the
problem if the error is non-specific or if you experience usage downtime problems.
Detailed information to be found
in the online help function of the CDS (Configuration & Diagnostic Software)
in the user manual for the CDS
Conduct an extended diagnosis of the UE402 as follows:
Connect the PC/notebook in which CDS has been installed to the receiver of the safety
light curtain C4000.
Carry out a diagnosis on the host of the C4000 receiver.
Device symbol C4000 Host (receiver), context menu Diagnostics, Show.
7,segment display (contd.)
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