Operating Instructions
Chapter
8
UE4740
8020182/1CUO/2022-08-26
©
SICK AG • Industrial Safety Systems • Germany • All rights reserved
29
Subject to change without notice
Fault diagnosis
8.3
Error displays of the LEDs
This section explains what the LED error displays mean and how you can respond. Please
refer to the description in the section 3.2
12ff.
8.3.1
Error displays of the EFI gateway
Display
Possible cause
How to remedy the error
PWR
No power supply
Check the voltage supply and
activate, if necessary.
Red
Internal voltage supply too
low or firmware is being
updated
If necessary, check the voltage
supply.
DIA
Red
Configuration has not been
completed or is being
transferred
The display goes off automatically
once the configuration has been
successfully transferred.
If the display does not go off:
Check the configuration of the
system using the CDS
(Configuration & Diagnostic
Software).
Re-transfer the corrected
configuration to the system.
Red
1 Hz: System error
(lock-out)
Check the device state by means of
the CDS diagnostics.
Eliminate any errors.
Disconnect the EFI gateway briefly
from the supply voltage.
If the problem persists, replace the
EFI gateway.
EFI1
and
EFI2
Red
Device communication error
at the EFI connection
Device not connected. Check the
connecting cable.
Device is not configured for the EFI
connection. Configure it using the
CDS (Configuration & Diagnostic
Software).
Tab. 8: Error displays of the
LEDs at the EFI gateway