Operating Instructions
Chapter
10
UE 440/470
8 010 432/P097/14-03-05
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
83
Fault diagnosis
Display
Possible cause
How to remedy the error
T
O
-
Two input signals at the
connections of the
operating mode
selector switch are
identical (instead of
1-of-n).
Check the wiring for short-circuit.
Check the operating mode selector switch.
T
O
.
A signal combination
active at the inputs of
the operating mode
selector switch is not
configured.
Use an operating mode selector switch at
which only the configured operating modes
can be selected.
Check the UE 440/470 configuration with
the aid of the CDS.
T
O
/
Key-operated switch for
bypass or its wiring is
defective
Check the key-operated switch for bypass
and its wiring.
Check whether the configuration of the key-
operated switch for bypass (e.g.
complementary or equivalent circuit)
matches the construction.
Ensure that both contacts on the key-
operated switch for bypass are switched
within the configured discrepancy time.
T
O
0
Short-circuit after 24 V
at operating mode
selector switch
Check the wiring of the operating mode
selector switch.
Check the operating mode selector switch.
6
UE 440/470 defective
Send the safety controller to the
manufacturer for repair.
7
Overcurrent at a
1-channel output or
undercurrent at O1.3
Check for possible overload of connected
switching element.
Check the wiring of the connected switching
element.
7
O
(
Overvoltage at OSSD A,
connection 1
Check the wiring for short-circuit to 0 V.
Check the connected switching element.
Replace, if necessary.
7
O
)
Short-circuit at OSSD A,
connection 1
after 24 V
Check the wiring for short-circuit to 24 V.
7
O
*
Short-circuit at OSSD A,
connection 1
after 0 V
Check the wiring for short-circuit to 0 V.
7
O
+
Overvoltage at OSSD A,
connection 2
Check the connected switching element.
Replace, if necessary.
Check the wiring for short-circuit to 0 V.
7
O
,
Short-circuit at OSSD A,
connection 2
after 24 V
Check the wiring for short-circuit to 24 V.