LED
Possible cause
Troubleshooting
Status LED
Operation LED
Alignment qual‐
ity LEDs
Ö
Yellow
o
o
Distance
between sender
and receiver is
too large
OR
Beam of sender
is not hitting the
receiver fully, or
receiver is not
aligned to sender
b
Check sensing
range
b
Checking the
alignment
O
Yellow
Status LED lights
up yellow even
though there is
an object in the
path of the beam.
o
o
The beam of the
single-beam pho‐
toelectric safety
switch is hitting
the receiver of
another (neigh‐
boring) single-
beam photoelec‐
tric safety switch.
b
Swap the
sender and
receiver
arrangement
at every sec‐
ond single-
beam photo‐
electric safety
switch
b
Ensure the
single-beam
photoelectric
safety
switches are a
sufficient dis‐
tance apart
Switching outputs do not behave in accordance with
•
IO-Link com‐
munication
•
Change of the
configuration
•
Short-circuit
b
Adjust config‐
uration
b
Check electri‐
cal connec‐
tions
No object in beam path, no output signal
The test input is
not connected
properly.
b
Check con‐
nection of the
test input
o
LED off.
Ö
LED flashes.
O
LED illuminates.
TROUBLESHOOTING
10
8024678/2020-01-24 | SICK
O P E R A T I N G I N S T R U C T I O N S | L25
37
Subject to change without notice