LED
Possible cause
Troubleshooting
PWR
ERR
Ö
Yellow
Ö
Red
The sender identified an internal
fault.
b
Switch the voltage supply off and
back on again.
b
If the fault persists, replace the
sender,
.
o
LED off.
Ö
LED flashes.
O
LED illuminates.
Receiver
Position of the LEDs:
see "Receiver displays", page 12
Table 10: Fault indication on the receiver
LEDs
Possible cause
Troubleshooting
OSSD
ERR
Alignment quality
1
2
3
4
O
Red
Ö
Red
Ö
Blue
o
o
o
An internal fault has occurred.
b
Switch the voltage supply
off and back on again.
b
If the fault continues to per‐
sist, replace the receiver,
see "Ordering information",
page 64
.
O
Red
Ö
Red
o
Ö
Blue
o
o
Fault in the supply voltage
b
Check the voltage supply
and the power supply
unit,
.
b
Switch the voltage supply
off and back on again.
b
If the fault continues to per‐
sist, replace the receiver,
see "Ordering information",
page 64
.
O
Red
Ö
Red
o
o
Ö
Blue
o
The receiver has recognized
beams from several senders.
b
Check the distance to send‐
ers of the same design.
Make sure that beams from
another sender cannot hit
the receiver,
against interference from
systems in close proximity
to each other", page 20
b
Switch the voltage supply
off and back on again.
O
Red
Ö
Red
o
o
o
Ö
Blue
A fault or unexpected status
was identified on the OSSDs
of the system connection
(e.g.,
overvoltage, short-circuit
to HIGH or short-circuit to LOW,
cross-circuit, permissible load
capacity exceeded)
b
Check the system wiring
for a fault. Make sure that
the OSSDs have been wired
correctly,
b
Switch the voltage supply
off and back on again.
b
If the fault continues to per‐
sist, replace the defective
components,
O
Red
Ö
Red
o
Ö
Blue
o
Ö
Blue
Permanent error in the voltage
supply.
b
Replace device,
o
LED off.
Ö
LED flashes.
O
LED illuminates.
TROUBLESHOOTING
10
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O P E R A T I N G I N S T R U C T I O N S | senSe2
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Subject to change without notice