30
13.2 Fault diagnosis receiver
LED
Possible cause
Troubleshooting
red
2 consecutive
pulses
Wrong configuration Check connections�
red
3 consecutive
pulses
Feedback external
contactor missing
Check connection pin 4�
red
4 consecutive
pulses
Interfering
transmitter detected
Find interfering transmitter and take one
of the following measures:
-Reduce the range of the interfering
transmitter from high to low�
-Exchange position of transmitter and
receiver�
-Change location of the interfering
transmitter so that the receiver is not
influenced�
-Screen the beams coming from the
interfering transmitter using a mat
protective device�
red
5 consecutive
pulses
Fault
OSSD outputs
Check connections�
If the defect remains, send device to ifm
branch for repair�
red
6/7 consecutive
pulses
Internal fault
Send device to ifm branch office for
repair�
yellow
Weak signal
-Check alignment of transmitter and
receiver�
-Clean front pane, check range�
-Waiting for restart pulse�