Troubleshooting
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7
Troubleshooting
7.1
What to Do in the Event of a Fault
Check that the following actions have been taken:
■
Plant test according to the following checklist
■
Telephone assistance obtained from the Support team to isolate the
problem
Checklist for fault repair
If you were unable to rectify the fault with any of the suggested measures, contact
the Support team. Have the exact model number of the sensor ready if
appropriate.
Error
Displays
Cause
Remedy
P
W
R
E
R
R
L
A
N
O
P
T
No display
Off
Off
Off
Off
The power
supply is
switched off or
there is a wiring
fault in the
distribution panel
or switch cabinet.
Check whether
there is a reason
why the power
supply is
switched off
(installation or
maintenance
work, etc.).
Switch on the
power supply if
appropriate.
Check the wiring
carefully and
repair any faults
with the wiring.
No network
connection
On
Off
Network cable
not connected or
incorrectly
connected
Port on the
network switch is
deactivated
Check the
connection to the
next device: LAN
LED
Activate the port
on the network
switch
No optical
communication
On
On
Off
Receiving level
too low, transfer
blocked
Improve
alignment or
incorrect pairing;
F1+F2 required
Bar graph
display does
not reflect full
value despite
precise
alignment
On
Off
On
On
Not an error;
individual scaling
deviation in the
highest signal
strength range
None
LS684*
