7XV5662-0AC01
English
C53000-B1174-C165-4
49
Troubleshooting
The following table helps you to eliminate the possible causes of problems that may arise
during commissioning.
Table 3
Possible problems
No.
Signal
Cause
Check this
Remedy
1
Red LED
“Line
Activation” does
not shine
Both CC–CO are in
slave mode
Check the jumper
positions for mas-
ter and slave
Configure one
master and one
slave
Line interrupted
Check loop by
bridging one of
the line ends
Replace line if
necessary
2
Red LED “Line
Activation”
shines
continuously
Line not suitable (too
long, attenuation too
high, conductor
cross-section too
small)
Check length,
cross-section,
attenuation
Replace line if
necessary
Both CC–CO are in
master mode
Check the jumper
positions for mas-
ter and slave
Configure one
master and one
slave
3
Yellow LED
“Line
Transparent”
does not shine
No communication
link could be estab-
lished
See items 1 and 2
See items 1 and 2
4
Yellow LED
“Data
Transfer” does
not flash
No valid user data
from protection
device
Bridge the FO
interface using
the FO cable
Return CC–CO to
Siemens, if nec-
essary (contact
see last page)
Perform ’Test’
mode with protec-
tion device con-
nected
FO cable must be
replaced, or pro-
tection device is
defective
5
LEDs „Line Acti-
vation”, „Line
Transparent”
and „Data Trans-
fer“ don‘t shine
LEDs defective
Push button,
LEDs must flash
Return CC–CO to
Siemens, if nec-
essary (contact
see last page)
6
GOK relay could
not be activated
Relay defective
Push button,
relay must be
activated
FO cable must be
replaced, or pro-
tection device is
defective
