Siemens SIPROTEC 7SS523 V3.2 Manual page 303

Reset of the ZPS
modules
SV module
8.2.4 Analysis of Internal Communication Failures
The green LED shines when the module is running without faults. The red LED is lit in
the event of a module failure. In the event of failure of a configured bay, but normal
function of the module, the green LED flashes in addition to the shining red LED.
To reset a central processor module (ZPS):
Press the pushbutton S5 on the module. The button is located below the LEDs
(Figure A-7, page 340). When you reset the ZPS-SBK module, the central unit is
restarted, and the setting parameters related to the bay units are updated.
Table 8-4 LEDs of the SV module
LED Colour
designation
+ 5 V Green
+ 15 V Green
− 15 V Green
+ 15 V Green
− 15 V Green
+ 24 V Green
LED ON means that the corresponding auxiliary voltage is available.
If the LED indication fails completely, check the auxiliary voltage supply (Chapter
8.2.2, page 285), replace the fine-wire fuse (Chapter 8.4.2, page 297).
The following components of the protection participate in the protection-internal fast
data transmission (Figure 8-1, page 287):
Figure 8-1 Components for data transmission
If the protection system is blocked, the cause may be a failure in the communication
system, or in a bay unit. The faulty bay is shown in the alarm list which can be called
up by pressing the function key F1 on the central unit.
Auxiliary voltage for supply of the processor modules and for the
alarm relay "device failure"
Auxiliary voltage not used for the central unit
Auxiliary voltage exclusively for contrast control of the
LC display
Alarm relay voltage
Auxiliary voltage not used for the central unit
Alarm relay voltage
7SS52 V4 Manual
C53000-G1176-C182-1
Fault Analysis
Function
287