Flowserve NRS1-40.1 - Manual (Page 22)

22
System Malfunctions
– continued –
Systematic fault finding procedure for system malfunctions
The sources of malfunctions occuring in CAN bus systems operating with several bus-based stations must
be analysed systematically since faulty components or incorrect settings can give rise to negative interac-
tions with intact bus devices in the CAN bus system. These unwanted interactions can cause error mes-
sages in fully functional bus devices, which will make fault detection even more difficult.
We recommend the following systematic fault finding procedure:
Step 1 (Start)
Detach
terminal strips
in all Bus sensors.
Level electrode
Conductivity electrode
Pressure sensor
Temperature sensor
etc.
Step 2
Plug in terminal strip
of the sensor
of the system
e. g. NRS ...
and
NRG... (electrodes)
Check
Use fault-finding
list to identify
the fault(s) !
Final test
Have all faults
been eliminated ?
System Fault
Use fault-finding
list to identify
the malfunction.
Cut off power supply
to the equipment !
Step 3
Apply mains voltage
to bus devices
of the system
e. g. NRS ...
and
NRG...
Sy stem O.K.
Detach
terminal strips
between bus devices
of the system
e. g. NRS...
and
NRG...
Check next system