Fault Tracing - ABB PQFS Installation, Operation And Maintenance Instructions

11.4.2 Fault tracing

Symptom
No display on PQF-
Manager.
All the indicator LEDs on
the electronic card (LEDs)
remain OFF.
No display on PQF-
Manager.
All the indicator LEDs on
the electronic cards (LEDs)
are functioning properly.
After applying auxiliary
power to the system, the
PQF-Manager shows the
message 'Initializing
communication. Please
wait... none of the LEDs of
the main controller board is
functioning.
Table 58: Power supply problems
Cause
The active filter
(auxiliaries) is/ (are) not
energized or no power
supplied to the filter.
The auxiliary transformer
is not set according to
the network voltage.
The 24 Vdc power supply
feeding the controller
board has failed or the
cabling between the
power supply and main
controller is loose or
main controller board
faulty
Manual Power Quality Filter PQFS  Troubleshooting guide 191
What to do
−
Check if the
protection (fuses,
disconnector ...)
feeding the active
filter are OK.
−
Check if the auxiliary
fuse box is closed
and the fuses are OK.
−
Check the mains and
auxiliary supply
voltages.
−
Check the selection
of the tap on the
auxiliary transformer.
−
Check the supply
voltage to see that it
is within the
tolerance range of
the nominal filter
settings.
−
Check the 24 V power
supply feeding the
control board.
−
Check the feeding
cable between the
main power and the
24 V power supply.
−
Check the feeding
cable between the
control boards and
the 24 V power
supply.