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Reasons / Solution
In case a value other than 1 for target- cos-phi is
pre-set, the display “<” may be illuminated
despite an inductive grid load. Arrows indicate
the control direction, not the grid conditions!
Check END STOP!
Check CONTROL-MODE!
Check whether in the menu ”Manual
operation/fixed steps“ particular steps have
been programmed as fixed steps or as OUT
Check allocation of outputs to capacitors:
In program mode HELP-button call page 7-9 >
table of allocations is displayed.
Check control-mode and END STOP!
Check programming and the capacitance of the
smallest stage.
Check programming and the values of the
current converters.
Check programming of the control series and
the capacitance of the capacitors.
Note: no display, alarm relay open
Fault
In inductive grid stages are switched
off resp. in capacitive grid conditions
stages are switched on
The controller does not connect all
stages or cos-phi does not change at the
last stages
Connected capacitor contactors are not
in line with the expected capacitor
stages.
The system permanently switches
capacitors on and off although the
number of consumers does not change
(system oscillating).
Operation voltage missing
