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6.3 Notes on troubleshooting
Undercompensation, not enough stages are switched on.
Check controller for error messages If the target cos phi is set to 0.8 capacitive, you need
to start switching on capacitors. If the system is not over-dimensioned, almost all stages
need to be switched on.
Check the system's main fuse and group fuses. All values can be found in the enclosed
documents. The group fuses must display at least 1.7 times the value of the capacitor
power.
If the fuses blow despite being correctly selected, the groups must be checked individual-
ly for excessive current input and defective contactors.
Undercompensation, all stages are switched on.
The existing system is not sucient (e.g. due to new inductive consumers).
Please contact your local representative (enlarge your system). See the cover sheet of
these operating instructions for the service telephone number, or menu item Extras /
submenu 7.
Undercompensation, too many stages are switched on.
Check controller settings (target cos phi capacitive?).
Is the transformer installed in the wrong position?
Controller switches too often, in particular during light load times (at the weekend,
at night).
Check the transformer ratio conguration.
If necessary, (manually) switch a small stage on permanently.
Please call your local representative if you are unable to nd the cause of the error. The
phone number can be found on the cover sheet of these operating instructions or in the
menu item Extras / submenu Service
Troubleshooting
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