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switching delay time).
Troubleshooting
Faults
The controller is connected but does not
work (nothing on display)
The controller does not switch on or off
steps although there is a considerable
variable inductive load.
The controller does not seem to activate
any steps.
The preset power factor is not achieved.
All capacitors are switched on although
the required reactive power is relatively
low.
After the automatic commissioning stops and the controller displays one of the
following messages:
Messages during an automatic
commissioning process
Phase rotation was detected to be wrong.
L2 and L3 phases will be internally
inverted. Press OK to validate.
Error: Step size too small
Error: CT not sensing any current
Error: Load changing too fast
Error: Too wide phase dispersion in input
nr 'X' 'Y' 'Z'
Error: At least two CT input sensing the
same line current
Error: No significant current in input nr
'X' 'Y' 'Z'
Error: Inconsistent phase shift
Recommended actions
Check the voltage setting and the fuses.
Check that the controller is in automatic Mode.
Check setting of phase shift and C/k.
Check that the CT short-circuit bridge is removed.
Wait for the delay time between switching and/or the
power outage delay time.
At low or no load, a low power factor can correspond
to a very small inductive current. The corresponding
capacitor steps are too large for compensation.
If the
average cos j over a period of time is too low, the
preset cos j may be increased.
Check setting of phase and C/k values.
Recommended actions
Press OK
Adapt the step size or the CT ratio.
Check that the CT's short-circuit bridges is removed,
that CT's connections are correctly wired and start the
Auto commissioning again.
Restart the Auto commissioning procedure under
more stable conditions or set the parameters
manually.
For each CT input and for each output, phase
recognition is done and phase dispersion is checked.
Check capacitor and contactor connections.
Check capacitor currents for each phase.
Check CT's installation
Check that CT's short-circuit bridge is removed , that
CT's connections are correctly wired and start the Auto
commissioning again
Check CT's connections and installation.
Check capacitor and contactor connections.
Check capacitor currents for each phase.
Manual Power Factor Controller RVT ç Appendices 71
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