ABB RVC Installation And Operating Instructions Manual page 27

Troubleshooting
Fault: The controller does not switch
on or off steps although there is a
considerable variable inductive load.
Solution
• 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.
Fault: The controller does not seem to
activate any steps.
Solution
Wait for the delay time between switching
and/or the power outage delay time.
Fault: One of the indicators flashes.
Solution
Normal situation when the actual inductive
current varies around the set sensitivity (C/k).
Fault: The preset power factor is not
achieved.
Solution
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
too low, the preset cos
Fault: All capacitors are switched on
although the required reactive power is
relatively low.
Check setting of phase and C/k values.
Fault: The controller is connected but
does not work (nothing on display).
Check the voltage setting.
Fault: The AutoSet procedure stops and
the controller displays an error messa-
ge 'FXX'.
Please identify the meaning of the error
message (see following table) and act
accordingly.
28
ϕ
over a period of time is
ϕ
may be increased.
Solution
Solution
Solution