Technical documentation
Rev. 02
Reactive Factor Controller CX plus
75
17.2 Problems during the AI / cancellation of the AI
If the automatic initialisation cannot identify the phase angle during a maximum of 4 cycles, the AI is
cancelled with error message:
The messages
and
are shown alternatingly on the display.
The control was switched off by the AI (“OFF”): The messages “PFC” and “OFF” are shown
alternatingly on the display.
Possible causes:
1) The measuring current was too small. The current transformer ratio may be too large or the
step sizes are too small.
Check the current transformer ratio; select a transformer with the appropriate transmission
ratio, if necessary. Start the AI gain.
2) Heavy load fluctuations during the
automatic initialisation
Start the AI again when the mains is steadier.
3) No steps identified at the step outputs. Check fuses and power contactors. Start the AI again.
If the AI is not successful after several attempts, the correct phase correction angle
must
be entered
manually (SETUP/206).
The not occupied step outputs can be set to the step type “
FOFF
” manually
(SETUP/100/OUt).
Instruction regarding the setting of the phase correction angle:
A table with the phase correction angles depending on the connection of measuring voltage and
current can be found in the
annex, paragraph Setting of phase correction angles
.
If a phase angle equal to or greater than 360° results by adding 180°, subtract 180° instead.
Example:
Previously set phase correction angle = 270°
270° + 180° = 450°
greater than 360°
270° - 180° = 90°
phase correction angle to be set
NOTE:
If the automatic initialisation was cancelled with error once, the control is switched off. After the
repeated start and the successful execution of the AI or by manually setting the phase correction
angle and setting the step types of the not occupied switching outputs to “FOFF”, the control
(SETUP/100/PFC or SETUP/310) must explicitly be switched on again by switching the setting the
“ON”. The step types of the individual switching outputs (SETUP/100/Out or SETUP/403) should be
checked after the AI with regard to whether all connected steps are still set to the step type “AUTO”
and all not connected steps are set to “FOFF”. These may have to be corrected manually. If the
automatic initialisation was activated in the SETUP/100/AI or SETUP/207 resp. for as long as the
setting is activated (AI was not started yet) or for as long as the AI is being executed (
is shown on
the display in the top line in the main menu), the MANUAL menu remains locked. It is not possible to
switch the steps manually.
