52
The phase correction angle
was set incorrectly or
identified as incorrect by the
AI.
Offset reactive power
(Q offset) is set.
Or check the phase
correction angle
(SETUP/206) in the SETUP
menu, correct it, if
necessary.
A transformer is also
compensated by the
compensation system. The
displayed cos
corresponds to the cos
upstream of the
transformer.
If there is no reason for a
set Q offset, check the
setting of the Q offset
(SETUP/312) and set it to 0
var, if necessary.
The power factor does not
change after switching one or
several stages.
Stages are switched off again.
The current transformer is
positioned incorrectly.
(Current transformer installed
downstream of the exit to the
compensation system
the
controller only sees the load,
thus there is no reactive
power change in the supply
line.)
Stages are defective.
Check the installation
position of the current
transformer according to
the wiring diagram (the
transformer must be
installed upstream of the
exit to the compensation
system, so that the current
of the load and of the
compensation is recorded),
correct it, if necessary.
Check the capacitor stages;
fuse, power contactor or
capacitor may be defective
change components
Alarm
PFC
ALARM
Permanent
overcompensation / under-
compensation
(The controller could not
reach the target COS-PHI
after a 75-fold switching time,
because no suitable stage is
available for switching on
resp. off (Q > smallest stage)
Check the target COS-PHI
settings.
Check the power
contactors, the contactor
contact may be stuck
together or the contactor
coil may be defective.
Check the settings of all
stage types (stages may be
set to
“FON”
permanently switched on or
set to “FOFF”
deactivated)
Check the relation of the
current to the original stage
size of the individual
stages, the power loss of
one or several stages may
be too high
change the
affected stages, if
necessary.
Check if one or several
stages were identified as
defective and were locked
check the capacitors,
fuses and power
contactors. Set the stage
