II K 6-27
Operating Instructions
Fault message
Fault no.
Definition /
Possible source
Param.
F 7 Converter Overtemp
see also A4
Converter Over Temperature
Temperature of the converter too
high.
Please wait until the temperature
of the converter has cooled
down. After that you can clear
the fault by pressing the Reset
button on the control panel.
Please check:
• fan supply
• fan components
• air inlet
• ambient temperature
• load cycle too high?
7.09
bit 6
F 8 Motor Overtemp
see also A5
Motor Over Temperature
Temperature of the motor too
high (if PTC resistor connected
to AI2).
Please wait until the motor has
cooled down. If you have any
digital output assigned to „Fan
On“ this output will be energized
until the temperature drops be-
low the alarm level. After that
you can clear the fault by pres-
sing the Reset button on control
panel.
Please check
• temperature sensor and its
cabling
• motor cooling
fan supply
direction of rotation
filter
• load cycle too high?
7.09
bit 7
F 9 Mains Undervoltage
see also A2
see also A8
Mains Undervoltage
Parameter Arm Volt Nom (1.02)
has to be in accordance to the
Main Supply Voltage, see ma-
nual chapter 2.2 table 2.2/4.
Otherwise a fault F09-Mains
Undervoltage (latest 10 sec
after ON command) or an alarm
A02-Mains Voltage Low (im-
mediately after ON command)
will occurs. During the Commis-
sioning Wizard that can happen
at any step when the drive is
switched on [Start Drive , Press
(I)]. To avoid fault F09-Mains
Undervoltage or alarm A02-
Mains Voltage Low set para-
meter Net Underv Trip (1.10) =
0…-10% before starting the
Commissioning Wizard again.
Refer also manual chapter 4.5.1
Monitoring the Mains Voltage.
7.09
bit 8
F 10 Mains Overvoltage
Mains Overvoltage
The mains voltage is higher than
120% of the rated converter
voltage. This limit is fixed.
Please switch off the drive and
measure the mains voltage.
7.09
bit 9
Fault message
Fault no.
Definition /
Possible source
Param.
F 11 Mains Sync Fault
see also A8
Mains Synchronization Fault
The synchronization to the mains
frequency has been lost during
operation.
Possible problems causes:
• Problems with the connec-
tion of the cable or with the
main contactor
• Blown fuses
• Mains frequency out of ran-
ge (47...63 Hz)
• Mains frequency not stable
or varying too fast
7.09
bit 10
F 12 Field Undercurrent
see also A8
Field Undercurrent
• If field weakening is needed
find out the minimum field
current at maximum field
weakening point (usually
written at motor name plate).
During Commissioning Wi-
zard set parameter Field
Low Trip (4.06) = 10% less
than minimum field current.
Otherwise could be F12-
Field Undercurrent occurs
during field weakening ope-
ration.
• It’s also possible that this is
a sequential fault of Mains
Undervoltage (F9 / A2).
Read the faultlogger to see
the fault history. DCS400 is
using a new method to mo-
nitor the mains voltage.
Could be Armature Voltage
Nominal and Mains Voltage
Actual doesn’ t corresponds
to each other. Correct it in
accordance to manual
chapter 2.2 - table 2.2/4 or
adapt parameter Net Underv
Trip (1.10) to a lower value.
• Depend on motor Field
Autotuning has detected a
very high Field Cur KP
(4.03) factor. That can result
in field current oscillation and
drive can trip either due to
field current overshoots F13-
Field Overcurrent or field
current undershoots F12-
Field Undercurrent. Set pa-
rameter Field Cur KP (4.03)
to a lower value and / or
Field Cur TI (4.04) to a
higher value. Try with default
values of these two pa-
rameters.
7.09
bit 11
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