U-Line H-2957 Manual page 10

CODE NAME
tnF Auto-tuning
LFF 1
Al current lost fault
ObF Overbraking
OHF Drive overheat
OLC Process overload
OLF
Motor overload
OPF 1
1 output phase loss
OPF 2 3 output phase loss
OSF
Main overvoltage
PAGE 10 OF 17
fREQUENCY DRIVE CONTINUED
POSSIBLE CAUSES
• Motor not connected to the drive
• One motor phase loss
• Special motor
• Motor is rotating (being driven by the load, for
example)
Detection if:
• Analog input Al1 is configured as current
• Al1 current scaling parameter of 0%
greater than 3 mA
• Analog input current is lower than 2 mA
• Braking too sudden or driving load too high
• Drive temperature too high
• Process overload
• Triggered by excessive motor current
• Loss of one phase at drive output
• Motor not connected
• Motor power too low, below 6% of the drive
nominal current
• Output contactor open
• Instantaneous instability in the motor current
• Line voltage too high:
- At drive power on only, the supply is 10% over the
maximum acceptable voltage level
- Power with no run order, 20% over the maximum
line supply
• Disturbed line supply
REMEDY
• Check that the motor/drive are compatible
• Check that the motor is present during auto-
tuning
• If an output contactor is being used, close it
during auto-tuning
• Check that the motor is completely stopped
• Check the terminal connection
CrL 1
is
• Increase the deceleration time
• Install a module unit with a braking resistor if
necessary
• Check the line supply voltage, to be sure that
it is under the maximum acceptable (20% over
maximum line supply during run status
• Check the motor load, the drive ventilation
and the ambient temperature. Wait for the
drive to cool down before restarting. See
mounting and temperature conditions
• Check the process and the parameters of the
drive to be in phase
• Check the setting of the motor thermal
protection, check the motor load
• Check the connections from the drive to the
motor
• In case of using downstream contactor, check
the right connection, cable and contactor
• Check the connections from the drive to the
motor
• Test on a low power motor or without a motor:
In factory settings mode, motor phase loss
detection is active Output Phase loss detection
OPL yES
=
maintenance environment, without having to
use a motor with the same rating as the drive,
deactivate motor phase loss detection Output
Phase loss detection
• Check and optimize the following parameter:
IR compensation (law U/F)
UnS
voltage
and perform an Auto-tuning
• Check the line voltage
. To check the drive in a test or
OPL nO
=
UFr
. Rated motor
nCr
and Rated motor current
tUn
.
0411 IH-2957