Schneider ATV31 Drives

Schneider ATV31 Drives Fault Codes:

Fault Code and MeaningCause and Remedy
bLF
Brake sequence
Cause:


  • Brake release current not reached.

  • Brake engage frequency bEn = nO (not adjusted) when brake logic bLC is assigned.




Remedy:

  • Check the drive/motor connection.

  • Check the motor windings.

  • Check the Ibr setting in the FUn- menu (see page 60).

  • Carry out the recommended adjustment of bEn (see pages 59 and 60).
CrF
Capacitor load circuit
Cause:

Load relay control fault or charging resistor damaged.



Remedy:

  • Replace the drive.
EEF
EEPROM fault
Cause:

Internal memory fault.



Remedy:

  • Check the environment (electromagnetic compatibility).

  • Replace the drive.
InF
Internal fault
Cause:


  • Short-circuit on the 10 V power supply.

  • Internal fault.




Remedy:

  • Check the circuits connected to the 10 V.

  • Check the wiring of inputs AI1 and AI2 and the connection to the RJ45 connector.

  • Check the environment (electromagnetic compatibility).

  • Replace the drive.
OCF
Overcurrent
Cause:


  • Incorrect parameters in the SEt- and drC- menus.

  • Inertia or load too high.

  • Mechanical blockage.




Remedy:

  • Check the SEt- and drC- parameters.

  • Check the size of the motor/drive/load.

  • Check the state of the mechanism.
SCF
Motor short-circuit
Cause:


  • Short-circuit or earthing at the drive output.

  • Significant earth leakage current at the drive output when several motors are connected in parallel.




Remedy:

  • Check the cables connecting the drive to the motor, and the motor insulation.

  • Reduce the switching frequency.

  • Connect chokes in series with the motor.
SOF
Overspeed
Cause:


  • Instability.

  • Driving load too high.




Remedy:

  • Check the motor, gain and stability parameters.

  • Add a braking resistor.

  • Check the size of the motor/drive/load.
tnF
Auto-tuning fault
Cause:


  • Special motor or motor whose power is not suitable for the drive.

  • Motor not connected to the drive.




Remedy:

  • Use the L or the P ratio (see Uft page 24).

  • Check the presence of the motor during auto-tuning.

  • If a downstream contactor is being used, close it during auto-tuning.
COF
CAnopen fault
Cause:

Interruption in communication on the CANopen bus.



Remedy:

  • Check the communication bus.

  • Please refer to the product-specific documentation.
EPF
External fault
Cause:

According to user.



Remedy:

  • According to user.
LFF
Loss of 4-20mA
Cause:

Loss of the 4-20 mA reference on input AI3.



Remedy:

  • Check the connection on input AI3.
ObF
Overvoltage during deceleration
Cause:

Braking too sudden or driving load.



Remedy:

  • Increase the deceleration time.

  • Install a braking resistor if necessary.

  • Activate the brA function (page 44) if it is compatible with the application.
OHF
Drive overheated
Cause:

Drive temperature too high.



Remedy:

  • Check the motor load, the drive ventilation and the environment. Wait for the drive to cool down before restarting.
OLF
Motor overload
Cause:


  • Triggered by excessive motor current.

  • Incorrect value of parameter rSC.




Remedy:

  • Check the ItH setting (motor thermal protection) (page 20), check the motor load. Wait for the drive to cool down before restarting.

  • Measure rSC again (page 24).
OPF
Motor phase loss
Cause:


  • Loss of one phase at drive output.

  • Downstream contactor open.

  • Motor not connected or motor power too low.

  • Instantaneous instability in the motor current.




Remedy:

  • Check the connections from the drive to the motor.

  • If a downstream contactor is being used, set OPL to OAC (FLt- menu page 67).

  • Test on a low power motor or without a motor: In factory settings mode, motor phase loss detection is active (OPL = YES). To check the drive in a test or maintenance environment without having to switch to a motor with the same rating as the drive, deactivate motor phase loss detection (OPL = no).

  • Check and optimize the UFr, UnS and nCr parameters and perform auto-tuning with tUn.
OSF
Overvoltage
Cause:


  • Line voltage too high.

  • Disturbed line supply.




Remedy:

  • Check the line voltage.
PHF
Line phase failure
Cause:


  • Drive incorrectly supplied or a fuse blown.

  • Failure of one phase.

  • 3-phase ATV31 used on a single phase line supply.

  • Unbalanced load.

  • This protection only operates with the drive on load.




Remedy:

  • Check the power connection and the fuses.

  • Reset.

  • Use a 3-phase line supply.

  • Disable the fault by setting IPL = nO (FLt- menu page 67).
SLF
Modbus fault
Cause:


  • Interruption in communication on the Modbus bus.

  • Remote terminal enabled (LCC = YES page 40) and terminal disconnected.




Remedy:

  • Check the communication bus.

  • Please refer to the product-specific documentation.

  • Check the link with the remote terminal.
CFF
Configuration fault
Cause:

The current configuration is inconsistent.



Remedy:

  • Return to factory settings or call up the backup configuration, if it is valid. See the FCS parameter in the I-O-, drC-, CtL- or FUn- menu.
CFI
Configuration fault via serial link
Cause:

Invalid configuration. The configuration loaded in the drive via the serial link is inconsistent.



Remedy:

  • Check the configuration loaded previously.

  • Load a consistent configuration.
USF
Undervoltage
Cause:


  • Line supply too low.

  • Transient voltage dip.

  • Damaged load resistor.




Remedy:

  • Check the voltage and the voltage parameter. USF trip threshold:


    • ATV31….M2: 160V

    • ATV31….M3X: 160V

    • ATV31….N4: 300V

    • ATV31….S6X: 430V


  • Replace the drive.