- OCF (Overcurrent)
Description: Parameters in the [SETTINGS] (SEt-) and [1.4 MOTOR CONTROL] (drC-) menus are not correct. Inertia or load too high. Mechanical locking.
Cause: Incorrect parameter settings, high inertia or load, or mechanical locking.
+ Solution: Check the parameters in the [SETTINGS] (SEt-) and [1.4 MOTOR CONTROL] (drC-) menus. Check the size of the motor/drive/load. Check the state of the mechanism.

- PrF (Power removal)
Description: Fault with the drive's "Power removal" safety function.
Cause: There may be an issue with the drive's power removal safety function.
+ Solution: Inspect and repair the drive.

- SCF1 (Motor short circuit)
Description: Short-circuit or grounding at the drive output. Significant earth leakage current at the drive output if several motors are connected in parallel.
Cause: There could be a short-circuit or grounding issue, or significant earth leakage current if multiple motors are connected in parallel.
+ Solution: Check the cables connecting the drive to the motor and the motor insulation. Perform diagnostic tests via the [1.10 DIAGNOSTICS] menu. Reduce the switching frequency. Connect chokes in series with the motor. Check the adjustment of the speed loop and brake. Increase the [Time to restart] (ttr) on page 66.

- SCF2 (Impedant sh. circuit)
Description: Impedance short circuit.
Cause: There may be an impedance short circuit in the drive or motor circuit.
+ Solution: Check the drive and motor circuit for any impedance issues.

- SCF3 (Ground short circuit)
Description: Ground short circuit.
Cause: There may be a short circuit to ground in the drive or motor circuit.
+ Solution: Check the drive and motor circuit for any grounding issues.

- SOF (Overspeed)
Description: Instability or driving load too high.
Cause: The motor may be unstable or the driving load may be too high.
+ Solution: Check the motor, gain, and stability parameters. Add a braking resistor if needed. Check the size of the motor/drive/load. If the [FREQUENCY METER] (FqF-) function is configured, check its parameter settings on page 238.

- SPF (Speed feedback loss)
Description: Encoder feedback signal missing or signal on "Pulse input" missing if the input is used for speed measurement.
Cause: There may be an issue with the encoder feedback signal or the "Pulse input" signal.
+ Solution: Check the wiring between the encoder and the drive. Inspect the encoder. Check the wiring of the input cable and the detector used.

- tnF (Auto-tuning)
Description: Special motor or motor whose power is not suitable for the drive, or motor not connected to the drive.
Cause: The motor may be special or not suitable for the drive's power, or it may not be connected to the drive.
+ Solution: Check that the motor and drive are compatible. Ensure that the motor is present during auto-tuning. If an output contactor is being used, close it during auto-tuning.

- APF (Application fault)
Description: Controller Inside card fault.
Cause: There may be an issue with the Controller Inside card.
+ Solution: Refer to the card documentation for troubleshooting and repair.

- bLF (Brake control)
Description: Brake release current not reached. Brake engage frequency threshold [Brake engage freq] (bEn) only regulated when brake logic control is assigned.
Cause: There may be an issue with the drive/motor connection or the motor windings.
+ Solution: Check the drive/motor connection and the motor windings. Check the [Brake release I FW] (Ibr) and [Brake release I Rev] (Ird) settings on page 164. Apply the recommended settings for [Brake engage freq] (bEn).

- CnF (Com. network)
Description: Communication fault on communication card.
Cause: There may be an issue with electromagnetic compatibility, wiring, or a timeout.
+ Solution: Check the environment for electromagnetic compatibility. Check the wiring and the timeout. Replace the option card if necessary. Inspect and repair the drive.

- COF (CANopen com.)
Description: Interruption in communication on the CANopen bus.
Cause: There may be an issue with the communication bus or a timeout.
+ Solution: Check the communication bus and the timeout. Refer to the CANopen User's Manual for further guidance.

- EPF1 (External flt-LI/Bit)
Description: Fault triggered by an external device, depending on the user.
Cause: An external device may have caused a fault.
+ Solution: Check the device that caused the fault and reset it.

- EPF2 (External fault com.)
Description: Fault triggered by a communication network.
Cause: There may be an issue with the communication network.
+ Solution: Check for the cause of the fault and reset it.

- FCF2 (Out. contact. open.)
Description: The output contactor remains open although the closing conditions have been met.
Cause: There may be an issue with the contactor or its wiring.
+ Solution: Check the contactor and its wiring. Check the feedback circuit.

- LCF (input contactor)
Description: The drive is not turned on even though [Mains V. time out] (LCt) has elapsed.
Cause: There may be an issue with the contactor, its wiring, or the timeout.
+ Solution: Check the contactor and its wiring. Check the timeout. Check the line/contactor/drive connection.

- LFF2, LFF3, LFF4 (AI2, AI3, AI4 4-20mA loss)
Description: Loss of the 4-20 mA reference on analog input AI2, AI3, or AI4.
Cause: There may be an issue with the connection on the analog inputs.
+ Solution: Check the connection on the analog inputs.

- ObF (Overbraking)
Description: Braking too sudden or driving load.
Cause: The braking may be too sudden or the driving load may be too high.
+ Solution: Increase the deceleration time. Install a braking resistor if necessary. Activate the [Dec ramp adapt.] (brA) function on page 142 if it is compatible with the application.

- OHF (Drive overheat)
Description: Power board -PCB over temperature, braking unit over temperature, phase module over temperature, rectifier over temperature.
Cause: There may be an issue with the motor load, drive ventilation, or ambient temperature.
+ Solution: Check the motor load, the drive ventilation, and the ambient temperature. Wait for the drive to cool down before restarting.

- OLF (Motor overload)
Description: Triggered by excessive motor current.
Cause: The motor current may be excessive.
+ Solution: Check the setting of the motor thermal protection and the motor load. Wait for the drive to cool down before restarting.

- OPF1 (1 output phase loss)
Description: Loss of one phase at drive output.
Cause: There may be an issue with the connections from the drive to the motor.
+ Solution: Check the connections from the drive to the motor.

- OPF2 (3 motor phase loss)
Description: Motor not connected or motor power too low.
Cause: Could be due to an open output contactor or instantaneous instability in the motor current.
+ Solution: Check the connections from the drive to the motor. If an output contactor is being used, parameterize [Output Phase Loss] (OPL) = [Output cut] (OAC) on page 227. Test on a low power motor or without a motor: In factory settings mode, motor phase loss detection is active [Output Phase Loss] (OPL) = [Yes] (YES). To check the drive in a test or maintenance environment, deactivate motor phase loss detection [Output Phase Loss] (OPL) = [No] (nO). Check and optimize the following parameters: [IR compensation] (UFr) on page 76, [Rated motor volt.] (UnS) and [Rated mot. current] (nCr) on page 70, and perform [Auto-tuning] (tUn) on page 71.