OCF [Overcurrent]: This error occurs when parameters in the [SETTINGS] (SEt-) and [1.4 MOTOR CONTROL] (drC-) menus are incorrect, the inertia or load is too high, or there is mechanical locking. Check the parameters, motor/drive/load size, and the state of the mechanism to resolve this issue.

    PrF [Power removal]: This error indicates a fault with the drive's "Power removal" safety function. Inspect or repair the drive to address this issue.

    SCF1 [Motor short circuit]: This error suggests a short-circuit or grounding at the drive output, or significant earth leakage current if several motors are connected in parallel. Check the cables, motor insulation, and perform diagnostic tests. Consider reducing the switching frequency, connecting chokes in series with the motor, and adjusting the speed loop and brake. If using the [Energy Sav.] (nLd) motor control type, switch to a U/F type.

    SCF2 [Impedant sh. circuit] and SCF3 [Ground short circuit]: These errors indicate issues with short circuits. Check the wiring and insulation, and perform diagnostic tests to resolve these issues.

    SOF [Overspeed]: This error occurs when there is instability or the driving load is too high. Check the motor, gain, and stability parameters. Consider adding a braking resistor, checking the motor/drive/load size, and adjusting the parameter settings for the [FREQUENCY METER] (FqF-) function.

    SPF [Speed Feedback Loss]: This error occurs when the encoder feedback signal is missing or there is no signal on the "Pulse input" if it is used for speed measurement. To resolve this, check the wiring between the encoder and the drive, inspect the encoder, and verify the wiring of the input and the detector used.

    tnF [Auto-tuning]: This fault indicates an issue with auto-tuning, which could be due to a special motor or a motor whose power is not suitable for the drive, or the motor not being connected to the drive during auto-tuning. Ensure that the motor and drive are compatible, the motor is present during auto-tuning, and if an output contactor is being used, it should be closed during auto-tuning.

    APF [Application Fault]: This fault is related to a Controller Inside card issue. Refer to the card documentation for further details.

    CnF [Communication Network]: This error signifies a communication fault on the communication card. Check the environment for electromagnetic compatibility, inspect the wiring, verify the time-out, replace the option card if necessary, and inspect or repair the drive.

    COF [CAN Communication]: This fault occurs due to an interruption in communication on the CANopen bus. Check the communication bus, verify the time-out, and refer to the CANopen User's Manual for further guidance.

    EPF1 [External Fault - LI/Bit]: This fault is triggered by an external device, depending on the user's configuration. Check the device that caused the fault and reset it.

    EPF2 [External Fault Communication]: This error is triggered by a communication network. Check for the cause of the fault and reset it.

    FCF2 [Output Contactor Open]: This fault indicates that the output contactor remains open although the closing conditions have been met. Check the contactor and its wiring, and inspect the feedback circuit.

    Fd1 [Damper Stuck]: This fault occurs when the damper remains closed although the opening conditions have been met. Check the damper and its wiring, inspect the feedback circuit, and verify the time delay for the function.

    LCF [Input Contactor]: This error indicates that the drive is not turned on even though the [Mains V. time out] (LCt) has elapsed. Check the contactor and its wiring, verify the time-out, and inspect the line/contactor/drive connection.

    LFF2, LFF3, LFF4 [AI2, AI3, AI4 4-20mA Loss]: These faults indicate a loss of the 4-20 mA reference on analog input AI2, AI3, or AI4. Check the connection on the analog inputs and, if necessary, modify the fault configuration via the [AIx 4-20mA loss] (LFLx) parameter.

    nFF [No Flow Fault]: This fault occurs when there is zero fluid. Check and rectify the cause of the fault, and verify the zero fluid detection parameters.

    ObF [Overbraking]: This error is triggered by sudden braking or a high driving load. Increase the deceleration time, install a braking resistor if necessary, and activate the [Dec ramp adapt.] (brA) function if compatible with the application.

    OHF [Drive Overheat]: This fault occurs when there is an over-temperature condition in the power board, braking unit, phase module, or rectifier. Check the motor load, drive ventilation, and ambient temperature. Wait for the drive to cool down before restarting.

    OLC [Process Overload Fault]: This error indicates a process overload. Check and remove the cause of the overload, and verify the parameters of the [PROCESS UNDERLOAD] (OLd-) function.

    OLF [Motor Overload]: This fault is triggered by excessive motor current. Check the setting of the motor thermal protection, inspect the motor load, and wait for the drive to cool down before restarting.

    OPF1 [1 Motor Phase Loss]: This error occurs when there is a loss of one phase at the drive output. Check the connections from the drive to the motor.

    OPF2 [3 motor phase loss]: This error indicates a loss of three phases at the drive output, which could be due to a motor not being connected, the motor power being too low, an open output contactor, or instantaneous instability in the motor current. To remedy this, check the connections from the drive to the motor, ensure the output contactor is parameterized correctly, test on a low power motor or without a motor if necessary, and check and optimize certain parameters such as IR compensation, rated motor voltage, and rated motor current.

    OSF [Mains overvoltage]: This error is triggered by a line voltage that is too high or a disturbed line supply. To resolve this, check the line voltage.

    OtF1 [PTC1 overheat]: This error indicates overheating of the PTC1 probes. To address this, check the motor load and size, motor ventilation, and wait for the motor to cool before restarting. Also, check the type and state of the PTC probes.

    OtF2 [PTC2 overheat]: Similar to OtF1, this error indicates overheating of the PTC2 probes.

    OtFL [LI6=PTC overheat]: This error indicates overheating of PTC probes detected on input LI6.

    PtF1 [PTC1 probe]: This error indicates that the PTC1 probes are open or short-circuited. To remedy this, check the PTC probes and the wiring between them and the motor/drive.

    PtF2 [PTC2 probe]: Similar to PtF1, this error indicates that the PTC2 probes are open or short-circuited.

    PtFL [LI6=PTC probe]: This error indicates that the PTC probes on input LI6 are open or short-circuited.

    SCF4 [IGBT short circuit]: This error indicates a fault in the power components, possibly an IGBT short circuit. To address this, perform a diagnostic test and inspect or repair the drive.

    SCF5 [Motor short circuit]: This error indicates a short circuit at the drive output. To resolve this, check the cables connecting the drive to the motor and the motor's insulation, perform diagnostic tests, and inspect or repair the drive.

    SLF1 [Modbus com.]: This error indicates an interruption in communication on the Modbus bus. To remedy this, check the communication bus, the time-out, and refer to the Modbus User's Manual.

    SLF2 [PC com.]: This error indicates a fault in communication with PC software. Check the PC software connecting cable and the time-out to resolve this.

    SLF3 [HMI com.]: This error indicates a fault in communication with the graphic display terminal. To address this, check the terminal connection and the time-out.

    SPIF [PI Feedback]: This error indicates that the PID feedback is below the lower limit. To remedy this, check the PID function feedback and the PID feedback supervision threshold and time delay.

    SSF [Torque/current lim]: This error indicates a switch to torque limitation. To resolve this, check for any mechanical problems and the parameters of the torque limitation function.

    tJF [IGBT overheat]: This error indicates that the drive has overheated, possibly due to the IGBTs. To address this, check the size of the load/motor/drive, reduce the switching frequency, and wait for the motor to cool before restarting.

    ULF [Proc. Underload Flt]: This error indicates a process underload. To remedy this, check and remove the cause of the underload and check the parameters of the process overload function.