E-11: Sequence Error

    The system signal has not been input to the input terminals.
    The input terminal function (130, 131) is not set.

    Solutions: Check if the sequence is correct. Set 130 or 131 as the input terminal.

E-12: Encoder Error

    The encoder circuit is disconnected.
    The encoder is not properly connected.

    Solutions: Check the encoder connection. Ensure the encoder is properly connected. Verify that parameter F376 corresponds to the encoder's phase-A and phase-B connections.

E-13: Speed Error (Overspeed)

    Encoder error (inverter error).
    Solutions: Check the encoder connection. Ensure the encoder is properly connected.

E-17: Key Malfunction Alarm

    The same key has been pressed continuously for more than 20 seconds.
    Solution: Check the operation panel.

E-18: Terminal Input Error

    The VI/II input signal cable is disconnected.
    The terminal control card is not inserted.

    Solutions: Check the VI/II input signal. Insert the terminal control card into the inverter. Check the P24 terminal for a short circuit between CC or CCA.

E-19: CPU2 Communication Error

    An error occurred during CPU2 communication.
    Solution: Call for service.

E-20: V/f Control Error

    An internal control error has occurred.
    Solution: Call for service.

E-21: CPU1 Error

    A software error has occurred in the control CPU.
    Solution: Call for service.

E-22: Abnormal Logic Input Voltage

    Abnormal voltage has been applied to the logic input terminal.
    Solution: Check the signal connected to the logic input terminal.

E-23: Option 1 Error

    Expansion I/O card 1 is faulty.
    Solution: Call for service.

E-24: Option 2 Error

    Expansion I/O card 2 is faulty.
    Solution: Call for service.

E-25: Position Hold Error

    A deviation error occurred during position hold control.
    The creep speed is too fast.

    Solutions: Check the encoder connection. Adjust the proportional P gain (F362). Reduce the creep speed.

E-26: CPU2 Error

    The motor control CPU is faulty.
    The driver circuit board in the inverter is damaged.

    Solution: Call for service.

E-29: Control Power Backup Low Voltage Error

    The control voltage between +SU and CC terminals is too low.

    The control power is not supplied through +SU and CC terminals.
    Parameter F647 is not set correctly.

    Solutions: Check if the voltage between +SU and CC terminals is DC20V or higher. Set parameter F647 to 0 (if the control power backup device is not used). Reset the inverter by turning it off and back on.

SOUt: Step Loss (PM Motors Only)

    The motor shaft is locked.
    An output phase is open.
    A shock load has been applied.

    Solutions: Release the motor shaft from the lock. Check the connection cables between the inverter and motor.

PrF: Power Cutoff Circuit Error

    Power cutoff circuit error.
    Solution: Call for service.