Motor not Running:
- Check if the motor is connected to power and wiring is correct.
- Verify settings and parameters are correct.
- Assess if the load is too big or if the motor is damaged.
- Check for any malfunction protection that may have been triggered.
- If necessary, reduce the load and consult Table 1-1 for further guidance.

    Wrong Direction of Motor Running:
- Ensure U, V, and W wiring is correct.
- Check if parameters settings are correct.
- Correct any wiring issues and set parameters correctly to resolve.

    Motor Turning but Speed Change not Possible:
- Verify wiring for lines with given frequency is correct.
- Check if the running mode setting is correct.
- Assess if the load is too big and reduce if necessary.
- Correct any wiring or setting issues.

    Motor Speed Too High or Too Low:
- Check if the motor's rated value and drive ratio are correct.
- Verify if inverter parameters are set correctly.
- Check if inverter output voltage is abnormal.
- Review motor nameplate data, drive ratio settings, and parameter settings. Adjust the V/F characteristic value if needed.

    Motor Running Unstable:
- Assess if the load or load change is too big and reduce if necessary.
- Check for phase loss or motor malfunction.
- Increase capacity or correct wiring to stabilize operation.

    Power Trip:
- Check if the wiring current is too high.
- Review input wiring and select a matching air switch.
- Reduce load and check for any inverter malfunction.

By systematically checking these items and implementing the countermeasures, you can diagnose and resolve common issues with motors in VFD systems.

    Err0 - Prohibition modify function code: This error occurs when there is an attempt to modify the function code while the VFD is running. To resolve this, make sure to modify the function code when the VFD is in a stopped status.

    Err1 - Wrong password: This error occurs when the wrong password is entered while the password protection is active. To resolve this, make sure to enter the correct password.

    O.C. - Over-current: This error can occur due to several reasons such as too short acceleration time, a short circuit at the output side, a locked rotor with the motor, or too heavy a load. To resolve this, consider prolonging the acceleration time, checking the motor cables, reducing the load, reducing the V/F compensation value, or measuring the parameters correctly.

    OC1 - Over-current 1: This is a specific type of over-current error that may require further investigation into the cause.

    OC2 - Over-current 2: Another specific type of over-current error that may require additional investigation.

    O.E. - DC Over-Voltage: This error can occur due to a high supply voltage, large load inertia, too short deceleration time, or abnormal settings in the rotary speed loop PID. To resolve this, check the rated voltage input, add a braking resistor if needed, increase the deceleration time, enhance the dynamic braking effect, or set the rotary speed loop PID parameters correctly.

    P.F1 - Input Phase loss: This error occurs when there is a phase loss in the input power. To resolve this, check if the power input is normal and if the parameter settings are correct.

    O.L1 - Inverter Overload: This error occurs when the load is too heavy for the inverter. To resolve this, reduce the load, check the drive ratio, or increase the inverter's capacity.

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