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  • The Technology Behind AC Motor Speed Control
    • July 06. 2021

    AC drive is a device that is used to control the speed of an electric motor. The speed is controlled by changing the frequency of the electrical supply to the motor. The three-phase voltage in the national electrical grid connected to a motor creates a rotating magnetic field in it. The rotor of the electrical motor will follow this rotating magnetic field. Motor Speed Control The speed is control...

  • AC Drive Universal Problems
    • July 14. 2021

    To ensure the AC drive functions reliably, proper considerations must be given to installation such as the specification of the motor, incoming, outgoing cables and the environmental parameter it operates in. As with any electrical types of equipment, AC drives can deteriorate after prolonged use even if it was installed properly. It helps to spot signs of imminent damage on the AC Drive early on ...

  • E5 Series Vector Control AC Drive Fault Code and Troubleshooting
    • July 16. 2021

    The following fault code will be displayed on the operation panel, the fault contact output operates, and the output to motor is disable, the motor will coast to stop. For details, refer to the following table to identify and correct the cause of the fault. Fault No. Fault display on panel Fault description Possible causes Corrective actions 1 E.oc1 Over current during acceleration Low grid voltag...

  • VTS Series AC Drive Fault Diagnostics Indications
    • July 20. 2021

    The following fault code will be displayed on the keypad, the fault contact output operates too. Even if a fault is the same, they are displayed differently on LCD keypad and LED keypad. These are all explained in the below table. For details, refer to the following table to identify and correct the cause of the fault. LCD keypad LED keypad F0−15 value Fault Name Possible causes Corrective actions...

  • V5/V6-GH/GA Series Crane Hoist AC drive Fault Code and Troubleshooting
    • July 22. 2021

    Fault number Fault Code Fault Description Possible Causes Countermeasure 1 E.oc1 Over current protection when acceleration operation Low grid voltage Check input power supply Startup during motor free rotation Restart after the motor standstill Rotating inertial of load is too large or shock load is too heavy Increase the acceleration time and reduce the sudden change of load Improper setting moto...

  • FV20-M Mini Compact AC Drive Fault Code Diagnosis
    • July 26. 2021

    FV20−M serial inverter is equipped with complete protection functions to provide efficient protection while utilizing its performance sufficiently. Some failure instructions may be displayed during operation. Compare the instructions with the following table and analyze,assess the causes and solve failures. Failure No. Failure code Failure description Potential causes Solutions Number 01 E. SC Out...

  • VTS30 Mini Book-style Variable Speed Drive Fault Code and Troubleshooting
    • July 28. 2021

    This chapter lists all the faults messages including the possible causes and corrective actions. If the drive faults, the drive output is disabled so that the drive stops controlling the motor, and the following fault code will be displayed on the keypad, the fault contact output operates too. Even if a fault is the same, they are displayed differently on LCD keypad and LED keypad. These are all e...

  • V5-H Series AC Motor Drive Fault and Alarm Information Troubleshooting
    • August 06. 2021

    Once a fault is detected, the following fault code will be displayed on the operation panel, the fault contact output operates, and the output to motor is disable, the motor will coast to stop. For details, refer to the following table to identify and correct the cause of the fault. Fault No.  Fault display on panel Fault description Possible causes Corrective actions 1 E.oc1 Over c...

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