• 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...

• 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...

• 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...

• August 03. 2021

V&T E5-PA Special Inverter for Water Supply . For the characteristics of the water supply system, realizing the application requirements of multi-pump switching through single inverter, solving the impact of the start-up on the grid during the water supply process, and the sudden surge of the motor causes the system to surge, and it completely eliminates the water hammer phenomenon. The intern...

• August 09. 2021

FAQ I. Why have abnormal operation in vector control 2 without encoder speed feedback? (1) Check if there exists large difference between the motor rated current and inverter rated current (2) Check if complete motor data identification has been performed (3) Check if the lines for Hall sensor is loosen or dislocated for V5−H−4T18.5G/22L and above power class II. Why have abnormal operation in vec...

• August 13. 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...

• August 17. 2021

I.Why occur over current trip or over load trip in vector control 2 with encoder speed feedback? Check the parameter settings: (1)Check if the motor parameters are properly set (2)Check if the encoder pulse Pd.21 is properly set (3)Check if the encoder direction parameter of Pd.22 is properly set (4)Check if the ratio between motor and encoder Pd.24 is properly set Check the hardware connection (1...

• August 30. 2021

When a variable frequency drive (VFD) is added to an existing system, many potential problems may arise. Reduced cooling at reduced speed Most motors running across the line depend on an internal, shaft-driven fan for cooling. When the motor is operated with a VFD, the motor shaft speed (motor speed) decreases and will cause decreased cooling from the shaft-driven fan. If the load is a standard va...