• 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...

• 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 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 19. 2021

The ac drive controls the speed of the pump and fan by changing the electrical energy supplied rather than damping the air- or water flow. It is like reducing the speed of a car by pressing less on the accelerator instead of using the brake to slow down the speed. The payback time of an ac drive is typically one year or less. Other benefits of using ac drive to control the speed of fan or pump are...

• August 24. 2021

Drives are widely used in manufacturing industries to regulate and control rotating equipment such as fans, conveyors, machine spindles, and pumps, which are used in production processes. AC drives are widely used in process industries to increase the efficiency of equipment. It controls the speed of electric motors according to the process needs, typically reduces energy consumption by 35-40%. Ho...

• August 26. 2021

In modern industries, electric motors are playing a important role in modern technology. In an effort to decrease electric motor energy consumption in these energy-hungry devices―and optimize their efficiency―manufacturers have employed various drive-technologies to modify the motors' speed. These technologies, which include universal variable frequency drives (VFD, AC Drive Converter) and variabl...