Low Voltage Lv | Delta Electronics VFD007S23A manual

Chapter 7 Troubleshooting VFD-S Series

7.4 Low Voltage (Lv)

Low voltage

Is input power correct? Or power cut, Yes

including momentary power loss

Restart after reset

Check if there is any malfunction

Yes

Change defective component

component or disconnection in

and check connection

power supply circuit

Check if voltage is

Make necessary corrections,

such as change power supply

within specification

system for requirement

Yes

Check if there is heavy load

Yes

Using the different power

with high start current in the

supply for this drive and

same power system

heavy load system

Check if Lv occurs when

Yes

Suitable power

breaker and magnetic

transformer capacity

contactor is ON

Check if voltage between +1/+2

and - is greater thanNo 200VDC (for 230V models) 400VDC (for 460V models)

517VDC (for 575V models)

Yes

Maybe AC motor drive has malfunction. Please contact DELTA.

Control circuit has malfunction or misoperation due to noise. Please contact DELTA.

Revision August 2006, SE08, SW V2.61

7-3

VFD007S23A specifications

Delta Electronics VFD007S23A is a highly versatile and efficient variable frequency drive (VFD) designed to control AC motors and enhance energy savings in various industrial applications. Known for its robust performance, this drive provides precise motor control and has become a preferred choice in industries requiring reliable and efficient motor management.

One of the main features of the VFD007S23A is its compact design, which makes it suitable for installations with limited space. With a compact size of only 200mm in height, 150mm in width, and 110mm in depth, it can be easily integrated into existing systems without needing extensive modifications.

The VFD supports a wide range of input voltages, accommodating 200V to 240V three-phase power supply. It is capable of delivering up to 0.75 kW of power, making it suitable for various applications including fans, pumps, and conveyors. Its adjustable frequency output allows for speed control, enhancing process efficiency and reducing energy consumption.

Equipped with advanced control technologies, the VFD007S23A offers both scalar and vector control modes. Scalar control is ideal for applications where precise speed control is not critical, while vector control provides superior torque performance, making it ideal for applications requiring high acceleration and deceleration. This feature allows users to achieve optimal performance regardless of the application requirements.

Incorporating features such as keypad programming, the VFD includes user-friendly interface allowing for easy setup and adjustments. The drive also supports various communication protocols, including Modbus RTU, enabling seamless integration into existing automation systems.

Another significant characteristic is its built-in protection features, including over-voltage, under-voltage, phase loss, and overload protection. These safety features ensure the durability and reliability of the device, extending its lifespan and minimizing downtime.

Additionally, the VFD007S23A is designed with energy efficiency in mind. It features an energy-saving mode that can reduce energy consumption significantly in variable load applications. By adjusting the motor speed according to the actual load demand, users can achieve lower operational costs while contributing to environmental sustainability.

In conclusion, Delta Electronics VFD007S23A stands out as an efficient and reliable choice for variable frequency drive applications. Its robust design, advanced control technologies, and energy-saving features make it ideal for a wide range of industrial applications, ensuring optimal performance and operational efficiency.

Delta Electronics VFD007S23A manual Low Voltage Lv

Models: VFD007S23A

7.4 Low Voltage (Lv)

VFD007S23A specifications