1. Introduction
The FBT VS500 Series Inverter is a dedicated frequency inverter designed for engraving machines and other industrial applications requiring precise motor control. Known for its superior cost-efficiency, the VS500 series is widely applied in machine tools, electricity, textile, transportation, transmission, paper, cable, and metallurgy industries. This manual provides essential information for the safe and effective installation, operation, and maintenance of your VS500 inverter.
Important Safety Warnings:
- Refer to the instruction manual before installation and operation.
- Do not connect AC power to output terminals U, V, W.
- Do not connect AC power while applying power and at least 10 minutes after disconnecting power.
- Securely ground the equipment.
2. Product Features
The VS500 series inverter incorporates advanced technology to deliver reliable and efficient performance. Key features include:
- Compact Design: Features a compact yet reasonable structure, reducing the inverter's volume by 20%-30% compared to traditional general inverters. It includes an independent cooling duct and a closed main loop design for enhanced durability.
- Advanced Cooling: Utilizes a DC fan characterized by large volume, high wind pressure, excellent cooling effect, and stable performance, ensuring optimal operating temperatures.
- Droop Control Function: Automatically balances the power of drive systems for inverters on the same transmission chain, improving system stability and efficiency.
- Self-Adaptive Control Technology: Allows for automatic current and voltage limitation, as well as under-voltage suppression during operation, protecting the equipment and ensuring stable performance.
- Communication Interface: Equipped with a standard RS485 communication interface and supports optional MODBUS protocol and SUNFAR self-defined protocol. This enables linkage synchronous control, facilitating easy communication with PLCs, industrial personal computers, and other industrial equipment.
- Load Auto-Balancing: When RS485 communication linkage control is adopted, the master motor synchronously sends frequency and torque load commands to each slave motor, achieving precise torque balancing across the variable frequency drive system.
3. Setup and Installation
3.1. Unpacking and Inspection
Upon receiving your VS500 inverter, carefully unpack it and inspect for any signs of damage during transit. Verify that all components listed in the packing list are present. If any damage or missing parts are found, contact your supplier immediately.
3.2. Mounting
Mount the inverter vertically on a flat, non-flammable surface in a well-ventilated area. Ensure sufficient clearance around the unit for proper airflow and heat dissipation. Avoid mounting in direct sunlight, high humidity, or dusty environments.
3.3. Wiring
All wiring must be performed by qualified personnel in accordance with local and national electrical codes. Ensure power is disconnected before making any connections.
- Power Input (R, S, T): Connect the 380V AC power supply to the R, S, T terminals.
- Motor Output (U, V, W): Connect the motor leads to the U, V, W terminals. Ensure correct phase sequence for desired motor rotation.
- Grounding: Connect the ground terminal (PE) to a reliable earth ground. This is crucial for safety and proper operation.
- Control Terminals: Connect external control signals (e.g., start/stop, speed reference, emergency stop) to the designated control terminals as per your application requirements. Refer to the detailed wiring diagram in the full product manual for specific terminal assignments.
Note: Incorrect wiring can lead to equipment damage or personal injury. Always double-check all connections before applying power.

This image displays two models of the FBT VS500 Series engraving machine inverters. The larger unit is on the left, and a slightly smaller unit is on the right. Both inverters are dark gray with a prominent red LED digital display showing numerical values, likely frequency and output. Below the display, there is a control panel with various buttons for functions like ESC, SET, REV, FWD, STOP, and a rotary knob for parameter adjustment. A yellow warning label is visible on the lower front of both units, indicating important safety instructions.
4. Operating Instructions
4.1. Control Panel Overview
The VS500 inverter features an intuitive control panel for easy operation and parameter setting. The panel typically includes:
- Digital Display: Shows operating frequency, output current, voltage, and various parameter values.
- ESC Button: Used to exit menus or cancel operations.
- SET Button: Used to enter parameter setting mode or confirm selections.
- REV/FWD Buttons: Used for changing motor rotation direction (Reverse/Forward).
- STOP Button: Used to stop the motor.
- Rotary Knob: Used for adjusting frequency, navigating menus, and changing parameter values.
4.2. Basic Operation
- Power On: After ensuring all connections are secure, apply power to the inverter. The digital display will illuminate.
- Start Motor: Press the FWD button to start the motor in the forward direction, or REV for reverse.
- Adjust Frequency/Speed: Rotate the knob to increase or decrease the output frequency, thereby adjusting the motor speed.
- Stop Motor: Press the STOP button to bring the motor to a halt.
- Parameter Setting: Press the SET button to enter the parameter setting menu. Use the knob to navigate and adjust parameters. Press SET again to confirm changes and ESC to exit.
Note: For detailed parameter settings and advanced functions, refer to the comprehensive programming guide in the full product manual.
5. Maintenance
Regular maintenance ensures the longevity and optimal performance of your VS500 inverter.
- Cleaning: Periodically clean the inverter's exterior and cooling fins to prevent dust accumulation, which can hinder heat dissipation. Use a soft, dry cloth. Do not use liquid cleaners.
- Fan Inspection: Check the cooling fan for proper operation and ensure it is free from obstructions. Replace the fan if it becomes noisy or stops working.
- Terminal Tightness: Annually check all electrical connections for tightness. Loose connections can cause overheating and intermittent operation.
- Environmental Conditions: Ensure the operating environment remains within specified temperature and humidity ranges. Avoid exposure to corrosive gases or excessive vibration.
- Capacitor Life: Electrolytic capacitors have a finite lifespan. Consider professional inspection and replacement after several years of continuous operation, especially in high-temperature environments.
6. Troubleshooting
This section provides solutions to common issues you might encounter with your VS500 inverter. For more complex problems, consult the full product manual or contact technical support.
| Problem | Possible Cause | Solution |
|---|---|---|
| No display/No power | No input power; Blown fuse; Loose wiring. | Check power supply; Inspect and replace fuse; Verify all power connections. |
| Motor does not run | Incorrect wiring; Motor parameters not set; Emergency stop active; Overload. | Check motor wiring; Set motor parameters (P00.01, etc.); Release emergency stop; Check motor load. |
| Overcurrent fault (OC) | Motor overload; Short circuit in motor/cables; Acceleration time too short. | Reduce load; Check motor and cables; Increase acceleration time (P00.02). |
| Overvoltage fault (OV) | Input voltage too high; Deceleration time too short; Regenerative load. | Check input voltage; Increase deceleration time (P00.03); Consider braking resistor for regenerative loads. |
| Undervoltage fault (UV) | Input voltage too low; Power supply instability. | Check input voltage; Ensure stable power supply. |
| Overheat fault (OH) | Ambient temperature too high; Cooling fan failure; Blocked ventilation. | Improve ventilation; Check/replace cooling fan; Clear obstructions. |
7. Technical Specifications
Below are the general specifications for the FBT VS500 Series Inverter, model VS500-4T0022G/4T0037P:
- Brand: FBT
- Model: VS500-4T0022G/4T0037P
- Input Voltage: 380 Volts AC
- Output Voltage: 380 Volts AC
- Power: 2.2 KW
- Part Number: VS500-4T0022G/4T0037P
- ASIN: B08QW3ZGDZ
- First Available: December 17, 2020
8. Warranty and Support
FBT products are manufactured to high-quality standards. For specific warranty terms and conditions, please refer to the warranty card included with your product or contact FBT customer support directly. In case of technical issues or inquiries not covered in this manual, please reach out to your authorized FBT dealer or the manufacturer's customer service for assistance.
For further information or support, please visit the FBT Store on Amazon.





