1. Introduction
The SUSWE SU900 series Variable Frequency Drive (VFD) is a high-power motor speed controller and frequency converter designed for various industrial applications. This manual provides essential information for the safe and efficient installation, operation, and maintenance of your SU900 VFD.
The SU900 VFD supports vector control and offers multiple protection functions, ensuring device protection, energy saving, high efficiency, and stability. It is suitable for a wide range of motors and applications, including woodworking machinery, food machinery, textile machinery, plastic machinery, CNC machine printing machinery, and general automation requiring precise motor control.
2. Safety Information
Before installation, operation, or maintenance, carefully read and understand all instructions in this manual. Failure to follow safety precautions may result in serious injury or equipment damage.
- Ensure the VFD is installed by qualified personnel only.
- Always disconnect power before performing any wiring or maintenance.
- Verify correct voltage and phase connections as per the wiring diagrams.
- Do not touch internal components when power is applied or shortly after power-off, as residual voltage may be present.
- Ensure proper grounding of the VFD and connected motor.
- Operate the VFD within its specified environmental conditions (temperature, humidity).
3. Specifications
The SUSWE SU900 series VFD is available in various power ratings. Key specifications are detailed below. For specific model parameters, refer to the tables and diagrams provided.
General Product Information
| Parameter | Value |
|---|---|
| Name | General purpose inverter |
| Power Specifications | 0.75 - 45KW |
| Input Voltage | 220V / 380V |
| Rated Current | 1.5 - 320A (varies by model) |
| Input Frequency | 50/60HZ |
| Protection Level | IP20 |
| Temperature Range | -20 ~ +60°C |
| Cooling Mode | Self-cooling fan |
| Product Protection | 6 great protections |
Model-Specific Parameters (SU900-30R0G3, 37R0G3, 45R0G3)
| Parameter | SU900-30R0G3 | SU900-37R0G3 | SU900-45R0G3 |
|---|---|---|---|
| Rated Current | 60A | 76A | 91A |
| Adapted Motor | 30KW 40Hp | 37KW 50Hp | 45KW 60Hp |
| Input Voltage | Three phase 380V | ||
| Output Voltage | Three phase 380V | ||
| External Dimensions (mm) | 360 x 225 x 231.7 | ||
| Gross Weight | 10Kg | ||
External Unit Dimensions
The SU900 series VFDs come in various external unit sizes (C1 to C5) depending on the model and power supply. Refer to the diagrams below for general dimensions. Always consult the specific product manual for exact dimensions of your model.
4. Installation
Proper installation is crucial for the safe and reliable operation of the VFD. Pay attention to safety matters to prevent dangerous occurrences and improper operation.
Wiring Instructions
The wiring is designed to be simple and convenient. Ensure all connections are secure and follow local electrical codes.
| Terminal Marks | Name | Instruction |
|---|---|---|
| R, S, T / L, N | Power supply input terminals | Connect three-phase 380V or single-phase 220Vac power supply |
| P+, PB | Brake electric resistance connection terminals | Connect brake electric resistance |
| U, V, W | Frequency converter output terminals | Connect three-phase motor |
| Grounding terminals | Grounding terminals |
Simplified Wiring Diagrams
Below are simplified wiring diagrams for 220V and 380V systems. Always ensure the ground wire is properly connected.
Detailed Control Circuit Wiring (3-Phase 380V Example)
The control circuit wiring for all 800/900 series inverters is similar. The following diagram illustrates the three-phase 380V converter wiring, indicating both main loop and control loop terminals. For detailed control circuit configurations, refer to the comprehensive product manual.
5. Operation
The SU900 VFD features a user-friendly control panel for easy operation and monitoring.
Control Panel Overview
The man-machine interactive key panel allows simultaneous monitoring of two groups of operating data, including speed, frequency, current, and voltage. An external extension network cable can be used to adjust working conditions more flexibly.
Basic Operation
- Power On: Ensure all wiring is correct and secure before applying power.
- Parameter Setting: Use the Programming Key and Increment/Decrement Keys to navigate menus and adjust parameters. The Confirm Key (ENTER) saves settings.
- Speed Control: Adjust the Speed Control Knob to set the desired output frequency/motor speed.
- Run/Stop: Press the Run Key to start the motor and the Stop/Reset Key to stop it.
- Monitoring: The Display Area shows real-time operating data such as frequency and current.
6. Maintenance
Regular maintenance helps ensure the longevity and optimal performance of your VFD.
Internal Components and Construction
The inverter features well-known brand components and a robust internal structure for stability and durability.
Welding Process
The circuit board utilizes an industrial SMT welding process, ensuring smooth and reliable solder paste application for high reliability and gloss of welding.
Anti-EMC Power Supply
The VFD incorporates an industrial anti-EMC power supply with a low-loss high-frequency transformer, overload protection, and a wide voltage input function. It features an independent bridge wall power supply scheme with self-check for abnormal power supply functions.
Three Anti-Paint Process
The VFD's circuit boards undergo a fully automatic double-sided coating process using imported polyurethane cool treatment. This enhances the stability of the inverter in harsh environments.
Efficient Heat Dissipation
The VFD is equipped with DC fans and an aluminum alloy radiator for quick and efficient heat dissipation. Intelligent start and stop functions ensure optimal cooling speed.
7. Troubleshooting
This section provides general guidance for common issues. For detailed error codes and specific troubleshooting steps, please refer to the comprehensive product manual or contact technical support.
- No Power/Display: Check input power connections, fuses, and ensure the VFD is correctly wired to the power supply.
- Motor Not Running: Verify motor connections (U, V, W), check VFD parameters for correct motor type and control mode, and ensure the Run command is active.
- Overcurrent/Overvoltage Fault: Check motor load, acceleration/deceleration times, and input voltage stability. Ensure braking resistance is correctly installed if used.
- Overheat Fault: Ensure adequate ventilation around the VFD. Check if cooling fans are operating correctly and are free from obstructions.
- Communication Error (RS485): Verify RS485 wiring, communication parameters (baud rate, parity), and ensure the external device is functioning correctly.
8. User Tips
Based on common user inquiries, here are some helpful tips for using your SU900 VFD:
- Phase Conversion Capability: The SU900 VFD is versatile and can handle various phase conversions. It supports:
- Single-phase 220V input to three-phase 380V output.
- Single-phase 220V input to three-phase 220V output.
- Three-phase 380V input to three-phase 380V output.
- Parameter Customization: Take advantage of the programming keys to fine-tune parameters for your specific application. This can optimize motor performance, energy efficiency, and protection.
- External Control: Utilize the detachable smart panel and RS485 communication for remote control and integration into automation systems, offering greater flexibility in operation.
9. Warranty and Support
The SUSWE SU900 Variable Frequency Drive comes with a 1-year warranty from the date of purchase, covering manufacturing defects and malfunctions under normal operating conditions. Please retain your proof of purchase for warranty claims.
For technical support, troubleshooting assistance beyond this manual, or warranty inquiries, please contact your vendor or the manufacturer's customer service. Provide your product model number (SU900) and a detailed description of the issue for efficient support.