1. Introduction
This manual provides essential information for the safe and efficient operation, installation, and maintenance of the Linecome LNC820 Series Variable Frequency Drive (VFD). The LNC820 is a general-purpose frequency converter designed for precise control of motors and compressors in various industrial applications.
It features a powerful and stable performance, utilizing a special DSP chip to enhance motor efficiency, reduce energy losses, and optimize curve settings. The unit is equipped with 485 communication capabilities and an integrated braking unit, offering a wide power range to suit diverse operational needs.
2. Specifications
2.1 General Specifications
| Attribute | Value |
|---|---|
| Brand Name | Linecome |
| Type | Hand Tool Parts (General-purpose Frequency Converter) |
| Material | PC+ABS |
| Color | White grey |
| Rated Power | 2.2kW |
| Nominal Voltage | 220V |
| Power Phase Number | Three Phase |
| Output Frequency | 0-500Hz |
| IP Level | IP20 |
| Installation Size | 90*157mm |
| Weight | 2.4kg |
| Display | LED Display |
2.2 Model Specific Data (LNC820-2T0022GB/2T0040PB)
| Model | Input/Output Voltage (V) | Rated Power (kW) | Rated Input Current (A) | Rated Output Current (A) |
|---|---|---|---|---|
| LNC820-2T0022GB/2T0040PB | Three Phase 220V±15% / Three Phase 220V±15% | 2.2 | 10.5 | 9 |
3. Main Components
The LNC820 VFD is constructed with high-quality components to ensure stable performance and longevity. Key internal and external components include:
- Fan: Provides efficient cooling, dust-proof design, and noise reduction for optimal thermal management.
- PCB Board: Features special protective paint for acid and alkali resistance, and enhanced aging resistance, contributing to the unit's durability.
- Control Board: Designed for low frequency, high torque applications, and automatic voltage regulation, ensuring precise motor control.
- Keypad: A simplified design with an LED digital display for easy operation and monitoring.
4. Installation and Wiring
4.1 Environmental Considerations
Ensure the installation environment is clean, dry, and well-ventilated. Avoid direct sunlight, excessive dust, corrosive gases, and high humidity. Maintain adequate clearance around the VFD for proper airflow and heat dissipation.
4.2 Mounting
The VFD should be mounted vertically on a stable surface using appropriate fasteners. Refer to the dimensions provided in Figure 3 for mounting hole locations and overall size. Ensure the mounting surface can support the unit's weight (2.4kg).
4.3 Wiring Instructions
All wiring should be performed by qualified personnel in accordance with local electrical codes and regulations. Ensure power is disconnected before making any connections.
- Input Terminals (Power Supply): Connect the three-phase power supply to the R, S, and T terminals of the frequency converter.
- Output Terminals (Motor Connection): Connect the three-phase asynchronous motor to the U, V, and W output terminals of the frequency converter.
- Brake Unit Connection: If a brake unit is used, connect it to the P+ and PB terminals.
- Grounding: Ensure the VFD is properly grounded to prevent electrical shock and ensure stable operation.
For detailed wiring diagrams and control circuit connections, please refer to the comprehensive manual provided with the product or consult a qualified electrician.
5. Operating Instructions
The LNC820 VFD features an intuitive keypad and LED display for easy parameter setting and operation. The display shows operational status and frequency, while the buttons allow for control and configuration.
5.1 Basic Operation
- Power On: After ensuring all connections are secure, apply power to the VFD. The LED display will illuminate.
- Start/Stop: Use the dedicated RUN and STOP buttons on the keypad to start and stop the motor.
- Frequency Adjustment: The rotary knob or arrow buttons on the keypad can be used to adjust the output frequency, thereby controlling the motor speed.
- Parameter Setting: Access the parameter menu using the "M-FUNC" or "PRG" button. Use the arrow keys and "ENTER" button to navigate and modify parameters.
Refer to the detailed programming guide in the full product manual for advanced parameter settings and specific control modes (e.g., vector control, PLC functions).
6. Maintenance
Regular maintenance ensures the longevity and reliable operation of your Linecome LNC820 VFD.
- Cleaning: Keep the VFD clean and free from dust and debris. Use a soft, dry cloth for external cleaning. Do not use liquid cleaners.
- Ventilation: Ensure that the cooling fan and ventilation openings are not obstructed. Periodically check the fan for proper operation and clean any accumulated dust.
- Connections: Periodically inspect all electrical connections for tightness and signs of corrosion. Loose connections can lead to overheating and malfunction.
- Environmental Check: Verify that the operating environment remains within specified temperature and humidity ranges to prevent damage to internal components, especially the PCB board which is designed with protective coatings.
For any internal maintenance or repairs, contact qualified service personnel.
7. Troubleshooting
This section provides general guidance for common issues. For complex problems, refer to the full product manual or contact technical support.
7.1 Common Issues and Solutions
- VFD does not power on:
- Check the main power supply connection.
- Verify input voltage matches specifications.
- Inspect fuses or circuit breakers.
- Motor does not start:
- Ensure the RUN command is active.
- Check motor wiring (U, V, W terminals).
- Verify all safety interlocks are disengaged.
- Check for any fault codes on the LED display.
- Motor runs erratically or at incorrect speed:
- Check frequency setting on the keypad.
- Verify motor parameters are correctly set in the VFD.
- Inspect motor for mechanical issues.
- Overcurrent/Overvoltage fault:
- Check motor load.
- Verify input voltage stability.
- Ensure proper braking unit connection if applicable.
The LNC820 series is designed with fault traceability features. If a fault occurs, note the error code displayed and consult the detailed manual for specific diagnostic steps.
8. User Tips
- Customization: Linecome offers product customization to meet specific requirements. If your application has unique needs, inquire about tailored solutions.
- Quality Assurance: The manufacturing process is ISO9001-certified, with rigorous IQC, IPQC, OQC, and FQC inspections. Each product has a unique code for traceability, ensuring high quality and reliability.
- Technical Support: Leverage the professional technical and after-sales teams for any queries or assistance with installation, operation, or advanced configurations.
9. Warranty and Support
9.1 Warranty Information
The Linecome LNC820 Series Variable Frequency Drive comes with an 18-month warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims.
9.2 Technical Support
For technical assistance, troubleshooting, or service inquiries, please contact Linecome customer support. Provide your product model and serial number for efficient service.
Contact details can typically be found on the manufacturer's official website or in the full product documentation.
10. Typical Applications
The Linecome LNC820 VFD is versatile and suitable for a wide range of industrial applications, including but not limited to:
