1. Introduction
This manual provides essential information for the safe and effective operation of your HLTNC Hybrid AC Servo Driver. The A1-SVD and AASD series drivers are designed for precise control of various AC servo motors in industrial automation applications. Please read this manual thoroughly before installation and operation.
Key Features and Advantages
- Stable Performance & Fast Response: Engineered for high reliability and quick operational feedback.
- Advanced Heat Dissipation: Incorporates an advanced design for efficient cooling, ensuring longevity (15A drivers typically do not include a cooling fan).
- Broad Power Matching: Compatible with common servo motor powers including 400W, 600W, 750W, 1KW, 1.2KW, 2.6KW, and 3.5KW.
- Wide Motor Compatibility: Supports various machine bases such as 60ST, 80ST, 90ST, 110ST, 130ST, and Nema 24, 42, 52 standard mounting flanges.
- Strong Current Output: Available in multiple current specifications (15A, 20A, 30A, 50A) to ensure stable and sufficient power delivery.
- Hybrid Control Algorithms: Utilizes advanced hybrid control for high precision, rapid response, and enhanced stability in demanding industrial environments.
2. Setup and Installation
Proper installation is crucial for the optimal performance and safety of the servo driver. Ensure all connections are secure and follow the wiring diagram carefully.
2.1. Driver Dimensions
Refer to the diagram below for the physical dimensions of the servo driver.

Figure 2.1: Servo Driver Dimensions (Length: 190mm, Width: 160mm, Height: 50mm)
2.2. Interface Overview
The servo driver features several interfaces for communication, signal input, and power supply. Familiarize yourself with these connection points:

Figure 2.2: Servo Driver Interface Layout
- Communication Interface: For data exchange with external systems.
- PC Signal Input: Connects to the host computer for pulse signals.
- Encoder Signal Input: Receives feedback from the motor's encoder.
- Control Circuit Power Supply: Provides power to the driver's control logic.
- Main Circuit Power Supply: Supplies power to the motor drive section.
- External Braking Resistor Interface: For connecting an optional external braking resistor.
- Motor Power Line: Connects to the servo motor's power input.
- Ground Terminal: For proper grounding of the unit.
2.3. Wiring Diagram
Follow this diagram for connecting the servo driver to your system components, including the servo motor, host computer, and power supply.

Figure 2.3: General Wiring Diagram
- Power Supply: Connect 220V AC (three-phase or simplex as indicated on the driver).
- Motor Connection: Connect the servo motor power lines and coding line to the designated terminals.
- Control Signals: Connect the host computer pulse line to the PC signal input.
- Braking Resistor: If required, connect an additional braking resistor to its interface.
3. Operating Instructions
The servo driver features a 5-digit LED display and control buttons for configuration and monitoring.
3.1. Control Panel Functions
The control panel allows you to navigate menus, adjust parameters, and confirm settings.

Figure 3.1: Control Panel and Button Functions
| Button | Button Name | Features |
|---|---|---|
| MODE | Mode Selection Key | 1. Mode Switching 2. Return to the Upper-Level Directory |
![]() | Number Increase Key | Increase the number; long press has a repeating effect. |
![]() | Decrease Key | Decrease the number; long press has a repeating effect. |
| Shift | Shift Key | Cursor Shift |
| SET | OK Key | 1. Confirm the settings 2. End parameter setting |
Note: If all 5 decimal points of the display screen are flashing, it indicates an alarm is generated. The alarm must be cleared before the driver can work normally.
4. Specifications
The HLTNC Hybrid AC Servo Drivers are available in various models with different current and power ratings.
| Model | Current (A) | Voltage (V) | Application For Servo Motor (KW) |
|---|---|---|---|
| AASD-15A | 15A | 220V | 0.4-0.75KW |
| AASD-20A | 20A | 220V | 1KW |
| AASD-30A | 30A | 220V | 1.2-2.6KW |
| AASD-50A | 50A | 220V | 3.5KW |
| A1-SVD15 | 15A | 220V | 0.4-0.75KW |
| A1-SVD20 | 20A | 220V | 1KW |
| A1-SVD30 | 30A | 220V | 1.2-2.6KW |
Note: AASD series generally offers better performance and stability compared to A1-SVD series.
General Product Properties
- Power Supply: AC
- Motor Type: AC Motor
- Input Voltage: 220V AC
- Certification: CE
- Origin: Mainland China
5. Maintenance
Regular maintenance helps ensure the longevity and reliable operation of your servo driver.
- Keep Clean: Regularly clean the exterior of the driver to prevent dust and debris buildup, especially around ventilation openings.
- Check Connections: Periodically inspect all wiring connections for tightness and signs of wear or corrosion.
- Ensure Ventilation: Verify that the cooling fan (if present) is operating correctly and that there is adequate airflow around the unit to prevent overheating.
- Environmental Conditions: Operate the driver within specified environmental conditions (temperature, humidity) to avoid damage.
6. Troubleshooting
This section provides guidance on common issues you might encounter.
Alarm Indication
- Symptom: All 5 decimal points on the LED display are flashing.
- Cause: This indicates an alarm condition.
- Action: The alarm must be cleared before the driver can resume normal operation. Refer to the detailed English Manual (link provided in the Introduction section) for specific alarm codes and their corresponding troubleshooting steps.
General Troubleshooting Tips
- No Power: Check the main circuit and control circuit power supply connections and ensure the correct voltage (220V AC) is applied.
- Motor Not Responding: Verify motor power line and encoder signal input connections. Check PC signal input for correct pulse signals.
- Overheating: Ensure proper ventilation and that the cooling fan (if applicable) is functioning. Reduce load if necessary.
7. User Tips
Here are some helpful tips based on common user inquiries:
- Motor Compatibility: When selecting a driver, always match the driver's power rating (KW) and current (A) to your servo motor's specifications. For example, if you have a 3.8KW servo motor, the AASD-50A (rated for 3.5KW) might be close to its limit. It is generally recommended to choose a driver with a slightly higher capacity than your motor's continuous power rating for optimal performance and longevity.
- Documentation: For detailed parameter settings and advanced configurations, always refer to the comprehensive English Manual available via the provided download link.
8. Warranty and Support
HLTNC is committed to providing excellent customer service.
- Technical Support: The manufacturer offers comprehensive pre-sales and after-sales technical support.
- Contact: For any technical assistance or inquiries, please contact HLTNC Official Store support channels.
About the Manufacturer
Lishui Hengli Automation Technology Co., Ltd. has been engaged in the CNC industry for 13 years, with mature experience in product production, processing, and sales. They offer a range of products including ball screws, linear guide rails, stepper motors, drives, servo motors, CNC spindles, and gear racks.
Video: Overview of HLTNC's manufacturing capabilities and product range.







