1. Introduction
Thank you for choosing the Sihao Automatic Gate Opener. This manual provides essential information for the safe and efficient installation, operation, and maintenance of your electric sliding gate opener. Designed for heavy-duty sliding gates, this system offers convenience and security for various applications, including residential, commercial, and agricultural properties. Please read this manual thoroughly before installation and operation to ensure proper use and to prevent damage or injury.
2. Safety Information
WARNING: Failure to follow these safety instructions could result in serious injury or death.
- Always disconnect power before performing any service or maintenance.
- Keep hands, feet, and clothing clear of the gate and opener at all times.
- Do not allow children to play with or operate the gate opener or its remote controls.
- Ensure the gate area is clear of people and obstacles before operating.
- An infrared sensor (not included) is required for obstacle detection to prevent injury or damage.
- Professional installation is recommended for electrical connections and mechanical setup.
- Ensure all wiring complies with local electrical codes.
- Never attempt to repair the motor or control board yourself. Contact qualified personnel.
3. Package Contents
Please check the package contents against the list below. If any items are missing or damaged, contact your supplier immediately.

- 1 x Main Motor Unit (800kg or 1600kg variant)
- 2 x Remote Controls
- 2 x Manual Release Keys
- 1 x Backplane (Mounting Plate)
- 2 x Magnet Stands
- 4 x Expansion Screws
- 2 x Pressure Plates
- 2 x Magnets (for limit switches)
- 8 x Gear Racks (0.5 meters each)
- 1 x Installation Manual
4. Specifications
The Sihao Automatic Gate Opener is available in different configurations. Please refer to your specific model for exact details.
| Feature | Specification |
|---|---|
| Voltage | AC220V or AC110V (model dependent) |
| Motor Power | 370W / 750W (model dependent) |
| Maximum Gate Weight | 800kg / 1600kg (model dependent) |
| Maximum Noise | 55dB |
| Maximum Remotes Supported | 25 |
| Ambient Temperature | -25℃ to +70℃ |
| Remote Control Range | Up to 30 meters |
| Maximum Gate Length | 13 meters/minute |
| Material | Aluminum alloy |


5. Installation and Setup
Before starting installation, ensure the gate is structurally sound, moves freely, and is properly aligned. Clear the area around the gate of any debris or obstructions.
5.1. Pre-installation Check
- Verify the gate's weight and length are within the opener's specifications (800kg or 1600kg, up to 13m/min).
- Ensure there is adequate space for the opener unit and gear racks.
- Confirm the availability of the correct power supply (AC220V or AC110V) at the installation site.
5.2. Mounting the Opener Unit
- Prepare a stable, level concrete base for the opener unit. The base should be strong enough to support the unit and withstand gate forces.
- Position the backplane (mounting plate) on the concrete base, ensuring it is level and correctly aligned with the gate's path.
- Mark the drilling points for the expansion screws through the backplane.
- Drill holes into the concrete base and secure the backplane using the provided expansion screws.
- Mount the main motor unit onto the secured backplane.
5.3. Installing Gear Racks
- Attach the gear racks along the bottom edge of the sliding gate, ensuring they are level and parallel to the ground.
- Maintain a small clearance (approximately 1-2mm) between the gear rack and the opener's drive gear to allow for smooth operation and thermal expansion.
- Use all 8 gear racks (0.5 meters each) to cover the full length of your gate's travel.
5.4. Electrical Wiring
CAUTION: Electrical wiring should only be performed by a qualified electrician. Ensure power is OFF before making any connections.

- Connect the main power supply (AC220V or AC110V, depending on your model) to the designated terminals on the control board. Refer to the circuit board diagram for specific connections (L, N, G).
- Connect the motor wires to the motor terminals on the control board.
- If using an external infrared sensor (recommended for safety, not included), connect it to the appropriate safety input terminals on the control board.
- Ensure all connections are secure and insulated.
5.5. Limit Switch Adjustment
The magnetic limit switches define the open and closed positions of your gate.
- Attach the two magnets to the gate, one for the fully open position and one for the fully closed position.
- Position the magnets so that they trigger the internal sensors on the opener unit at the desired open and closed points.
- Test the gate's travel to ensure it stops precisely at the intended limits without overrunning.
6. Operating Instructions
Your Sihao Automatic Gate Opener is designed for easy operation using the provided remote controls.

6.1. Remote Control Functions
The remote controls feature three primary buttons:
- Open Button: Press to open the gate.
- Close Button: Press to close the gate.
- Pause Button: Press to stop the gate at any point during its travel. Pressing Open or Close again will resume operation in the respective direction.
The remote control has a range of up to 30 meters and can connect up to 25 remotes to a single opener unit.
6.2. Manual Release
In case of a power failure or emergency, you can manually operate the gate:
- Insert the manual release key into the keyhole on the opener unit.
- Turn the key to disengage the motor.
- You can now manually push the gate open or closed.
- To re-engage the motor, turn the key back to its original position and remove it.
6.3. Self-Closing Setting
The opener supports a self-closing feature with adjustable delays (5s, 10s, 15s). This is not a default setting and needs to be configured on the control board. Refer to the detailed instructions in the full installation manual for programming this feature.
6.4. Obstacle Detection
If an infrared sensor is installed, the gate will automatically stop if an obstacle is detected in its path during closing. This feature enhances safety and prevents damage. The infrared sensor is not included in the standard kit and must be purchased separately.
6.5. Product Demonstration Video
7. Maintenance
Regular maintenance ensures the longevity and reliable operation of your gate opener.
- Monthly:
- Clean the gear racks and the opener's drive gear to remove dirt, leaves, or debris.
- Inspect the gate's movement for any stiffness or friction. Lubricate hinges and rollers if necessary.
- Check all electrical connections for tightness and signs of wear.
- Quarterly:
- Test the obstacle detection system (if an infrared sensor is installed) by placing an object in the gate's path during closing. The gate should stop.
- Inspect the mounting hardware for any looseness and tighten if required.
- Check the remote control batteries and replace if needed.
- Annually:
- Have a qualified technician inspect the entire system, including the motor, control board, and safety features.
8. Troubleshooting
Here are some common issues and their potential solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Gate does not move | No power; Remote battery dead; Manual release engaged; Obstacle detected; Motor fault. | Check power supply; Replace remote battery; Disengage manual release; Clear obstacles; Consult technician. |
| Remote control not working | Dead battery; Out of range; Remote not programmed. | Replace battery; Move closer to opener; Reprogram remote (refer to full manual). |
| Gate stops unexpectedly | Obstacle detected by sensor; Limit switch issue; Overheating motor. | Clear path; Check/adjust limit switches; Allow motor to cool down. |
| Gate opens/closes partially | Limit switches incorrectly set; Obstruction. | Adjust limit switches; Remove obstruction. |
| Unusual noise from motor | Lack of lubrication; Worn gears; Loose components. | Lubricate moving parts; Inspect gears and tighten components; Consult technician. |
9. User Tips
- Regular Cleaning: Keep the gear racks and the motor's drive gear free from dirt, leaves, and small stones to ensure smooth operation and prevent wear.
- Test Safety Features: Periodically test your obstacle detection sensors (if installed) to ensure they are functioning correctly.
- Remote Control Care: Keep your remote controls in a safe, dry place and replace batteries promptly when they start to weaken.
- Manual Override Practice: Familiarize yourself with the manual release mechanism in case of power outages.
10. Warranty and Support
Sihao products are manufactured to high-quality standards. For warranty information, technical support, or service inquiries, please contact your original point of purchase or the Sihao customer service department. Keep your purchase receipt as proof of purchase.