HJA1S
Richmat HJA1S Dual Actuator Instruction Manual
For Hospital Beds and Adjustable Bed Bases
1. Introduction
This manual provides essential information for the safe and effective installation, operation, and maintenance of the Richmat HJA1S Dual Actuator. This actuator is designed as a replacement component for various adjustable bed bases and hospital beds, facilitating the independent movement of head and foot sections. Please read this manual thoroughly before attempting any installation or maintenance.
2. Safety Information
- Always disconnect the power supply to the bed frame before attempting any installation, removal, or maintenance of the actuator.
- Ensure all cables are properly routed and secured to prevent pinching or damage.
- Keep hands, feet, and loose clothing clear of moving parts during operation.
- This actuator is an electrical component. Do not expose it to water or excessive moisture.
- Installation should ideally be performed by a qualified technician or an individual with experience in bed frame assembly and electrical components.
- Do not attempt to open or repair the actuator. There are no user-serviceable parts inside. Unauthorized opening will void the warranty.
3. Product Overview
The Richmat HJA1S is a dual-motor linear actuator system integrated into a single housing, designed to provide synchronized or independent movement for two distinct sections of an adjustable bed, typically the head and foot sections. It features robust construction and a built-in power supply connection.

Figure 3.1: Top-down view of the Richmat HJA1S Dual Actuator, showing its compact design and integrated motors.

Figure 3.2: Rear view of the actuator, displaying the power cord connection and motor housings.

Figure 3.3: Front view of the actuator, showing the overall length and the power cord extending from the unit.
4. Setup and Installation
This actuator is designed as a direct replacement for existing Richmat HJA1S units or compatible dual actuators. Verify compatibility before proceeding.
4.1 Pre-Installation Checklist
- Ensure the bed is unplugged from the wall outlet.
- Identify the existing actuator and its mounting points.
- Gather necessary tools (e.g., screwdriver, wrench, if required by your bed frame).
4.2 Removal of Old Actuator
- Carefully disconnect all electrical connections from the old actuator (power cord, control cables). Note their positions for re-connection.
- Unbolt or unclip the old actuator from the bed frame's mounting brackets. Support the bed sections if necessary to prevent collapse.
- Remove the old actuator from the bed frame.
4.3 Installation of New Actuator
- Position the new Richmat HJA1S actuator into the designated mounting location on the bed frame.
- Securely fasten the actuator to the bed frame using the appropriate bolts or clips. Ensure it is stable and does not wobble.
- Reconnect all electrical cables (power cord, control cables) to the new actuator. Ensure connections are firm and correct according to your bed frame's wiring diagram.
- Route cables neatly and secure them with cable ties if provided, to prevent entanglement or damage during bed operation.
4.4 Post-Installation Test
- Plug the bed's power cord back into a wall outlet.
- Using the bed's remote control, test the head and foot sections independently and together to ensure smooth and full range of motion.
- Listen for any unusual noises or signs of strain. If issues arise, refer to the Troubleshooting section.
5. Operation
The Richmat HJA1S Dual Actuator operates in conjunction with your adjustable bed's control system (typically a remote control). Once installed, the actuator will respond to commands from the remote to raise or lower the head and foot sections of the bed.
- Refer to your specific adjustable bed frame's user manual for detailed instructions on operating the remote control and its various functions.
- Avoid exceeding the maximum load capacity of the bed frame and actuator (refer to specifications).
- Do not operate the bed if there are obstructions under or around the moving parts.
6. Maintenance
The Richmat HJA1S Dual Actuator is designed for minimal maintenance. Following these guidelines will help ensure its longevity:
- Cleaning: Wipe the exterior of the actuator with a dry or slightly damp cloth. Do not use harsh chemicals or abrasive cleaners. Ensure no liquid enters the housing.
- Connections: Periodically check all electrical connections to ensure they are secure and free from damage.
- Moving Parts: Ensure the moving parts of the actuator and bed frame are free from obstructions. Do not lubricate the actuator's internal components.
- Duty Cycle: Adhere to the specified duty cycle (Max. 2min ON / 18min OFF) to prevent overheating and premature wear. Continuous operation beyond this limit can damage the unit.
7. Troubleshooting
If you encounter issues with your Richmat HJA1S Dual Actuator, consult the following table before seeking professional assistance.
| Problem | Possible Cause | Solution |
|---|---|---|
| Bed does not move. | No power to the bed. Loose electrical connection. Remote control issue. | Check if the bed is plugged into a working outlet. Verify all cables are securely connected to the actuator and control box. Check remote batteries or try re-pairing if applicable (refer to bed manual). |
| Only one section moves (head or foot). | Specific motor or connection issue. Control box malfunction. | Check the connection for the non-moving section at the actuator and control box. If connections are secure, the issue may be with the actuator or control box, requiring professional diagnosis. |
| Unusual noise during operation. | Obstruction. Loose mounting. Internal wear. | Inspect for any objects obstructing the movement of the bed or actuator. Ensure the actuator is securely bolted to the bed frame. If noise persists and no obstruction is found, the actuator may require replacement. |
| Actuator stops working after short use. | Overheating due to exceeding duty cycle. | Allow the actuator to cool down for at least 18 minutes before attempting further operation. Adhere to the 2 minutes ON / 18 minutes OFF duty cycle. |
8. Specifications
Key technical specifications for the Richmat HJA1S Dual Actuator:

Figure 8.1: Product label displaying detailed technical specifications.
| Parameter | Value |
|---|---|
| Item No. | HJA1S |
| Input | AC 100-240V 50/60Hz IP20 |
| Stroke (Head) | 87mm |
| Stroke (Foot) | 69mm |
| Max. Load | 2 x 6500N |
| Duty Cycle | 10%, Max. 2min ON / 18min OFF |
| Part Number | 139080A1S0063 |
| Serial Number | SN1SA230700350 |
9. Warranty and Support
For warranty information and technical support, please refer to the documentation provided with your original adjustable bed frame or contact the manufacturer of your bed frame. If you purchased the Richmat HJA1S as a standalone replacement part, please contact the seller for specific warranty details and support options. Always provide your model number (HJA1S) and serial number (SN1SA230700350) when seeking assistance.