1. Introdución
Thank you for choosing the Osaki OS-4000LS Zero Gravity Heated Massage Chair. This manual provides essential information for the safe and effective use, assembly, operation, and maintenance of your massage chair. Please read this manual thoroughly before using the product and retain it for future reference.
The Osaki OS-4000LS features an advanced L-track massage system, extending from your neck down to your glutes and thighs. It incorporates zero gravity recline, space-saving technology, foot rollers, 24 airbag compression massage, body scan technology, and adjustable shoulder massage for a comprehensive relaxation experience.
2. Instrucións de seguridade importantes
AVISO: Para reducir o risco de queimaduras, incendios, descargas eléctricas ou lesións a persoas:
- Desconecte sempre a cadeira da toma de corrente inmediatamente despois de usala e antes de limpala.
- Non o use mentres se baña ou na ducha.
- Non coloque nin almacene o aparello onde poida caer ou ser tirado nunha bañeira ou pía.
- Non coloque nin deixe caer na auga ou noutro líquido.
- Nunca use alfinetes ou outros elementos de fixación metálicos con este aparello.
- É necesaria unha estreita supervisión cando este aparello é usado por, sobre ou preto de nenos, inválidos ou persoas con discapacidade.
- Use este aparello só para o seu uso previsto, tal e como se describe neste manual. Non use accesorios non recomendados polo fabricante.
- Never operate this appliance if it has a damaged cord or plug, if it is not working properly, if it has been dropped or damaged, or dropped into water. Contact customer service for examination and repair.
- Manteña o cable lonxe de superficies quentes.
- Nunca utilice o aparello coas aberturas de aire bloqueadas. Mantén as aberturas de aire libres de pelusas, cabelos e similares.
- Nunca deixe caer nin introduza ningún obxecto en ningunha abertura.
- Non use ao aire libre.
- Non opere onde se utilicen produtos en aerosol (spray) ou onde se administre osíxeno.
- Para desconectar, xire todos os controis á posición OFF e logo retire o enchufe da toma.
- Non se coloque sobre nin dentro do aparello. Use só estando sentado.
- Non o use en zonas de pel sensibles ou en presenza de mala circulación.
- Do not use on infants, invalids, sleeping or unconscious persons.
- Do not use if you have any medical conditions without consulting your doctor.
3. Configuración e montaxe
The Osaki OS-4000LS massage chair is delivered in two main boxes for easier handling. While assembly is designed to be straightforward, it is recommended to have at least two people for moving the main frame due to its weight.
3.1 Unboxing and Positioning
- Carefully open both boxes and remove all packaging materials. Inspect all components for any signs of damage.
- Locate the main chair frame. Utilize the built-in rollers at the bottom of the chair to carefully maneuver it to your desired location. Ensure there is sufficient space around the chair for recline functions, especially considering its space-saving technology.
- Coloca a cadeira sobre unha superficie plana e estable.
3.2 Montaxe de compoñentes
Follow the specific assembly instructions provided in the separate assembly guide included with your chair. Typically, this involves:
- Attaching the footrest assembly to the main chair frame.
- Connecting any necessary cables between the footrest and the main unit.
- Securing the side panels or armrests, if they are separate components.
- Connecting the power cord to the chair and then to a grounded electrical outlet.

Image 1: Osaki OS-4000LS Massage Chair, fully assembled.
4. Instrucións de funcionamento
Familiarize yourself with the control panel (typically located on the armrest or a tethered remote) to operate your massage chair.
4.1 Encendido/apagado
- Preme o POTENCIA button to turn the chair on. The chair will typically perform an initial body scan.
- Preme o POTENCIA button again to turn the chair off.
4.2 Body Scan Technology
Upon activation, the OS-4000LS utilizes advanced body scan technology to map your unique body shape and adjust the massage rollers for optimal coverage and intensity. Ensure you are seated correctly for an accurate scan.

Image 2: Illustration of the Computer Body Scan feature.
4.3 Zero Gravity Recline
Activate the Zero Gravity function using the dedicated button on the control panel. This position elevates your legs above your heart, distributing your body weight evenly and reducing pressure on the spine for a deeper massage experience.

Image 3: The chair in a Zero Gravity Recline position.
4.4 Massage Programs and Styles
The OS-4000LS offers various preset massage programs and 6 distinct massage styles. Use the control panel to select your desired program or customize your massage:
- Programas predefinidos: Choose from a selection of automatic programs designed for different needs (e.g., full body, relaxation, stretch).
- Control manual: Adjust massage techniques (e.g., Kneading, Tapping, Shiatsu), intensity, speed, and roller width.
- L-Track Massage: Experience comprehensive massage coverage from your neck to your glutes and thighs.

Image 4: Diagram illustrating the L-Track Massage system.

Image 5: Visual representation of the 6 available massage styles.
4.5 Airbag Compression Massage
The chair features 24 airbags strategically placed to provide compression massage to various body parts. Adjust the intensity of the airbag massage as desired.

Image 6: Diagram highlighting the 24 Airbag compression system.
4.6 Foot Rollers and Extendable Ottoman
The footrest includes foot rollers for a soothing foot massage. The ottoman is spring-loaded and extendable to accommodate users of different heights. Always wear socks when using the foot rollers, as the covers are not removable for washing.
4.7 Lumbar Heating Pad
Activate the lumbar heating function for gentle warmth that helps to relax muscles in the lower back area.

Image 7: Illustration of the Lumbar Heating Pad location.
4.8 Adjustable Outer Shoulder Massage
The shoulder massage components can be adjusted to fit various shoulder widths, ensuring a personalized massage experience.

Image 8: Depiction of the Adjustable Outer Shoulder Massage feature.
Estación de carga USB 4.9
A convenient USB charging port is integrated into the chair, allowing you to charge your devices while enjoying a massage.
5. Mantemento e coidados
Un mantemento axeitado garante a lonxevidade e o rendemento óptimo da súa cadeira de masaxe.
- Limpeza: Unplug the chair before cleaning. Wipe the chair's surface with a soft, damp pano. Non empregue produtos de limpeza abrasivos, solventes nin produtos químicos agresivos.
- Foot Roller Covers: The foot roller covers are not removable for washing. Always wear socks when using the foot massage function to keep the area clean.
- Almacenamento: If storing the chair for an extended period, unplug it and cover it to protect it from dust. Store in a cool, dry place.
- Cable de alimentación: Regularly inspect the power cord for any damage. If damaged, contact customer support immediately.
6 Solución de problemas
If you encounter any issues with your Osaki OS-4000LS massage chair, please refer to the following common solutions:
| Problema | Causa posible | Solución |
|---|---|---|
| A cadeira non se acende. | Power cord not properly connected; power outlet issue; main power switch off. | Ensure power cord is securely plugged into both the chair and a working electrical outlet. Check the main power switch on the chair. Test the outlet with another device. |
| Massage rollers are not moving or are stuck. | Obstruction in the roller path; temporary system error. | Turn off the chair, unplug it, and check for any obstructions. Plug it back in and restart. If the issue persists, contact customer support. |
| Airbags are not inflating or deflating properly. | Air hose disconnected; pump malfunction; system error. | Check for any visible disconnected air hoses (refer to assembly guide). Restart the chair. If the problem continues, contact customer support. |
| Foot rollers cause discomfort. | High intensity setting; sensitive feet. | Reduce the intensity of the foot massage. Ensure you are wearing socks. If pain persists, discontinue use of the foot rollers. |
If these solutions do not resolve the issue, please contact Osaki customer support for further assistance.
7. Especificacións
| Característica | Especificación |
|---|---|
| Número de modelo | OS-4000LS |
| Peso do elemento | 250 libras |
| Dimensións do produto (L x W x H) | 63 x 30 x 47 polgadas |
| Massage Track | L-Track |
| Función de reclinación | Zero Gravity, Space Saving |
| Sistema de airbag | 24 airbags |
| Función de calefacción | Lumbar Heating Pad |
| Características adicionais | Foot Rollers, Extendable Ottoman, Body Scan Technology, USB Charging Station, Adjustable Shoulder Massage |
8. Garantía e soporte
The Osaki OS-4000LS massage chair comes with a manufacturer's warranty. Please refer to the warranty card included with your purchase for specific terms, conditions, and duration of coverage. Retain your proof of purchase for warranty claims.
For technical support, warranty service, or any questions regarding your massage chair, please contact Osaki customer service. Contact information can typically be found on the manufacturer's websitio web ou na documentación da súa garantía.
When contacting support, please have your model number (OS-4000LS) and purchase date readily available.