Merax JS-904J User Manual (English)

Questions and Answers:

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Brandon BarnesAug 3, 2025
What to do if Merax JS-904J Massager stops working automatically during massage?
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  alvarezlauraAug 3, 2025
  Your Merax Massager might stop automatically due to several reasons. It could be that the fixed working time is over, or the power is off. Try restarting the chair and checking the power socket to ensure a good connection. Another reason might be that the chair is overheating from prolonged use, which activates the automatic protection device. In this case, turn off the power and restart the massager when its internal temperature returns to normal. Also, external power supply disturbances can cause this issue; try turning off and restarting the massager.
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Nicole MurrayAug 9, 2025
Why do the buttons on my Merax JS-904J controller not work?
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  Amanda RodgersAug 10, 2025
  If the buttons on your Merax Massager controller aren't working, it could be due to a few reasons. First, check if the main power supply switch is turned on and ensure the controller is properly connected to the electric cabinet through the interface. Also, make sure the power supply plug is firmly inserted into the socket and that the fuse hasn't burned out. If it has, replace it with a new fuse of the same type.
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timothydelgadoAug 15, 2025
What to do if some buttons on Merax Massager controller cannot work?
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  nicoledouglasAug 15, 2025
  If some buttons on your Merax Massager controller aren't working, it might be because the controller is in direct contact with foreign matter. To resolve this, turn off the power supply, clean the control panel, and then turn the power supply back on.
J
Jerry SmithAug 21, 2025
Why does my Merax JS-904J Massager roller stop working?

Merax JS-904J Specifications

General

Brand	Merax
Model	JS-904J
Category	Massager
Language	English

Summary

General Safety Precautions

Environmental Precautions

Precautions for using the massage chair in different environments to prevent electric shock or fire.

Preparation Before Use

Steps and checks required before operating the massage chair, including grounding and power supply.

User-Specific and General Precautions

Precautions for Specific User Groups

Advises consulting a doctor for certain medical conditions and sets usage limits.

General Usage Precautions

Safety guidelines to prevent injury during operation, including body wetness and nakedness.

Additional Precautions

Power Connection

Instructions for connecting the power cord and ensuring proper grounding for safe operation.

Post-Use and Storage Precautions

Guidelines for shutting off power, unplugging, and precautions during thunderstorms or maintenance.

Parts of the Chair

Remote Control Functions

Moving and Operation Procedures

Moving and Pre-Use Setup

Instructions for moving the chair, ensuring sufficient space, and connecting power.

Massage Operation Procedures

Details on starting massage, automatic vs. manual modes, and adjusting strength and timing.

Assembly Instructions

Controller Button Functions

Explains the function of various buttons on the massage chair's controller for operation.

Merax JS-904J User Manual

Table of Contents