SF-RB4850 Sensor Troubleshooting Guide

 

Comprehensive Guide

If your computer shuts down unexpectedly after just four minutes or fails to respond to any movement, this guide is for you. The issue may stem from an internal sensor designed to detect movement, which interacts with a magnet located on the belt wheel. Before you dive into repairs, it’s essential to troubleshoot potential problems. Follow the steps outlined below to identify any issues and ensure your equipment is functioning correctly.

 

STEP 1: CHECK THE RAINBOW WIRES

You will need to partially disassemble the unit to inspect the wiring.

Start at the top of the computer and work your way down.

Check the computer wire, extension wire, and the wire at the lower end of the frame.

 

Note: Please check your crank version before proceeding to the next step.

 

Crank Versions

 

STEP 2: ACCESS THE SENSOR WIRE

1. Remove the Left and Right Pedals.
2. Remove the Securing Nut for the Power Port:

 Push the power port through the cover to avoid damaging the wiring.

3. Remove the Screws on the Covers:

Use a Phillips screwdriver to remove the screws and carefully maneuver the covers off the cranks.
For 3-piece cranks, you'll need a 22mm crank puller to remove the crank and access the motor. Contact us if you need help with this tool.


4. Access the Interior of the Equipment.

Instructional Videos: 

OPC Model: 0:00 to 2:30 for the cover removal process 

3-Piece Model: 0:00 to 4:20 for the cover removal process 

 

STEP 3: INSPECT THE SENSOR

1. Locate the sensor on the right side of the belt wheel.
2. Follow the sensor wire to the motor, unplug it, and plug it back in.

3. Check for Excess Hot Glue:
If there is too much glue, it might block the signal. Carefully peel away any excess glue around the sensor.

4. Check the Distance to the Magnet:

The sensor may be too far from the belt wheel’s magnet. Loosen the screw on the sensor bracket to adjust it closer.

5. Test the Sensor Wire with a Magnet:

Pull the sensor wire from the bracket and wave a magnet over it. If the computer doesn’t register the magnet strokes, the sensor wire may be faulty.

 

Video Reference for Sensor Wire Test: Watch here.

 

If none of these steps resolve the issue, we may need to replace the sensor wire. Please contact us.

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