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Info from PDF files located on Sportcrafts website under manuals. E3 - No
speed sensor reading. Unit shuts down. This is the most difficult repair
diagnose. The speed sensor is connected to the frame of the treadmill near
the drive pulley on the front roller. There is a small magnet on the side of
the pulley wheel. The sensor tip must be no more than 5mm from the magnet. If
for any reason the distance is greater than 5mm the treadmill will
shutdown Adjust or replace speed sensor. Treadmill: Speed Sensor
Replacement 1. Make sure your treadmill is unplugged before you begin. 2.
Remove the motor cover located in the front of your treadmill, it is held on by
a few screws. 3. Locate your speed sensor; it is the small T shaped part with
a red and black wire coming from it. 4. Remove the 2 screws in the speed
sensor and remove the old sensor. 5. Place the adjustment holder on the frame
with the open holes facing the pulley wheel, the prongs facing up and way
from the pulley wheel. Insert the screws but don't tighten fully. 6. Now
place the speed sensor over the prongs with the square part facing the pulley
wheel and the red and black wire to the far right. 7. Plug the treadmill
back in and slide the speed sensor until it is 5mm from the magnet inside the
pulley wheel, you may have to do this several times until you can position it
so it no longer shuts down. Use 2 nickels to figure out the spacing. The
width of 2 nickels is 5mm. 8. Once you find the correct position tighten the
screws all the way; being careful not to touch any of the other
electronics 9. Place the motor cover back on and enjoy your
machine.
Also: Use an epoxy to glue it. It is a plastic that is difficult to adhere to.
It is a simple magnet and Hall effect transistor if you have 2 small wires. It usually attaches to the 1/8 inch mini plug. You can test it with an analog meter, the resistance will be stable at rest, and with treadmill in motion, the resistance will change as the magnet passes the hall effect switch. moving the track at slow speed manually will be enough to see the needle move. Speed is calculated off of the rate of those pulses.
Contact the manufacturer. You need the optical disc. It is the speed sensor. Eric
For Treadmill replacement parts, please contact our Consumer Affairs Dept. at (800) 526 - 0244
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