Trimline 7150 treadmill giving "Err L5"

Dave and Teri · electronics forum beginner Joined: 09 May 2005 Posts: 1

Hi all,
Hope you can help. After we moved our treadmill, it worked fine for a
day, but now when we power it on and try to start it, after a few
seconds, we hear a click from the circuit board area and get an "Err
L5" error on the console.

With a multimeter, I could not detect 120 volts going to the motor
before the click. Do you think we have a problem with the circuit
board? There are many lights on it but I don't know what they mean. I
tried to "calibrate" but never got the "CAL PASS" the manual says to
expect if it is successful.

Thanks,
Dave

puckett_jw · electronics forum beginner Joined: 03 Sep 2006 Posts: 2

puckett_jw · electronics forum beginner Joined: 03 Sep 2006 Posts: 2

Just incase people other come here looking for the answer...

As it turns out, the error was "Err LS" not "Err L5," which is for the speed sensor. If you open the cover, you will see the main circuit board, and there will be a black wire that runs from that board to a sensor just beside the pulley that is on the end of the roller that turns the belt. Here is what I did to test the sensor....

1) Align the magnet on the pulley to see if the LED just beside the plug on the main board comes on. If it does not, see if there is any slack in sensor wire to get the sensor a little closer. The sensor needed to be about 1/8 of an inch from the magnet.

2) Unplugged the sensor from the main board and tested to see if the circuit closed when the magnet got close to the sensor with a multi-meter.

3) Shorted the two wires in the plug to see if the LED comes on.

At this point, my LED came on, so I knew that my main board was good and that the senor must be bad. I ordered a new sensor, and everything now works.

Hope this helps someone else...

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