Why do I get error code L5 on Bowflex 7 series treadmill?

Hi There, L5 error should refer to the "LS" error which looks up to a speed problem. When you start the machine up, it boots fine and then when you press start or go is says err ls ? If the walking belt doesn't move at all when you try to start it, listen for a "Click" on that lower board when start is pressed..... If the walking belt moves for a second and then stops and the console says err ls, then you may have a speed sensor problem. These control boards are repaired by Jatinah Electronics who can be found with a google search. Good Luck!

If you wish to get some details; check the site linked here. Pull up older posts.
http://electro-medical.blogspot.com/

Replacement Parts for Fitness Exercise Equipment at SPORTSMITH


It is common to see this error as and L5 error, but it is actually an LS error. The following information will define this error and give you the possible solutions to fix this issue.

LS Error with No Belt Movement on Landice Series Treadmills

LS Error on Landice L-Series Treadmills with No Belt Movement Probable Cause A LS error on the Landice L-Series treadmills can also look like L5 and this error code means there is a loss of speed signal. If this error occurs with no belt movement, the causes for the LS or L5 error are:A) Faulty upper display board or faulty relay board
B) Improper speed control wiring
C) Improper motor control wiring
D) Worn or faulty motor brushes
E) Faulty pwm/relay combo board or faulty drive motor
Corrective Action A) Enter Open Loop Speed mode and set treadmill speed to confirm proper line voltage to pwm board and that the green BELTSW light is lit on the relay board. Replace upper display board or relay board if necessary.
B) Inspect speed control wiring and correct wiring if necessary:

1. Checking purple wire from V+ on pwm board to P3 on the relay board
2. Checking orange wire from P1 on pwm board to P1 on the relay board
3. Checking brown wire from P2 on pwm board to P2 on the relay board
4. Confirm P3 on pmw board has no connection

C) Inspect motor control wiring, checking wires from motor to A+ and A-. Correct wiring if necessary.
D) Inspect motor brushes verifying brushes slide freely, are at least 3/8" long, are curved and have no burns or cracks. Also check the brush springs and verify that the brush copper wire is not burned or broken. Replace both motor brushes if necessary.
E) Inspect motor turns and is not seized up or has a broken shaft. Replace motor if necessary. Also verify at least 90VDC present from the black (A+) wire and white (A-) wire from the pwm board to the drive motor. If voltage is present, replace pwm/relay combo board. If no voltage present, replace drive motor.
Details about LS Error on Landice Series Treadmills with Belt Movement
LS Error on Landice L-Series Treadmills with Belt Movement Probable Cause A LS error on the Landice L-Series treadmills can also look like L5 and this error code means there is a loss of speed signal. This error can occur with belt movement but speed will not increase. Causes for the LS or L5 error with belt movement are:A) Speed sensor is out of adjustment
B) Speed sensor is damaged or faulty
C) Display cable is damaged or faulty
D) Improper speed control wiring Corrective Action A) Speed sensor should sit parallel with the flywheel and gap between speed sensor and flywheel should be within 1/16". Adjust speed sensor if necessary.
B) Inspect speed sensor connector to relay board. Check for pushed pins or loose wires. Repair or replace speed sensor assembly if necessary.
C) Inspect upper harness or display cable connector to relay board. Check for pushed pins or loose wires, giving specific attention to pin 5 (brown) and pin 9 (green). Repair or replace display cable if necessary.
D) Inspect speed control wiring:

1. Checking purple wire from V+ on pwm board to P3 on the relay board
2. Checking orange wire from P1 on pwm board to P1 on the relay board
3. Checking brown wire from P2 on pwm board to P2 on the relay board
4. Confirm P3 on pmw board has no connection

Correct speed control wiring if necessary.

It looks like the main circuit board is damaged and needs to be replaced unless there are separate modules in it.

this meand 2 alternatives:
1) problem with the display board adjust the reed switch
see the diagram
2) mean the elevation motor; lube the gear and shaft ,and adjustment the potentiomenter, and check the voltage input motor .
God bless you

There are four typical causes for this problem :

1) The walking belt and/or deck are worn. (85% of the time)
2) The walking belt and/or motor belt are too tight- if you have adjusted either recently. (8% of the time)
3) The motor has lost torque and needs brushes or has demagnetized. (5% of the time)
4) The controller board is dropping output. (2% of the time) . You can do it foryourlsef. However i will give some websites FOR TO CONTACT THEM:

www.unitedassemblers.com + www.treadmildoctor.com

Sincerely. Merry Christmas.

ERNESTO CUADRA
MANAGUA, NICARAGUA.

L5 or LS is short for Low Speed error

It basically means that the speed sensor is not picking up a signal. Unfortunatley its a pretty vague error code and can be caused by several different problems.

First you have to determine wether or not you have belt movement. If you have a LS with belt movement you know that it is related to the speed sensor itself (or the MCB motor control board - the part of the MCB that handles speed sensing function). If you are getting an LS w/belt movement you have to check to see if you have power output from the MCB. If you have no power output, check fuses, if fuses are good you will need the MCB replaced.

Hope this helps (remember to rate this answer).

Here is a GREAT FIXYA Post from 2013 that addresses your error code, "L5"

TREADCLIMBER tc5000 error code L5

Anthony

This is a LS or speed sensor error, it can be caused by a belt that is too tight, non lubricated walking belt and or a bad sensor. If the belt does not move at all, Bowflex will tell you to buy a new lower control board. $227 direct from them (Nautilus)

The machine needs to be re-callibrated. L5 error.
Your speed sensor must have been damaged either during shipping or use. You'll need a new one. If under warranty - give Bowflex a call. They will ship you out a new sensor and guide you through installing it via the phone... re-calibrating the machine... and getting it operational again. It will take about 2 hours.

The instruction book doesn't mention calibration. be sure to not callibrate in metrics, however (there's no way to easily tell the difference - you have to ask) or you'll be strolling like a walk in the park at 5 "mph".

Thanks for using FixY - a FixYa rating is appreciated!!