TURN ON A CODE L5 LIGHTS UP - Landice L7 LTd Pro Sports Trainer Treadmill
L5 is really LS (Lose signal ) this occurs when the speed sensor is not functioning or no belt movement. Unplug unit remove motor shroud then plug unit back in, now stand on foot panels you will notice LED lights coming from the Motor Control Board, press start at this time you will manually with you foot start pushing the belt. What this will show you that if the speed sensor is working properly one of the lights will start flickering and the upper panel will register this pulse signal and the time should work.
If you get a LS again then the speed sensor is defective and needs to be replaced, this sensor is located on top of the drive motor with 2 bolts attaching it to the motor body. Now if the sensor is functioning their is 2 other possibilities 1) Worn motor brushes 2) Motor Control Board Has Failed.Unplug Unit.
The easiest to test out of the 2 is the motor, by using a 18v fully charged drill battery disconnect the lead from the motor going to the motor control board attach the leads to the battery and the motor should start to rotate if not replace worn brushes. If the motor rotates then you may have a defective motor control board.
To test this portion you will need a multi-meter place leads where you disconnected the motor leads put meter range @ 20v DC plug in unit and start the unit, when you hear the click you should see about 5v DC = .5 MPH and their should be another LED light flickering as soon as you hit the start key this is the PWM signal which is generated from the upper board and travels thru the terminal harness. This tells you that both board and harness is working properly.
My suggestion is that it is either the sensor or the brushes these are the 2 that commonly fail. Read More At : L7 LTd Pro Sports Trainer Treadmill...