Tread belt will not move

From the User manual....here
http://servicedocuments.com/pdfs/_0005_SOLE/_0005_SOLE_01_Treadmills/003_OwnersManuals/2010_2011_SOLE/F63_F65_OM_810.pdf

'1.If the belt moves, but stops after a short time and
thedisplay shows "LS", run calibration. (on next page)
2.If you press start and the belt never moves, then
the display shows LS, contact service.

under the shroud cover there is a bolt that loosens the tension on the belt...be sure the belt sensor "sees" the belt as that is why you have an E-1 error code

You have the belt on wrong. There is a side with numbers or writing on it and ribbed side like treads. The tread side should be facing down, making contact with the drum. If the other side is touching the drum then whenever clothes are put in the belt will slip causing the drum not to turn.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/jason_4570d45317834dd3

Hello, it seem there could be something jamming the tread mill belt or the transmission gears coult be broken. There is a very good possiblity that the electric motor has goine south, it doesn't work, or seeze up might have to be replaced.
GB...stewbison

proform 625 belt slips cause

the pulley on the crankshaft should have grooves in it for the belt, otherwise the belt will not turn. is the pulley broken off, get back to me. there are NO technical servise bulletins on this item,if you need more help get back to me, Thanks Ray

Make sure treadmill is running when you adjust belt. The treadmill belt tracks as the belt goes around. I usually put machine on 2-2.5 if belt is not rubbing instantly. If belt is already against plastic, turn adj. counterclockwise on the opposite side about one full turn. You can usually move belt with your foot to see if it aligns any with turning on the treadmill. Once belt is not rubbing, turn treadmill on and continue alighing the belt.

DEAR
AT FIRST YOUR MOTOR CONTROL BOARD IS DAMAGE
I can turn it by hand it turns smoothly and the tread moves fine and the belt from the motor to the tread is good

in the back of the manual, it describes the adjustment for this. on the end of the platform (near where your belt is crooked) there is a hex nut. the manual says to turn the machine off before adjusting, i find it is much easier to do while the tread is still moving. turn it about a quarter or half turn one way or the other until the tread is aligned.

determine which side is off centered

If the tread is migrating from the left you need to adjust the tension adjustment on the right and side of the roller and make it tighter

Most adjustments are made by turning a set screw that moves the idler roller ( the roller that is at the end of the tread mill which is where you first get on)

TO ADJUST:

1 TURN THE POWER OFF AND UNPLUG AT WALL OUTLET

2 Locate the adjustment screw( remember you will adjust the side opposite the migration to tighten the roller)

3 manually force the treadmill belt over toward the proper path( I do this by taking my hand and sliding my fingers under the belt and lift the belt as I hand roll it

4 Turn the adjustment screw counter clockwise one revolution

5 plug in then turn on and see if it stays in place

6 Keep repeating the process ( steps 1,2,3,and 4 )