Nortrak 4100i wont go up or down - Nordic Track Nordictrack Apex 4100i Treadmill User Part Manual

1) Faulty sensor speed try to adjust it face to face magneto motor
2)Sensor speed try to tight the connector very well.
3) Replace if neceesary.4) Main motor faulty or burn. Test 115vac for input measure without load fore easy running.
5) Test the main motor controller board for 115vac input and output for +5VCD,
6) Adjust the deck bel for 2-3" for lift max.
7)Lubricate the deck bel.
8) Test the transformer for input and secondary voltage.
See the block diagram for illustration how the main motor controller has 90% aprox of function of any treadmills.

sincerely. Merry Christmas.

ernesto cuadra
managua, nicaragua. c.a.

Watch this videos tips:
http://www.youtube.com/watch?v=qgb2TY3WCkg&feature=related
http://www.youtube.com/watch?v=-oeXTKqWECw&feature=related
http://www.youtube.com/watch?v=GPI6dFJCUA4
http://www.youtube.com/watch?v=bF3OyQ3HwfU&feature=related
http://www.fixya.com/support/r10724803-measure_voltage_in_transforme_fitness
http://www.fixya.com/support/r10786838-test_procedure_dc_motor

Please see carefylly this videos +Tip for instructions. Normally the voltage is main terminal for motor will be 110-115Vac, but carefully in other case will be 220Vac-230Vac, I recomend that you measure the Outlet( receptacle from the wall) if there are 115 or 230Vac Single Phase.

sincerely.

E.CUADRA

Try the calibration procedure found in the troubleshooting section of your manual first. Here are the basic instructions.
With the key in the console, press one of the Incline buttons. While the incline is changing (or the numbers on the console) , remove the key. After a few seconds, re-insert the key. The treadmill will automatically rise to the maximum incline level and then return to the minimum level. This will recalibrate the incline.
If it still doesn't move, remove the cover. Find the incline motor. You will see a slot in the end of the motor. Using a drill with a standard slotted screwdriver bit, spin the motor counterclockwise (if it is having difficulties spinning, turn clockwise instead) for just a couple seconds. Now do the calibration procedure again.
I have had machines that got stuck before. Once released and recalibrated, the operation was OK.
The service number for your machine is found on the model number sticker on the frame of the treadmill.

Sorry to inform you, that part is no longer available from the manufacturer.

You can try and do a re-calibration on the treadmill (Its listed in the Users Manual) but it sounds like the console has gone bad. To repair this you would have to replace the entire console.

If the console lights up but the buttons don't work, then unfortunately it's probably the console and they're not repairable that I know of. You may want to check the wiring harness and the connections at the console and at the controller under the motor hood. Pull them apart and check for bent pins. If they look good, the console is most likely bad.

You need to have the power supply board rebuilt with larger Caps and resistors. Look on the internet under treadmill repairs. The board is easy to replace yourself so don't have someone come in and overcharge you. I think about 4 screws and two plugs.

try caibrating it.

Go to Nordiactrac.com and enter your Model number from the sticker on the frame. It should read NTL or NTTL then 4 or 5 number. Folow the instructions and ask for the Part's List. You should be able to find it there.

Try this calibration procedure.
Turn the power switch on. Remove the safety key. Hold the Stop and Speed Up or Speed Plus buttons down then insert the safety key.
The display should show some numbers.
Press the stop key one time and the display should show some other numbers and some 00's. Press the Incline Up button and see if the Incline begins to move, if it does let it go all the way up and then all the way down, wait a few seconds after it stops, then hit the stop key 4 times. It should be calibrated. If it didn't move then the board or the incline motor is bad.