Model #831297890 PROFORM Treadmill

  • 831.297890
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Question and Answers

Q:

"I have a Sears Treadmill m/n 831.297890, s/n J92116937. It has a running problem.

A:

It always seems hard to stay is shape during the winter months. I'm sorry to hear that you are having some difficulties with your Proform Tradmill. I did some research for you at Managemylife and found an expert answer to a similar question that may help until your expert can respond to your specific question. The link is attached below. If you do decide to schedule service and have a qualified technician help you, I have also attached a link to Searshomeservices. I hope these links provided assist you.

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James -
February 21, 2012
A:

Here is an explanation of the controller LED's on your machine:



A new feature of these controllers is four troubleshooting LEDs that can be used to troubleshoot the controller when repairing a treadmill. They indicated when the controller is receiving the expected control signals and outputting the required voltages. Each LED is displayed below:



D6- Labeled SCR. Indicates that the SCR is triggering on the controller. If this light is out, no voltage will be sent to the motor. Note that this LED will vary in brightness, depending on the speed setting. If this LED does not light when the safety key is inserted and D7 is lit (indicating a speed setting other than zero MPH), the controller will need to be replaced.



D7- Labeled SPD CTRL. This LED indicates that the controller is receiving a speed signal from the console. Note that on consoles without a power board that use a speed pot, the LED will light solidly, but vary in intensity at different speed settings. On consoles that use a power board, the LED will flicker with the PWM control signal. The brightness of the LED will vary with the speed setting.



D11- Labeled +12V. This LED indicates that the controller is outputting 12 VDC at the H spade connector. It should be lit at all times the controller is receiving voltage. If this LED does not light when the controller is receiving AC voltage, the controller will need to be replaced.



D16- Labeled CUR LIM. This LED lights ONLY when the amperage draw of the treadmill is nearing the current limit setting. If this LED lights frequently, it indicates a worn walking belt or board, or that the walking belt or drive belt is too tight.



The power board LED information is: LD1- Labeled 120 V. This LED indicates the power board is receiving 110-120 VAC from the wall outlet. This LED should be lit at all times the treadmill is plugged in AND the main on/off switch by the power cord is turned on. If it is not lit, check the circuit breaker and wiring to find the cause of the problem.



LD2- Labeled PWM. This LED operates differently than the other LEDs. Rather than being lit at all times, it will only light when the power board is receiving a speed control signal from the console. When speed is set to 0.0 MPH, this light will not be lit. At other speeds, it will come on. This LED will flicker with the PWM signal. Overall brightness of the LED will vary with the current speed setting. The higher the speed setting is, the brighter the LED will become.



LD3- Labeled CNSL POWER SUPPLY. This LED indicates the power board is generating the 8-12 VDC required by the console to operate. It should be lit at all times the treadmill is plugged in and the main on/off switch by the power cord is turned on. If this LED is not lit, but LD1 does light, it indicates the power board is not generating a DC voltage and will need to be replaced.



LD4- Labeled SENSOR PWR. This LED indicates the power board is generating the 5 VDC needed for the speed and incline optic switches. It should be lit at all times the treadmill is plugged in and the main on/off switch by the power cord is turned on. If this LED is not lit, but LD1 does light, it indicates the power board is not generating a DC voltage and will need to be replaced.



You said initially the machine would come on and that you just couldn't adjust the speed. Do you mean that press the button and nothing happens or did you mean that you press the buttons and the speed will increase but the motor doesn't actually move. I ask because if you press the increase speed button and nothing on the console changes then the problem would be within the console. Or there could be multiple problems.



Because you found some board components bad, I have to believe the problem is with the controller. The motor is effectively only dealt with by the controller and most problems with no belt movement are an issue with the controller. As for the boards themselves, the manufacturer states they are not serviceable and they provide very little information about them. I figure it's mostly for proprietary reasons, but they won't assist anyone with working on them.



Let me know what you find out. Thank you for using Manage My Life!

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XX Wade_ -
Sears Technician
February 22, 2012
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Q:

treadmill model # 831.297890 I replaced the walking belt and aligned it and recalibrated it and now it is very loud and clanky particularly at the lower roller

A:

I understand that your treadmill is making a clanking noise. I have taken some time to research your question here on the Manage My Life website and I noticed that someone else had asked a similar question with a posted response from an expert. I attached the link below for you to view. I hope the link that I provided is helpful. Have a nice day.

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Alina F. -
October 02, 2011
A:

We need to make sure the walking belt is not too tight. Raise the incline up all the way and stand at the front of the walking platform. Then give yourself a little bit of a shove and see how far you slide back. If you go less than 75% of the way back, the belt is too tight. A quick note: If you do this with a NOT NEW belt, it can be caused by the belt being worn out. Since you just replaced your belt though, we know that's not the issue.

If you do that test and you do slide back about 75% of the way, then the belt is fine and it's just the roller bearings wearing out (what I suspect). If it looks like it is indeed the rear roller, you can order a new one (pt 140704) from HERE .

Thank you for using Manage My Life!

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XX Wade_ -
Sears Technician
October 04, 2011
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Q:

Why won't the distance and calorie counter work on my Proform EKG treadmill?

A:

You could have a failed console or a problem with the power board. You could also have a problem with the reed switch on the speed sensor. I provided all of the technical information for the control boards and console in the images below. This technical information provides live voltage checks that can be made between the power board and the console. I do not recommend that you take these live voltage readings unless you are completely confident in your technical ability to safely execute the checks described.

First, unplug the treadmill and check the wiring connections between the power board and the console. Also check the wiring between the speed sensor and the power board. If you are able to safely make the voltage checks described below, you may be able to determine the source of your problem. If you are not able to get the proper signal (pulsing 5 VDC when belt is moving) from the speed sensor to the power board, the speed sensor will need to be adjusted or replaced. If the speed sensor is working, your problem will either be in the power supply board or the console. One of these components will likely need to be replaced.

You can order parts from the Sears PartsDirect website.

If you need more help, resubmit your question with additional details.

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Lyle W -
Sears Technician
November 18, 2009

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