My Nordic T18 Threadmill stopped working. So I am trying to troubleshoot if it is the motor or the control board MC2100 ELS.

I have disconnected the motor and bypassed the blue heat cables. The led's are displaying as expected. If i measure the voltage at LG5 and LG6 at any speed without the motor I am reading 13.5 V. Is this correct?

PS: I was unable to get the motor running on a 12V supply. I am going to try a higher DC V to eliminate if it is a motor problem.

 

Not sure what differences there are with the standard MC2100 RevB?
But there is usually one LED LD1 and it indicates full on when the board is powered and goes to a slow on-off flash as it receives a PWM commands signal into HD2.
It has its own internal on board supplies.
Maybe show a Pic of the board.
Max.

 

Good afternoon dear Sirs,
i need your opinions...

I'm trying to repair a MCS2100-ELS circuit board.
At the begging i found that the IGBT (Q6) G4PC40K was short circuited. Also the SCR (Q3) S8025L was damaged. The other components seemed to be ok.
i have replaced the 2 damaged components and i supplied the pcb wit 230v at (AC Neut - AC Hot) LG2.
Everything seemed to be Ok. I had 11,5V at LG5 and measuring +5V at HD5 (without the motor connected to the PCB)
The LD1 was always on, nevertheless every 55 seconds it bllinks on time and then returned to be on for more 55 sec.

A few moments ago, i supplied the pcb the same way but the LD1 doesn't turns on. The LD1 just turn on (for about 18 seconds) when i disconnect the power supply (230V). (At LG5 i still have 11,5V and +5VDC ate HD5).
I don't know what happened for this is occurring but i checked some self at the wall socket when i plug the jack for 230V.

Should be something in short circuit? Could the controller be damaged?

Thank you very much in advance.

 

The LED is a sign that it is receiving a signal and also if anything is amiss.

The MC-2100 has a single troubleshooting LED. Unlike earlier motor controllers, which had several LEDs monitoring different conditions, the MC-2100’s LED can give multiple signales. Each LED state and its meaning is given below:

• OFF - The controller is NOT receiving AC voltage
• ON (Solid) - The controller is receiving AC voltage, but is not receiving a speed signal.
• ON (Blinking rapidly) - The controller is receiving a PWM signal and is sending voltage to the drive motor (A+ and A-).
• ON (Blinking on and off once per second) - The controller is operating near its current limit. This indicates the controller is working harder than it should to maintain treadmill speed. Check for friction problems between the board and belt, an over tightened belt, or check the roller bearings.
• ON (Blinking VERY slowly, on one second, off one second) - The controller has entered its ‘fold-back’ mode. This means the controller is working as hard as it can to turn the drive motor without success. It then ‘folds back,’ or reduces, the voltage and amp draw of the drive motor to prevent overheating.

Max.

 

The LED is a sign that it is receiving a signal and also if anything is amiss.

The MC-2100 has a single troubleshooting LED. Unlike earlier motor controllers, which had several LEDs monitoring different conditions, the MC-2100’s LED can give multiple signales. Each LED state and its meaning is given below:

• OFF - The controller is NOT receiving AC voltage
• ON (Solid) - The controller is receiving AC voltage, but is not receiving a speed signal.
• ON (Blinking rapidly) - The controller is receiving a PWM signal and is sending voltage to the drive motor (A+ and A-).
• ON (Blinking on and off once per second) - The controller is operating near its current limit. This indicates the controller is working harder than it should to maintain treadmill speed. Check for friction problems between the board and belt, an over tightened belt, or check the roller bearings.
• ON (Blinking VERY slowly, on one second, off one second) - The controller has entered its ‘fold-back’ mode. This means the controller is working as hard as it can to turn the drive motor without success. It then ‘folds back,’ or reduces, the voltage and amp draw of the drive motor to prevent overheating.

Max.

Thank you very much for your explanation Max.
Even though, do you have any tip for the fact of suddenly the LD1 turned off, but i still have the same voltages at LG5/LG6 and at HD5 that i had before (when the LD1 was on)?

I don't find any component in short circuited situation...

 

Try a ordinary lamp in place of the motor and see what happens
Is this still on a T.M., or is it being used in another function.?
Max.

 

Try a ordinary lamp in place of the motor and see what happens
Is this still on a T.M., or is it being used in another function.?
Max.

It is still being used on a Treadmill.

I'm just measuring the voltages at the mentioned points. The motor is not connected to LG5/LG6 because i have the board at my home and the treadmill and the motor is still in the owner's house.

I removed the IGBT from the circuit but it is still Ok

 

This link may help.
http://www.wolfteck.com/2017/11/25/mc2100-motor-controller-troubleshooting/
You need a functioning load, otherwise the LED won't indicate correctly.
Max.

 

This link may help.
http://www.wolfteck.com/2017/11/25/mc2100-motor-controller-troubleshooting/
You need a functioning load, otherwise the LED won't indicate correctly.
Max.

Once again, thank you very much Max.

Maybe i will try to connect the PCB with the motor and then i will follow your troubleshooting.
I appreciate a lot your help.

Kind Regards

 

Hi... I have a Nordictrack 9.1 with a 130VDC motor. Failed after a too-fast workout.
The in line motor works, but the treadmill motor fails to turn and the M+/M- voltage sites at 11.4VDC. When I connect the motor to 19VDC source (drill battery), the treadmill runs at a fast walk, strongly, and draws 1.7A.
I'm told by a support tech that the motor should draw <1A at 30VDC, my test is not adequate, and - at 1.7A draw, the motor has likely failed. The resistance M+/M- is about 3.5 ohms, either M to ground is infinite.
I'm thinking the problem must be in the controller board.
Is it possible the treadmill motor is faulty?
Thx... Paul

 

Is it possible the treadmill motor is faulty?
Thx... Paul

Very unlikely,. from my tests the readings you get are not that far off.
What is the version of the main board?
Max.

 

Very unlikely,. from my tests the readings you get are not that far off.
What is the version of the main board?
Max.

Bottom of board: MC2100ELS 18W Motor Controller Rev -
and just above this... #4679
Sticker in the middle of the board - 279167

Thanks for the fast reply!
... Paul

 

What is the Ind LED showing?
Should be steadily lit and then blink steady with a command signal.
Max.

 

What is the Ind LED showing?
Should be steadily lit and then blink steady with a command signal.
Max.

The LED doesn't light up at all.

 

Then one reason is it is not recieving a command pulse, this is a PWM signal on HD2 pin 1 & 4 (blk & blue).
Also check the 12vdc LV supply and also the 5v regulated.
Max.

 

I have a mc2100 on a treadmill that stopped working.

-Initially it was not working at all I found R17 burnt so I replaced it and Q1

-Next the motor would come on very fast then shut down immediately I found U2 to be bad and replaced it.

-Next the motor comes on full speed on all speed settings and continues to run with motor sparking its running so fast. I removed the mosfet and found it to be shorted so I replaced it and tried it again only for it to go full speed again and the mosfet was shorted again. You can still switch the motor on and off even with the mosfet shorted it just goes full speed everytime.

I also tried a bench test and I see 108VDC when any pwm signal is supplied.

I am now looking at U5 and D13 could one of these be causing the mosfet to constantly be shorted and cause the motor to either be off or full speed?

 

Good afternoon dear Sirs,
i need your opinions...

I'm trying to repair a MCS2100-ELS circuit board.
At the begging i found that the IGBT (Q6) G4PC40K was short circuited. Also the SCR (Q3) S8025L was damaged. The other components seemed to be ok.
i have replaced the 2 damaged components and i supplied the pcb wit 230v at (AC Neut - AC Hot) LG2.
Everything seemed to be Ok. I had 11,5V at LG5 and measuring +5V at HD5 (without the motor connected to the PCB)
The LD1 was always on, nevertheless every 55 seconds it bllinks on time and then returned to be on for more 55 sec.

A few moments ago, i supplied the pcb the same way but the LD1 doesn't turns on. The LD1 just turn on (for about 18 seconds) when i disconnect the power supply (230V). (At LG5 i still have 11,5V and +5VDC ate HD5).
I don't know what happened for this is occurring but i checked some self at the wall socket when i plug the jack for 230V.

Should be something in short circuit? Could the controller be damaged?

Thank you very much in advance.

Hi Denis, could you get it fixed?