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James Wright Posted on Nov 15, 2012
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Precor 933i belt error

Treadmill started getting belt errors a couple of days ago. Everything I read online said it was friction of the belt and deck. Flipped the deck today and started the treadmill. I was checking the belt alignment at approx 7 mph when the treadmill stopped. Now every time I try to start it I get the belt error. I removed the drive belt from the motor and reset the error codes (20,22). Still get errors. I can see 150VDC for a couple of secs when I disconnect the motor lead and measure it. Please tell me the motor isn't fried...

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ernesto cuadra

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  • Precor Master 12,223 Answers
  • Posted on Nov 15, 2012
ernesto cuadra
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Please read my personal TIPS for treadmills and test it.
However LUBE inmediately the deck belt, this happen because the lack of maintenance by 5 hours aprox, So the system protect itself for electronic system and shut down.
2) LUBE the rollers bearing too.
3) Test the main motor bearint, measure the input voltage motor, if there are the motor is faulty. Repair. see my personal TIPS
God bless you

2 Related Answers

maxtreadmill

John Mazmanian

  • 832 Answers
  • Posted on Mar 13, 2010

SOURCE: My treadmill belt just stopped, message error E

Unplug your unit, then remove motor shroud have a good light the sensor is either mounted on the frame by the front roller/pulley unit or it is mount on the motor sometimes by the flywheel sometimes on the opposite end. Next step is to locate the motor control board and plug you uit in. Your board should ligt up with red ,green, or amber L E Ds now manually move the running belt and you should see one of those lights flicker or not if it does then the sensor is working , then we other issues, if not either we have a defective or misalign sensor. An if your unit needs lubrication use a synthetic silcone product.

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Anonymous

  • 1196 Answers
  • Posted on Sep 04, 2011

SOURCE: my tunturi T 20 gets

Hi,

I will advice you try re-calibrate your treadmill, follow the procedure below to re-calibrate it,

Step 1 Stand on the side rails of the treadmill for safety purposes. Remove the safety key. Step 2 Press and hold the two incline buttons. The incline buttons are blue and on the left side of the display. Hold the up and down button simultaneously. Release the buttons when the display reads "Calibration."
Step 3 Press the green start button located either above or below the large, red stop button (depending on your model). Stay on the side rails as the treadmill belt begins to move. Both the speed and incline should go through their full range from lowest to highest, and then back down again.
Step 4 Repeat the process if the display does not read "Calibration Successful." Contact the business where you purchased your treadmill if repeating the calibration process does not result in a successful calibration.

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Related Questions:

0helpful
1answer

Precor 933i where are fuses

Remove the the black and red wire from the Motor control board, get a drill battery and touch the wires to the positive and negative. If the belt moves, then I would say to replace the MCB.
0helpful
1answer

Error 27

Precor Error 27, Too Much Drive Motor Current Probable Cause 1. The running belt and/or deck are badly worn.
2. Drive motor is shorted or de-magnetized causing a high power demand.
Corrective Action
  1. Check the amp draw using a clamp on AC volt-amp meter during loaded and no load conditions and compare values to a similar treadmill that is known to have a good running belt and deck. Replace the belt and/or deck if necessary. Don't forget, some units have a double sided deck which means it may be flipped over rather than replaced if it has an unused side.
  2. Test unit with a known good drive motor. Replace drive motor if necessary.
Precor Error Code 27
0helpful
1answer

Precor Treadmill C956 error 21

Precor Error Code 21 Error Code: 21 Manufacturer: Precor
Model: All Models
Error Description: Error 21, Too many Consecutive Power Requests- The error 21 observes a treadmill's power bit reading when the treadmill was operating at speeds above 1 mph. Power bits indicate the relative time that the motor controller drive circuit is turned on. Power bits is an indication of the amount of power the load is demanding from the motor controller. Error 21 indicates that at a speed greater than 1 mph, an excessive amount of power is being demanded from the motor controller. Possible Reason:
  1. A badly worn deck and/or running belt can cause the error to appear when the unit is in use.
  2. Badly worn drive motor brushes may not be making proper contact with the drive motor commutator causing the error to occur when the unit is in use. The unit may also slow down or become sluggish when the load or speed is increased.
  3. A jumper may be required on the lower PCA if installed into a 120 VAC (Version 2) treadmill.
  4. A leaky or shorted drive motor filter capacitor (on units equipped with SCR motor controller) could increase the current demand enough to cause the error.
  5. A leaky or shorted drive motor inductor (on units equipped with SCR motor controller) could increase the current demand enough to cause the error.
  6. The high power demand is caused by a shorted or de-magnetized drive motor.
Recommended Action:
  1. Determine the amount of AC input current being drawn by the unit under no load and loaded conditions using a clamp on AC ammeter. The current displayed can be used to determine the condition of the deck and/or running belt. These same readings should be taken on a like unit, in good operating condition with a know good deck and running belt. The readings from the unit in good operationg condition can be used as the benchmark. Compare readings and replace* the deck and/or running belt if necessary. *Some units have a reversible deck. Be sure if the deck is being flipped or replaced, a new belt is installed on the new deck surface.*
  2. Inspect and repalce both drive motor brushes if necessary.
  3. Inspect the lower PCA (if unit is 120 VAC/ Version 2) for jumper. If jumper is not installed, error typically appears between 7 mph & 8 mph. Install jumper if necessary. CAUTION - DO NOT install jumper if unit is 240 VAC. Installing the jumper on a 240 VAC unit will casue the lower PCA to fail.
  4. Measure the AC input current without a load using a clamp on AC ammeter. Electrically isolate the filter capacitor from the drive motor circuit. The drive motor leads need be kept intact so the drive motor will operate with the filter capacitor removed from the circuit. Re-measure the no load AC input. If the AC input current is significantly lower, replace the filter capacitor.
  5. Measure the AC input current without a load using a clamp on AC ammeter. Electrically isolate the inductor from the drive motor circuit. The drive motor leads need be kept intact so the drive motor will operate with the inductor removed from the circuit. Re-measure the no load AC input. If the AC input current is significantly lower, replace the inductor.
  6. Swap the existing drive motor with a known good drive motor.
Precor Error Code 21
0helpful
1answer

My 933i is tripping my house circuit breaker at higher speeds. I think there is more resistance in the belt (It's never been serviced).

When a running belt has excessive wear, it creates a lot of friction which causes the drive motor to work harder. When the drive motor works harder it will start overheating. If the belt is not lubricated periodically, it will ruin the deck, the drive motor, and cause other electrical problems such as tripping the breaker [after a while, the circuit breaker on the treadmill will need to be replaced.

It is suggested to lubricate the belt monthly. At this point, you may need to replace both your deck and your running belt.

With your model and serial number, you can visit our website and view the products we have available for your particular machine. -

Precor Repair Parts for 9 21s 9 21si Treadmills Consumer SPORTSMITH net



The following link will take you to our tech support page that contains some tips and videos on how to maintain your treadmill:



SPORTSMITH LLC
0helpful
1answer

Precor error 20

Precor Error Code 20 Error Code: 20 Manufacturer: Precor
Model: All Models
Error Description: Error 20, Too many Maximum Power Requests in 1 Second - The error 20 observes a treadmill's power bit reading when the treadmill was operating at speeds of 1 mph or less. Power bits indicate the relative time that the motor controller drive circuit is turned on. Power bits is an indication of the amount of power the load is demanding from the motor controller. Error 20 indicates that at a speed of 1 mile per hour or less, an excessive amount of power is being demanded from the motor controller for an excessive length of time. Possible Reason:
  1. Starting the running belt under a very heavy load can cause the error 20 to appear.
    1. The user (especially a heavier user) is standing on the running belt as they start the belt into motion.
  2. A badly worn deck and/or running belt can cause the error to appear when the user steps onto the belt.
  3. Badly worn drive motor brushes may not be making proper contact with the drive motor commutator causing the error to occur when the user steps onto the running belt. The unit may also slow down or become sluggish when the user steps onto the running belt.
  4. A leaky or shorted drive motor filter capacitor (on units equipped with SCR motor controller) could increase the current demand enough to cause the error.
  5. A leaky or shorted drive motor inductor (on units equipped with SCR motor controller) could increase the current demand enough to cause the error.
  6. The high power demand is caused by a shorted or de-magnetized drive motor.
Recommended Action:
  1. Instruct the user to straddle the running belt while starting the treadmill at a low speed, such as 1mph or less, and then step onto the running belt.
  2. Determine the amount of AC input current being drawn by the unit under no load and loaded conditions using a clamp on AC ammeter. The current displayed can be used to determine the condition of the deck and/or running belt. These same readings should be taken on a like unit, in good operating condition with a known good deck and running belt. The readings from the unit in good operationg condition can be used as the benchmark. Compare readings and replace* the deck and/or running belt if necessary. *Some units have a reversible deck. Be sure if the deck is being flipped or replaced, a new belt is installed on the new deck surface.*
  3. Inspect and repalce both drive motor brushes if necessary.
  4. Measure the AC input current without a load using a clamp on AC ammeter. Electrically isolate the filter capacitor from the drive motor circuit. The drive motor leads need be kept intact so the drive motor will operate with the filter capacitor removed from the circuit. Re-measure the no load AC input. If the AC input current is significantly lower, replace the filter capacitor.
  5. Measure the AC input current without a load using a clamp on AC ammeter. Electrically isolate the inductor from the drive motor circuit. The drive motor leads need be kept intact so the drive motor will operate with the inductor removed from the circuit. Re-measure the no load AC input. If the AC input current is significantly lower, replace the inductor.
  6. Swap the existing drive motor with a known good drive motor.
Precor Error Code 20 20 Too Many Maximum Power Request in 1 Sec
0helpful
1answer

How do I fix an ERR70 message on the display of my 9.21 treadmill.

Precor Error 70, LPCA Not Read Probable Cause Incorrect or missing software in the LPCA
Corrective Action Test with a known good LPCA Precor Error 70 LPCA Not Read AMT12 Only
4helpful
1answer

SPEED ERROR ON PRECOR 927 TREADMILL

I had the speed error on my precor 9.23. When I opened it up I found that there are two little round magnets on the belt pulley with a sensor mounted nearby. This must be how the computer know the speed of the treadmill. I noticed that there were several little metal shavings stuck to the magnets. Not sure where they came from, hopefully not another problem. However, I removed the metal shavings from the magnets and everything worked fine again. If anyone else has the speed error it might be worth a look to see if its the same problem.
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