20 Most Recent Precor C966i Treadmill C 966i Questions & Answers

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We only get a STOP KEY and it will not run

c966 have Precor transported from one place to another place is not rash to give any signal in transcri could you help
4/23/2016 11:01:09 AM • Precor C966i... • Answered on Apr 23, 2016
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Fixing error 22 on precor 9.33 treadmill

Precor Error Code 22 Error Code: 22 Manufacturer: Precor Model: All Models Error Description: Error 22, No Motor Pulses at Start Up - Error indicates that the display has sent a command for the drive motor to start, however, the speed sensor has not returned the signal acknowledging that the drive motor has started. Possible Reason:
  1. The line of sight between the speed sensor and the speed sensor target is obstructed.
  2. Badly worn drive motor brushes.
  3. Incorrect gap between the speed sensor and the speed sensor target.
  4. Incorrect adjustment of the speed sensor potentiometer (when equipped).
  5. Inoperative speed sensor.
  6. Faulty lower PCA.
  7. Faulty interconnect cable between upper and lower PCA.
  8. Faulty upper PCA.
Recommended Action:
  1. Using a static safe vacuum cleaner, carefully vacuum out the drive motor compartment. Be sure to thoroughly clean the area between the speed sensor and the speed sensor target.
  2. Bady worn drive motor brushes cannot make proper contact with the motor commutator, therefore the drive motor will not start when voltage is applied. Inspect and replace drive motor brushes if necessary.
  3. Inspect the gap of the speed sensor to the speed sensor target. Proper gap is 3/16" and the speed sensor photo eye should be aimed at the larger portion of the targets wedge shaped section. If unit has a magnetic speed sensor, the gap between the end of the sensor and the flywheel tooth needs to be 3/16".
  4. Locate the speed sensor potentiometer (when equipped) on the lower PCA. Set the speed sensor potentiometer to mid-range. Start the treadmill and increase speed to 6 mph. Carefully adjust the speed sensor potentiometer until the treadmill is operating the smoothest. Increase the speed to full speed and again adjust the speed sensor potentiometer until the treadmill is operating the smoothest. These two adjustments are typically small and are generally only a matter of fine tuning.
  5. An inoperative speed sensor will allow the drive motor to start and run briefly before the error appears. If able to access the speed sensor wiring, measure the DC voltage between the speed sensor leads. Two of the leads will always read about 5 VDC. Two will toggle between 0 and 5 VDC as you slowly turn the speed sensor target. If both measurements are not seen, the speed sensor needs replaced. Some units have the speed sensor mounted on the lower PCA and the lower PCA needs replaced.
  6. Determine if the lower PCA is bad by swapping with a known good lower PCA.
  7. Determine if the interconnect cable is bad by swapping with a know good cable.
  8. Determine if the upper PCA is bad by swapping with a know good upper PCA.
Precor Error Code 22
9/29/2014 9:39:29 PM • Precor C966i... • Answered on Sep 29, 2014
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Precor c956 has error 22

Precor Error Code 22 Error Code: 22 Manufacturer: Precor Model: All Models Error Description: Error 22, No Motor Pulses at Start Up - Error indicates that the display has sent a command for the drive motor to start, however, the speed sensor has not returned the signal acknowledging that the drive motor has started. Possible Reason:
  1. The line of sight between the speed sensor and the speed sensor target is obstructed.
  2. Badly worn drive motor brushes.
  3. Incorrect gap between the speed sensor and the speed sensor target.
  4. Incorrect adjustment of the speed sensor potentiometer (when equipped).
  5. Inoperative speed sensor.
  6. Faulty lower PCA.
  7. Faulty interconnect cable between upper and lower PCA.
  8. Faulty upper PCA.
Recommended Action:
  1. Using a static safe vacuum cleaner, carefully vacuum out the drive motor compartment. Be sure to thoroughly clean the area between the speed sensor and the speed sensor target.
  2. Bady worn drive motor brushes cannot make proper contact with the motor commutator, therefore the drive motor will not start when voltage is applied. Inspect and replace drive motor brushes if necessary.
  3. Inspect the gap of the speed sensor to the speed sensor target. Proper gap is 3/16" and the speed sensor photo eye should be aimed at the larger portion of the targets wedge shaped section. If unit has a magnetic speed sensor, the gap between the end of the sensor and the flywheel tooth needs to be 3/16".
  4. Locate the speed sensor potentiometer (when equipped) on the lower PCA. Set the speed sensor potentiometer to mid-range. Start the treadmill and increase speed to 6 mph. Carefully adjust the speed sensor potentiometer until the treadmill is operating the smoothest. Increase the speed to full speed and again adjust the speed sensor potentiometer until the treadmill is operating the smoothest. These two adjustments are typically small and are generally only a matter of fine tuning.
  5. An inoperative speed sensor will allow the drive motor to start and run briefly before the error appears. If able to access the speed sensor wiring, measure the DC voltage between the speed sensor leads. Two of the leads will always read about 5 VDC. Two will toggle between 0 and 5 VDC as you slowly turn the speed sensor target. If both measurements are not seen, the speed sensor needs replaced. Some units have the speed sensor mounted on the lower PCA and the lower PCA needs replaced.
  6. Determine if the lower PCA is bad by swapping with a known good lower PCA.
  7. Determine if the interconnect cable is bad by swapping with a know good cable.
  8. Determine if the upper PCA is bad by swapping with a know good upper PCA.
Precor Error Code 22
8/7/2014 4:44:51 PM • Precor C966i... • Answered on Aug 07, 2014
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Precor error 15 input voltage

Precor Error 15, AC Input Voltage Too High Probable Cause 1. AC input voltage is incorrect. 2. AC input voltage transients. Transients can be caused by lightning strikes or by other pieces of equipment sharing the unit's AC power. Corrective Action
  1. Verify AC feed into the building's circuit breaker is correct and connected to the proper transformer tap.
  2. Ensure the AC grounding for the unit's outlet is good and verify the unit is connected to an isolated and dedicated 20 amp circuit.
Precor Error Code 15
8/7/2014 4:43:53 PM • Precor C966i... • Answered on Aug 07, 2014
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What is error 28

Precor Error 28, Temperature Too High Probable Cause 1. The lower PCA cooling fan is clogged. 2. The lower PCA cooling fan is inoperative. 3. The running belt and/or deck are badly worn. 4. The lower PCA is bad. 5. Drive motor is shorted or de-magnetized causing a high power demand. Corrective Action
  1. Inspect the fan mounted on the lower PCA for dust/debris buildup. Clean if necessary, ensuring the fan spins freely. Some lower PCA's do not have a cooling fan and others may have the fan mounted on the underside of the lower PCA making it not as visible.
  2. The fan was free of dust or debris but does not spin. Make sure that the fan wiring is secure and properly connected to the lower PCA. If no obstruction to the fan and the wiring is good but fan still doesn't turn, replace the lower PCA.
  3. Check the amp draw using a clamp on AC volt-amp meter during loaded and no load conditions; compare the 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.
  4. Test unit with a known good lower PCA. Replace lower PCA if necessary.
  5. Test unit with a known good drive motor. Replace drive motor if necessary.
Precor Error Code 28
8/6/2014 7:06:01 PM • Precor C966i... • Answered on Aug 06, 2014
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Precor c966i 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
6/25/2014 4:45:09 PM • Precor C966i... • Answered on Jun 25, 2014
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Speed sensor of DC Motor treadmill making noise.

the speed sensor NOT make noise, is the main motor see the diagram attached.However tight any connector or plug very well, and test the s. sensor for open or defective and replace. You can RUN the software calibration for easy diagnose, troubleshooting, and fix it.You must test the input voltage motor, if there are the motor need repair, bearing, shaft, or winding defective.God bless you11_28_2012_4_49_43_pm.gif
3/18/2013 10:43:10 AM • Precor C966i... • Answered on Mar 18, 2013
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Error 32

LUBE OR wax you deck belt, this happen for autoprotection electronic system. To due a lack of LUBE maintenance schedule.Do it right now according with owner manual.2)lube THE rollers bearings too use WD-40 for the bearings only3) Test the drive belt motor, for cracking or worn belt, replace or adjust in according.4) Test the motor voltage input, if there are the motor need repair, see my personal TIPS for troubleshooting.5) Test the output voltage board, for input voltage motor, if there are NOT the board is faulty.God bless you
3/18/2013 10:41:27 AM • Precor C966i... • Answered on Mar 18, 2013
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The belt on my Precor

Error 22 means the drive motor is diconnected. you will hear the fan and other parts make noise but check the red and black anderson connection between the main circuit board and motor.
3/18/2013 10:32:36 AM • Precor C966i... • Answered on Mar 18, 2013
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Precor C966i The unit turns off at random intervals. When reset it comes back on then shuts off a few minutes later. Error log is empty so not an error with software.

LUBE or wax the deck belt, this happen because you do not lube or wax your equipmente according with the schedule maintenance, you must do it, every week. Do it now.use 100% silicone lube-2) LUBE the rollers bearing too use WD-40 for rollers b only.3) Test the drive belt motor, and adjust it or replace4) test the input voltage motor, if there are the motor need repair.see my personal TIPS for troubleshooting helps.5) test the output voltage board, for input voltage motor, if there are NOT the board is faulty. see the block diagramGod bless you11_29_2012_5_38_19_pm.gif
11/29/2012 5:38:22 PM • Precor C966i... • Answered on Nov 29, 2012
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Precor 9.25i treadmill will not turn on at on/off switch. It throws a spark then immediatly turns off

With a few more details I am sure we will be able to work through is issue together and get you back into your exercise program shortly. If you would please give us a call at 1-800-347-4404, one of our technicians will be more than happy to assist you. Please give us a call at 1-800-347-4404 Mon-Fri 6AM-5PM, except Thur 6AM to 3PM, Pacific time. - Precor Customer Support Team
2/29/2012 8:27:08 PM • Precor C966i... • Answered on Feb 29, 2012
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Buttons stuck

Dear Sir:

I will help you , inmediately.

This problem is normally by the use. Go to radio Schak , and buy some Spray for to clean and lubricate electronic parts, contacts, buttons , or Spray for clean to pressure.


This will be fix it this problem.

Thank you in advance,sincerely. God bless you.

If you need further assistance please reach me.

E.CUADRA
MANAGUA, NICARAGUA. C.A.
10/15/2011 1:56:28 AM • Precor C966i... • Answered on Oct 15, 2011
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Precor EFX 556 cross trainer slow startup

Il existe deux raisons pour lesquelles votre v?lo elliptique Precor EFX 556 d?marre lentement. Tout d'abord, un probl?me ?lectrique, tel qu'un cordon d'alimentation mal branch? ou endommag?, ou m?me une prise d?fectueuse, pourrait survivre. Un condensateur d?fectueux ? l'int?rieur de l'appareil, qui peut causer des retards au moment de la mise sous tension, est une autre explication. Pour r?soudre ces probl?mes, commencez par v?rifier les connexions ?lectriques. Envisagez d'appeler un technicien qualifi? pour diagnostiquer et r?soudre un probl?me ?lectrique ou ?lectronique si le probl?me persiste.
10/30/2023 9:03:49 PM • Precor Exercise... • Answered on Oct 30, 2023
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My precor efx556 does not detect pedaling, how can i fix it?

hello there, check if the lift control system is detected the lift is moving in the opposite direction of the issued lift command. This error would happen when the lift was already in motion (typically downward) when a lift command in the opposite direction (lift upward) was issued.
9/5/2023 10:39:57 PM • Precor Exercise... • Answered on Sep 05, 2023
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What causes a slow boot up on a Precor EFX 546?

A slow boot up on a Precor EFX 546 elliptical machine can be caused by several factors, including:
  1. Low battery voltage: If the battery voltage is low, the machine may take longer to boot up. This can be due to a weak or old battery, or a problem with the battery charger.
  2. Dirty or corroded contacts: Dirt, dust, or corrosion on the battery contacts or other electrical contacts can interfere with the machine's ability to start up quickly.
  3. Faulty console or display board: If the console or display board is malfunctioning, it may take longer for the machine to boot up or may not boot up at all.
  4. Loose or damaged cables or connections: Loose or damaged cables or connections can prevent the machine from starting up properly and may cause a slow boot up.
  5. Outdated software: If the software on the machine is outdated, it may take longer for the machine to boot up or it may not start up at all.
To troubleshoot a slow boot up on a Precor EFX 546, you can try the following steps:
  1. Check the battery voltage and replace the battery if necessary.
  2. Clean the contacts on the battery and other electrical components.
  3. Inspect the cables and connections for damage or looseness.
  4. Check for any error codes or messages on the console or display board and consult the user manual for troubleshooting steps.
  5. Check for any available software updates and install them if necessary.
If none of these steps resolve the issue, you may need to contact a professional technician for further assistance.
2/27/2023 11:23:59 PM • Precor Exercise... • Answered on Feb 27, 2023
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