Precor C764 Stepper - Page 7 - Answered Questions & Fixed issues

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

Try lubricating between the deck and belt. This video will show you how to do this procedure.

I would swap the wheels and see if the noise switches to the left side. This is a common sound from a bad wheel bearing. Wheel Original Style Precor Gray PPP000000050578101 SPORTSMITH net

Lift motor is bad and needs to be replaced

The tuner inside the unit has most likely gone bad. I've seen a lot of these units do this in the last year or so. Precor use to refurbish these on site but they discontinued the program. If a tuner goes bad in one of these they want you to replace the whole viewing system now

you must replace the control board electronic.Go to www.treadmilldoctor.com and get it see the diagram how the control board control almost the 80% of the machine.God bless you

Step 1:

1)First lube the deck belt+rollers bearing see the video and proceed

Step 2:

2) if the problem persistTime to replace the old board deck belt

Step 3:

3) You must tesst the maim motor bearing+ drive beltsee my personal TIPS for motor helps, and replace if necessary or repair.God bless you

try to tight the RIbbon CAble inside for keypads, and tight the upper cable vs lower cable.2) Adjust the REED swtich, test it, clean it, see the diagram, and tight very well the plug-God bless you

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 TIPSGod bless you

Thank you brother.That causes can be 1) optical infrared speed sensor is obstructed.2) drive motor brusher are bad.3) speed sensor position is incorrect4) speed sensor potentiometer adjustment is incorrect5) speed sensor is faulty.6) lower PCA is bad7) lower PCA to upper PCA interconnect cable is bad8) upper PCA is badRemedies: vacuum the drive motor pay attention to speed sensor .b) motor brusher do not make suffciente contact repairc) adjust the speed sensor see the scheme attached.d) locate the speed sensor potentiomente on the lower PCA.set the potentiometer in mid-rangee)measure voltage D.C. for 5vdc, two fo the leads will toggle between 0vdc-5 Vdc.as you rote the speed sensor.f) substitute a known good lower PCS for determine g) substitute a known good interconnect cable h) substitute a known good upper PCA for determine if is faulty. God bless yousee the block diagram and my personal TIPS for motor in treadmills

I have a ProLife treadmill with a breaker on it, the fuse may have blown it. You may try that, It would be next to the switch by the front of the the power cord. The front on the pic of this website, near the left bottom of cord or switch.

It is the aluminum rollers they used in manufacturing. Precor will replace the rollers with steel and the belt for labor only (it was about $80 for me in Idaho) It has worked like a champ since.

Der Sir;The power switch is failure , you must Change the switch. You must be shure the some wires is Not loose, otherwise the wires will be touching the carcase causing the spark inside. Retight the wires or solder .You must inspect the main motor board and all the element around . If someone is burned or other wires is touching the carcasing producing the spaprk.sincerely. God bless you.ernesto cuadramanagua, nicaragua c.a.

Hi Jim:You directed this question at me, but unfortunately this isn't my expertise and I am unable to provide you with a real solution at this time. Hopefully one of other experts will be able to provide you with a real solution. Thank you for using FixYa.

Call me 574 272-0509 I am a Precor teck

In looking at the parts list for the Precor 9.20s on fitnessrepairparts.com it looks the rear roller for the machine is currently available although it is not cheap. Doesn't look like treadmilldoctor.com has one.

The belt is erratic ,This indicates problem with DC board or the motor. Manually push the belt in the direction in which it normally moves. If you have difficulty turning the belt, there may be an issue with the belt/deck friction. If the belt turns freely, there may be an issue with the DC board output.
Use a multimeter to test the black and red lead wires that connect the motor to the power supply. An external power cord connects the motor the power supply.
Most probably its a motor issue.Its got weak,because in most of the cases its seen.But in some cases the board is checked faulty.-------- Get the motor as well as board checked to confirm the fault. This will help.Thanks.Helpmech.

I'm inclined to think that a tooth could be broken on a gear or flywheel, if equipped. Of course, you would have to partially disassemble it to check or replace it. It could also be a bad rear roller, or bad spot in the belt, and any worn part associated with the rear roller. Take the unit apart to try and identify the bad component, and hopefully you will spot something obvious.
Here's a site that has some parts:
http://www.fitnessrepairparts.com/equipment/Select/4829/Precor/9.1-45
Good luck, and hope this helps.

Error 54 - Target Pulses Lost During Operation... Description... This error is associated with the 5.17 EFX. This error indicates that at some time after the initial start up sequence was successfully completed, the gear motor was instructed to move and no response was seen from the motors revolution sensor. Possible Causes (1.) The F2 fuse is blown.... (2.) Damaged or Intermittent gear motor wiring.... (3.) Bad gear motor.... (4.) Damaged gear motor target... (5.) Bad lower PCA.... Possible Remedies.... (1.) Remove power from the 5.17. Remove the F2 fuse from the lower PCA. Measure the fuse with an ohmmeter. The fuse should measure 1 ohm or less. If the reading is significantly high, replace the fuse. If the F2 fuse was blown there may have been a reason that will cause the fuse to blow again such as; damaged gear motor wiring or a bad gear motor..... (2.) Carefully inspect the gear motor wiring for intermittent or damaged wiring or connections. Replace or repair the wiring or connections as appropriate..... (3.) With power removed from the 5.17, remove both wires from the gear motor. Measure the gear motor resistance with an ohmmeter, it should read approximately 9 ohms. If the reading is significantly low or significantly high, replace the gear motor..... (4.) Visually inspect the gear motor target, if it is ripped, torn or badly scratched, replace the target..... (5.) Measure the voltage at the gear motor during the start up sequence, it should measure approximately 12 V.D.C. The voltage would only be present between the time the sequence was initiated and an error was displayed.. If the voltage is significantly low or absent and the F2 fuse is good (see step 1), replace the lower PCA......
Hope this has helped you.... Thanks...

Call Precor @ 1-800-347-4404 they should sell you directly