Precor Error Code 22, 23, 26 Motor Pulses Incorrect

Jan 08, 2022

Applies to

Consumer Treadmills, Commercial Treadmills pre-2006

 

Issue symptoms

Dust on the speed sensor, an inoperative sensor, and a failed lower PCA will cause these errors to be displayed.

• Error 22 indicates that the drive motor has been instructed to start, by either manual or program control, and the monitoring system has not received any response from the speed sensing system indicating that the drive motor has started.
• Error 23 indicates that the speed sensor signal was lost while the treadmill was in use.
• Error 26 monitors the speed sensor signal and verifies the speed sensor signal is appropriate for the requested speed. If the speed sensor signal is incorrect or erratic, an Error 26 will be displayed.

Troubleshooting steps

1. Carefully, vacuum out the drive motor compartment with a static safe vacuum cleaner.
2. Test the speed sensor at the board for a 0-5 Vdc transition when the sensor is activated by the appropriate device or actuator. The 400 Series treadmills use an optical (infrared) through speed sensor. The through sensor beam is broken by a chopper wheel attached to the motor. Dust can accumulate in the sensor. The 200 Series treadmills use a reed switch attached to the frame, actuated by a magnet installed in the drive roller pulley. Check to make sure the magnet is still installed in the pulley.
3. Switch OFF the treadmill and disconnect power from the wall receptacle. Remove and inspect the motor brushes for arcing and pitting. If present, replace both drive motor brushes. Also, check that the brush can move smoothly in the grooves, and that the spring is able to press the brushes against the commutator. Adjust or replace the brushes as necessary.
4. Substitute a known good lower PCA to determine if the lower PCA is bad.

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