Fuse is a dead end in this case. Is there belt movement with the LS error, where the belt moves for a few seconds then quits? If so, there may be a problem with the upper - contact Precor and have them look up bulletins on that model/SN. If no belt movement, then there is a problem with either motor or MCB, probably MCB.
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Precor Error LS, Speed Sensor Signal Missing
Probable Cause
1. Intermittent or open connection of the speed sensor (reed switch) wiring.
2. Reed switch is defective or has intermittent connection.
3. Drive motor brushes are bad.
4. Lower PCA is bad.
Corrective Action
Inspect the speed sensor (reed switch) wiring for damage or poor connection to the lower PCA. Replace damaged wiring or reset connection as necessary.
Using an ohm meter, test the reed switch while rotating the drive pulley. The reed switch will close when the magnet passes in front of it.
Inspect the drive motor brushes and replace if necessary.
Test unit with a known good lower PCA. Replace lower PCA if necessary.
Precor Error LS, Speed Sensor Signal Missing
Probable Cause
1. Intermittent or open connection of the speed sensor (reed switch) wiring.
2. Reed switch is defective or has intermittent connection.
3. Drive motor brushes are bad.
4. Lower PCA is bad.
Corrective Action
Inspect the speed sensor (reed switch) wiring for damage or poor connection to the lower PCA. Replace damaged wiring or reset connection as necessary.
Using an ohm meter, test the reed switch while rotating the drive pulley. The reed switch will close when the magnet passes in front of it.
Inspect the drive motor brushes and replace if necessary.
Test unit with a known good lower PCA. Replace lower PCA if necessary.
Precor Error Code 26
Error Code: 26
Manufacturer: Precor
Model: All Models
Error Description:
Error 26, Motor Pulse Width Incorrect - Observation of the speed sensor signal and verification the signal from the speed sensor is appropriate for the requested speed. If an incorrect or erratic speed sensor signal is detected the error appears.
Possible Reason:
The line of sight between the speed sensor and the speed sensor target is obstructed.
Incorrect gap between the speed sensor and the speed sensor target.
Incorrect adjustment of the speed sensor potentiometer (when equipped).
Damaged speed sensor target.
Recommended Action:
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.
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".
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.
Inspect the speed sensor target for any scratches or tears that could cause incorrect readings. Replace the speed sensor target if
Precor Error LS, Speed Sensor Signal Missing
Probable Cause
1. Intermittent or open connection of the speed sensor (reed switch) wiring.
2. Reed switch is defective or has intermittent connection.
3. Drive motor brushes are bad.
4. Lower PCA is bad.
Corrective Action
Inspect the speed sensor (reed switch) wiring for damage or poor connection to the lower PCA. Replace damaged wiring or reset connection as necessary.
Using an ohm meter, test the reed switch while rotating the drive pulley. The reed switch will close when the magnet passes in front of it.
Inspect the drive motor brushes and replace if necessary.
Test unit with a known good lower PCA. Replace lower PCA if necessary.
Precor Error Code 26
Error Code: 26
Manufacturer: Precor
Model: All Models
Error Description:
Error 26, Motor Pulse Width Incorrect - Observation of the speed sensor signal and verification the signal from the speed sensor is appropriate for the requested speed. If an incorrect or erratic speed sensor signal is detected the error appears.
Possible Reason:
The line of sight between the speed sensor and the speed sensor target is obstructed.
Incorrect gap between the speed sensor and the speed sensor target.
Incorrect adjustment of the speed sensor potentiometer (when equipped).
Damaged speed sensor target.
Recommended Action:
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.
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".
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.
Inspect the speed sensor target for any scratches or tears that could cause incorrect readings. Replace the speed sensor target if necessary.
Precor Error Code 26
Error Code: 26
Manufacturer: Precor
Model: All Models
Error Description:
Error 26, Motor Pulse Width Incorrect - Observation of the speed sensor signal and verification the signal from the speed sensor is appropriate for the requested speed. If an incorrect or erratic speed sensor signal is detected the error appears.
Possible Reason:
The line of sight between the speed sensor and the speed sensor target is obstructed.
Incorrect gap between the speed sensor and the speed sensor target.
Incorrect adjustment of the speed sensor potentiometer (when equipped).
Damaged speed sensor target.
Recommended Action:
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.
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".
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.
Inspect the speed sensor target for any scratches or tears that could cause incorrect readings. Replace the speed sensor target if necessary.
Precor Error Code 26
Error Code: 26
Manufacturer: Precor
Model: All Models
Error Description:
Error 26, Motor Pulse Width Incorrect - Observation of the speed sensor signal and verification the signal from the speed sensor is appropriate for the requested speed. If an incorrect or erratic speed sensor signal is detected the error appears.
Possible Reason:
The line of sight between the speed sensor and the speed sensor target is obstructed.
Incorrect gap between the speed sensor and the speed sensor target.
Incorrect adjustment of the speed sensor potentiometer (when equipped).
Damaged speed sensor target.
Recommended Action:
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.
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".
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.
Inspect the speed sensor target for any scratches or tears that could cause incorrect readings. Replace the speed sensor target if necessary.
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:
The line of sight between the speed sensor and the speed sensor target is obstructed.
Badly worn drive motor brushes.
Incorrect gap between the speed sensor and the speed sensor target.
Incorrect adjustment of the speed sensor potentiometer (when equipped).
Inoperative speed sensor.
Faulty lower PCA.
Faulty interconnect cable between upper and lower PCA.
Faulty upper PCA.
Recommended Action:
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.
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.
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".
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.
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.
Determine if the lower PCA is bad by swapping with a known good lower PCA.
Determine if the interconnect cable is bad by swapping with a know good cable.
Determine if the upper PCA is bad by swapping with a know good upper PCA.
Precor Error LS, Speed Sensor Signal Missing
Probable Cause
1. Intermittent or open connection of the speed sensor (reed switch) wiring.
2. Reed switch is defective or has intermittent connection.
3. Drive motor brushes are bad.
4. Lower PCA is bad.
Corrective Action
Inspect the speed sensor (reed switch) wiring for damage or poor connection to the lower PCA. Replace damaged wiring or reset connection as necessary.
Using an ohm meter, test the reed switch while rotating the drive pulley. The reed switch will close when the magnet passes in front of it.
Inspect the drive motor brushes and replace if necessary.
Test unit with a known good lower PCA. Replace lower PCA if nec
Precor Error Code 26
Error Code: 26
Manufacturer: Precor
Model: All Models
Error Description:
Error 26, Motor Pulse Width Incorrect - Observation of the speed sensor signal and verification the signal from the speed sensor is appropriate for the requested speed. If an incorrect or erratic speed sensor signal is detected the error appears.
Possible Reason:
The line of sight between the speed sensor and the speed sensor target is obstructed.
Incorrect gap between the speed sensor and the speed sensor target.
Incorrect adjustment of the speed sensor potentiometer (when equipped).
Damaged speed sensor target.
Recommended Action:
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.
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".
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.
Inspect the speed sensor target for any scratches or tears that could cause incorrect readings. Replace the speed sensor target if necessary.
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