Resistance Issues
Applies To
All Spinner Series Bikes
Issue
Increasing the resistance knob does not apply typical or no increased resistance to the fly-
wheel.
Cause
l
The brake pad-flywheel gap is out of specification.
l
Damaged brake pads.
l
The resistance knob shaft mechanism has failed and is not adjusting the caliper brake
pad arms.
l
Caliper strain gauge cable has either disconnected or is bad.
l
LPCA
1
failure.
l
Caliper strain gauge has failed.
Solution
Verify that the resistance knob shaft is varying the caliper brake pad-flywheel distance as
the resistance is varied from minimum resistance to maximum distance.
l
If not, verify the resistance knob and shaft operation, see "Resistance Knob Replace-
ment" on page129.
Increase the resistance to maximum and make sure the brake pad-flywheel gap is within
spec, see "Brake Pad Adjustment" on page23.
Inspect the brake pads for physical damage. Replace if damaged, see "Brake Pad Replace-
ment" on page52.
Verify that the console is reading torque. While pedaling, access the console service menu,
select the Torque
2
parameter and verify that the torque varies with change in resistance
level.
1
Lower Printed Circuit Assembly board; also refered to as the Lower PCA or simply as the
lower board. On treadmills, it is the console to base function interface and the motor con-
troller unit (MCU). On self-powered units, it is the lower PCA console to base function inter-
face.
2
Torque is a measure of the force that can cause an object to rotate about an axis. Bolt/nut
example: 5 NM torque is equivalent to 5 newton's of force applied one meter from the center
of the bolt, 6 ft-lb is equivalent to 6 lbs of force applied 1 foot away from the center of the
bolt.
Contact Precor Customer Support at support@precor.com or 800.786.8404 with
any questions.
Page 160
6 Troubleshooting
System Troubleshooting Procedures
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