Bowflex TC5300 Service Manual page 40

elecTrical and mechanical TroubleshooTing guide
Condition/Problem
Belts stop turning and "err
LS" or "err oS" is displayed

Things to Check
Virtual pivot.
Treadle alignment
Calibration
Speed sensor
I/O cables
Solution
Access the virtual pivot by removing
the rear step plastic and rear step. The
virtual pivot will be under the rear roller
and has 2 brackets (one on each treadle,
which rolls on 4 cam followers (large
bearings). Make sure all 4 brackets are
rolling (turning) as the treadles pivot. If
knocking/squeaking is coming from the
virtual pivot or if any of the 4 cam
followers are not rolling the virtual pivot
(also referred to as "Bearing Roller Kit")
should be replaced.
If treadles are not centered between the
uprights and are contacting one of the
uprights check if treadles are parallel.
If not adjust virtual pivot. If treadles
are parallel but are still contacting
an upright entire machine must be
replaced.
Re-calibrate machine. (See Calibration
Procedures, appendix 3)
1. Cycle power off and on
2. Put the machine in calibration mode
(see Calibration procedures, appendix 3)
but do not start the calibration routine.
3. Remove right rear base plastic cover
to allow access to LED board. Caution:
Machine is on.
CAuTIoN: Current is active!!
4. Locate LED D on the motor controller
board. LED may be lit or unlit.
5. Manually advance the treadle with
your foot, and check if LED D is blinking.
6. If LED D is not blinking, then the speed
sensor is not supplying a signal. Check
that the speed sensor is connected
securely to P1 on the motor controller. If
sensor is connected and LED D still does
not flash replace sensor.
If LED D is flashing when the belts are
turning but err LS or OS persists check
connections and for signs of visible
damage to any of the three I/O calbes.
If no visible damage check continuity
using a multi-meter. If a multi-meter is
not available replace all three cables.