008 Sears CA Treadmill Service Manual [rev 1.0] |
Section Three |
Troubleshooting
Treadmill Troubleshooting
>>
Failed Auto Calibration | 30727 Only
Symptom
Possible Cause
Test Procedure
Repair
Failed Auto Calibration
– Belt runs for a few
seconds and then stops
and E1 message on
console.
Failed RPM sensor.
-Put machine into Eng1
(Reference p26) and
check for slight
fluctuation of speed in
speed window of
display. (Speed should
not fluctuate more than
a few hundredths.)
Replace RPM sensor.
RPM sensor misaligned. -Adjust sensor bracket
to correct position.
Magnet missing in front
roller pulley.
Replace magnet.
Failed console cable
.
-Check voltage and
continuity of console
cable. Reference p22.
Replace console cable
.
Failed Auto Calibration
– Belt never runs and E1
message on console.
See troubleshooting for
no motor movement.
Reference p40.
Failed Auto
Calibration – Board
never sets speeds. Belt
will
continue to run and not
stop.
RPM sensor not aligned
properly or has failed.
- Verify positioning of
sensor wire. (Wire
coming from RPM
sensor points toward the
front of the unit, sensor
is as close as possible to
the magnet in the pulley
without touching, and
the sensor bracket
90-degree angle, not
bent in any way.)
- Put machine into Eng1
(Reference p26) and
check for slight
fluctuation of speed in
speed window of
display. (Speed should
not fluctuate more than
a few hundredths.)
Replace RPM sensor.
Failed motor control
board (MCB).
Replace MCB.
