Nautilus Be Strong Commerical T912, Service Manual

Page: 45 / 130

45
Nautilus® Commercial T9 Series Treadmill Service Manual
SECTION 3: T912 TROUBLESHOOTING ELECTRICAL PROBLEMS
Troubleshooting Flowchart: Belt Speed (Tach) Signal Loss - Error LS
Treadmill Belt
Stops
Move the walk belt
by hand such that
the front pulley's
magnet passes by
the sensor.
Does the
Speed
Movement
LED9 light?
Yes
Reposition Sensor
close to pulley
magnet
No
Replace Drive
board
Replace the
Console Board.
Is a
"Err LS"
present on
Display?
Yes
No
Check the main
cable #41170 for
open or shorts.
End
Other Err Code
displayed?
Yes
No
Rerun manual
workout.
Intermittent
connections may
have caused
condition to occur
Go to appropriate
chart
Does LS Error
still occur?
No
Yes
Does LS Error
still occur?
Yes
No
Belt Speed (Tach) Signal Loss
ERROR LS
End
Note, after cycling power the
error will disappear until the
Belt is started then 3-5
seconds with no tach signal
the system will shut down
Check integrity of
Sensor wiring /
Replace
CAUTION: DO NOT
PLACE FINGERS UNDER
BELT WHEN GRABBING
BELT TO MOVE IT!
Replace Drive
Board IF Sensor /
wiring is Okay