Nautilus Be Strong Commerical T912, Service Manual

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SECTION 3: T912 TROUBLESHOOTING ELECTRICAL PROBLEMS
Troubleshooting Flowcharts
Use the flowcharts on the following pages to help you localize and correct electrical and electronic
problems.
Troubleshooting Flowchart: Motor Stalled / Overheated / No Signal - Error 1
Treadmill will not
elevate.
Check motor pwr
P2, P4, P7, and
position J3
connections
Connections
good?
Yes
Replace Grade
motor / wires
No
Volt present
when LED ON?
Replace main
cable #41170
Yes
No
Replace the Drive
Board.
Is a
“Err Grd1"
present?
Yes
No
Enter Service
mode for Grade
check, move grade
up/dwn and
examine Grade
LEDs on hood.
Measure volt at P2
to P7 or P4 to P7
for LINE VOLT
End
Other Err Code
displayed?
Yes
No
Do Nothing,
Thermal Protection
Switch was active
Go to appropriate
chart
LEDs indicate
correctly?
No
Yes
Grade motor
work?
Yes
No
Motor Stalled / Overheated / No Signal
ERROR 1
End
Note if after cycling power
the error disappears during
Grade movement changes,
assume excess movements
caused thermal overload.
Note prior to replacing motor,
check for frozen drive "Nut" to the
drive shaft.
"Stalled Condition"