53
Nautilus® Commercial T9 Series Treadmill Service Manual
Common Electrical and Electronic Problems
The following tables provide possible causes and solutions to the most common types of electrical and
electronic problems. While the information in these tables may not resolve all problems, they should help
you isolate the area affected by the problem.
Table 4–1. Electrical Issues
Problem
Possible Causes
Remedy
There is no display.
Circuit breaker on the treadmill
hood is off.
• Set the treadmill circuit breaker to
ON
.
Treadmill power cord is not
plugged in.
• Plug in the power cord, then set the
treadmill circuit breaker to
ON
.
There is no power at the wall
outlet.
• Check the building circuit breaker.
There is an internal electrical
problem.
• Refer to the wiring schematics
located in this section of the
manual.
There is a blown fuse
• Replace F1, F3, or F4 on the
Configuration Plate assembly.
Circuit breaker trips during normal
operation.
There is a power fault.
• Inspect walk belt for wear.
There is an insufficient power
source.
• Make sure the outlet voltage
is 115VAC (USA) or 230VAC
(International) + or - 10%.
The treadmill is not on its own
dedicated circuit.
• Plug the treadmill into its own 20-
amp dedicated electrical outlet.
Treadmill will not change grade.
Fuse is blown.
• Replace blown fuse F2 on the
Configuration Plate assembly.
There is an internal problem.
• Cycle the circuit breaker switch on
the treadmill.
• Replace the grade actuator motor.
Grade actuator motor runs, but
grade never changes.
Grade actuator motor is bad.
• Replace the grade actuator motor.
Table 4–2. Electronic Issues
Problem
Possible Causes
Remedy
TM COM ERROR appears on the
display at power-up.
Main cable is possibly crimped.
• Replace the main cable.
Upper display board is bad.
• Replace the console.
Treadmill will not change grade.
VSD board is bad.
• Replace the VSD.
Old firmware is installed.
• Upgrade the firmware.
Treadmill will not reach maximum
speed.
Speed limit control may be
activated
• Refer to Part 2 for adjusting
treadmill maximum speed.
Treadmill will not reach maximum
time.
Time limit control may be activated.
• Refer to Part 2 for adjusting
treadmill maximum time.
SECTION 4: T914/916 TROUBLESHOOTING ELECTRICAL PROBLEMS
Summary of Contents for Be Strong Commerical T912
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