True Fitness 455 Pediatric User Manual
True Fitness Service
Manual
455 Pediatric
Treadmill
True fitness technology, Inc. makes no representations or warranties regarding the
contents of this manual. We reserve the right to revise this document at any time or
to make changes to the product described within it without notice or obligation to
notify any person of such revisions or changes.
© 2004, True Fitness, Inc. All rights reserved. Printed in the United States of
America.
865 Hoff Road. O’Fallon, MO 63366. 1-800-426-6570. Fax 636-272-3026.
www.truefitness.com
Revision 9/2004
Treadmill Preventative Maintenance
Checklist
Run calibration or run a manual program and
watch and listen for anything out of the ordinary.
Perform a push off test (page T-7) to check for
proper lubrication. If excessive friction is found
and lubrication doesn’t correct the problem
perform the amp draw test (page T1-2)
Inspect the belt surfaces, topside should still have
texture for grip, bottom should be porous fabric-
not glazed, smooth or hard.
Inspect deck surface, should be free of scratches,
abrasions or blistering.
Listen for excessive bearing noise, from a
standing position, in the front and rear roller and
motor.
Check for front roller/belt slippage and belt
tension adjustment. Look for slippage on drive
pulley.
Inspect/ adjust tracking of belt.
Vacuum out motor area, being careful not to
damage PWM.
Inspect drive belt for wear and cracking.
Wipe down machine- leave it in better condition
than you found it.
True Fitness
Treadmill Service
Manual
START
Symptom guide
Calibration Procedures
Diagnostic Procedures
Test Procedures
Wiring Diagrams
Part Manuals
Page 1
Page 2
SYMPTOM GUIDE
Error Code Definitions . . . . . . . . . . . . . . . . . . . . . . . . Page 3, 4
No Belt Movement . . . . . . . . . . . . . . . . . . . . . . . . Page 5, 6
Tread Belt Stops During Workout . . . . . . . . . . . . . . . . Page 7
Heart Rate Not Working / Erratic Readings . . . . . . . . Page 8
Elevation Not Functional . . . . . . . . . . . . . . . . . . . . .. . Page 9
Speed Fluctuation: E2 Cal . . . . . . . . . . . . . . . . . . . . . . Page 10
Speed Fluctuation: S4, E5, E2
E3: EPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .
No Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 12
Circuit Breaker Trips at Start Up . . . . . . . . . . . . . .. . Page 13
Calibration Procedures . . . . . . . . . . . . . . . . . . . . . . . . Page 14
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Page 15
Page 11
Symptom Probable Cause Corrective Action Recommended Tools
ERROR
MESSAGES:
S1 L LUBE
S2 C CLEAN
S3 M MOTOR
E5 S SPEED
E1 S STALL
E1 I INCLINE
E1 R RANGE
SENSOR
Indicates that the
accumulated distance
is such that the deck
needs to be lubed
Indicates that the
accumulated distance
is such that the
machine needs to be
cleaned.
Indicates that the
accumulated time on
the treadmill is such
that the motor brushes
need to be
changed/checked.
Cannot read speed
sensor
Incline reading not
changing when
commanded
Incline reading has
changed without the
incline being
commanded.
Maximum or
minimum elevation
out of calibrated
ranges
• Lube deck with True Fitness liquid
silicone lubricant. Inspect wax bar
assembly on commercial models, if
worn to less that ¼ inch in thicknessreplace wax bar.
• Remove motor cover and vacuum dust
from area. Wipe down the exposed area
of the deck beside the straddle covers
with a clean, dry cloth.
• Check/Replace motor brushes as
needed.
• Reset timer.
• Perform Speed Sensor Test page 21
• See Elevation Not Functional page 9.
• See Elevation Not Functional page 9.
• See Elevation Not Functional page 9.
Liquid silicone single
use pack
Liquid Silicone
Applicator.
Vacuum
Shop towel
Support Services 800-883-8783 Mon-Fri 8:30am-5:00pm Central Time Zone Fax: 636-272-7148
Page 3
Symptom Probable Cause Corrective Action Recommended Tools
E2 O
ERROR
MESSAGES:
(cont’d)
OVERSPEED
E2 C
CALIBRATE
E3 E EEPROM
E2 R
RECALIBRATE
Belt speed ramping
too fast.
Micro-controller
cannot adjust belt
speed to target.
Software error during
treadmill startup
diagnostics.
Treadmill has lost
calibration settings.
Perform Amp Draw Test – Page
Perform Belt / Deck Wear Test – Page 21.
Calibrate Treadmill – Page 14.
See appropriate Symptom Guide – pages 10-11.
Restart Treadmill, if error persists- replace
control panel.
Recalibrate Treadmill – Page 14.
(If unit loses programs- replace control panel)
17.
Multi-meter
Phillips head
screwdriver
Page 4
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Symptom Probable Cause Corrective Action Recommended Tools
MOVEMENT
NO BELT
Treadmill in need of
calibration.
Missing command to
PWM.
Missing/incorrect
voltage to motor.
Damaged motor.
• Run calibration. (page 14)
--------
• Is PWM light blinking/ illuminated
when fast button is pushed?
NO- Check continuity on wire harness, if
harness has continuity breaks replace the
harness. If harness has continuity- replace
the upper panel. Refer to wiring harness
diagram for your model.
YES- move on to next step, wire harness and
control panel are OK.
--------
• With treadmill in calibration mode
(page 14)
• Set speed at 4 MPH
• Check VDC across MTR 1 and MTR 2
with the motor leads connected to the
motor the voltage should measure 10
VDC for every 1 MPH.
• If voltage is missing or low- Replace
PWM.
• If voltage is greater than 20 VDC/MPH
motor may have open windings.
--------
• With PWM LED Blinking/ Illuminated-
move the tread belt with your foot to see
if motor begins to move on its own.
• If motor begins to move, inspect the
condition of the brushes and the
commutator.
• If brushes are bad- replace brushes
• If motor doesn’t turn or has a damaged
com segment- replace motor.
Continue on next page…
Multi-meter
PWM / Motor test
cables
Note:
All trouble
shooting should
be performed in
calibration
mode.
Page 16
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Page 5
Symptom Probable Cause Corrective Action Recommended Tools
NO BELT
MOVEMENT
(cont’d)
Motor turns but belt
does not.
• Check belt tension.
• Set belt tension to 1/8-inch deflection or
correct tension can be verified by
twisting the belt almost to a 90-degree
position.
Note:
All trouble
shooting should
be performed in
calibration
mode.
Pa ge 14
Belt cannot be
moved manually-
foreign object under
belt.
--------
• Remove foreign object.
Perform the Amp Draw Test (page 17) to check
for excessive amp draw damage
Page 6
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Symptom Probable Cause Corrective Action Recommended Tools
TREADBELT
STOPS
DURING
WORKOUT
Error Code
displays:
Go to page 3 &
Page 4.
Loose safety key
connection
Belt movement issue
Worn Deck / Belt
Occurs when making
changes to speed or
elevation
Overloaded house
circuit
Continuity,
connection to motor
Tread belt not
centered or
obstructed
• Check safety key to ensure that it is
seating properly.
• Check connection sensitivity.
--------
• If treadmill will not reset with cycling
the power go to NO BELT
MOVEMENT (pages 5 & 6)
--------
• Perform Belt / Deck Wear Test
(page 21).
• Perform Amp Draw Test (page 17).
• Apply silicone.
• Replace Deck and Belt.
--------
• May be related to electro static
discharge. Contact Technical support
for assistance.
--------
• Verify the treadmill is on a dedicated
circuit with at least a 15 amp breaker
• Have customer supply a dedicated
circuit
--------
• Reconnect or replace motor wires or
connectors
--------
• Tension tread belt (page 19)
• Center tread belt
• Remove obstruction
Liquid silicone
single use pack
Liquid silicone
Applicator
Multi-meter
Socket set
Note:
All trouble
shooting should
be performed in
calibration
mode.
Page 14
Support Services 800-883-8783 Mon-Fri 8:30am-5:00pm Central Time Zone Fax: 636-272-7148
Page 7
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