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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
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Summary of Contents for True Fitness 455 Pediatric
- Page 1 © 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.
- Page 2 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-...
- Page 3 True Fitness Treadmill Service Manual START Symptom guide Calibration Procedures Diagnostic Procedures Test Procedures Wiring Diagrams Part Manuals Page 1...
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Page 4: Table Of Contents
SYMPTOM GUIDE Error Code Definitions ......No Belt Movement Tread Belt Stops During Workout ....Heart Rate Not Working / Erratic Readings . -
Page 5: Error Code Definitions
Support Services 800-883-8783 Corrective Action • Lube deck with True Fitness liquid silicone lubricant. Inspect wax bar assembly on commercial models, if worn to less that ¼ inch in thickness- replace wax bar. •... - Page 6 Symptom Probable Cause ERROR MESSAGES: (cont’d) Belt speed ramping E2 O too fast. OVERSPEED E2 C Micro-controller CALIBRATE cannot adjust belt speed to target. Software error during E3 E EEPROM treadmill startup diagnostics. Treadmill has lost E2 R calibration settings. RECALIBRATE Support Services 800-883-8783 Page 4...
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Page 7: No Belt Movement
Symptom Probable Cause Treadmill in need of NO BELT calibration. MOVEMENT Missing command to PWM. Missing/incorrect voltage to motor. Damaged motor. Support Services 800-883-8783 Corrective Action • 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. - Page 8 Symptom Probable Cause NO BELT Motor turns but belt MOVEMENT does not. (cont’d) Belt cannot be moved manually- foreign object under belt. Support Services 800-883-8783 Page 6 Corrective Action • 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.
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Page 9: Treadbelt Stops During Workout
Symptom Probable Cause TREADBELT Loose safety key connection STOPS DURING WORKOUT Error Code Belt movement issue displays: Go to page 3 & Page 4. Worn Deck / Belt Occurs when making changes to speed or elevation Overloaded house circuit Continuity, connection to motor Tread belt not centered or... -
Page 10: Heart Rate Not Working / Erratic Readings
Symptom Probable Cause Incorrect power source HEART RATE WORKING / ERRATIC READINGS Improper treadmill grounding Improper heart rate receiver mount Defective Chest Strap Defective receiver Radio Frequency Interference Support Services 800-883-8783 Page 8 Corrective Action • Verify that the treadmill is connected to a dedicated line, 15-amp circuit, and not on an extension cord. -
Page 11: Elevation Not Functional
Symptom Probable Cause Improper grounding ELEVATION / Calibration (May cause unit to FUNCTIONAL drift up & down ( E1 ERROR) without command) Unit is stuck at full incline Defective Start Capacitor Defective PWM Support Services 800-883-8783 Corrective Action • Test 110VAC outlet for proper grounding •... -
Page 12: Speed Fluctuation: E2 Cal
Symptom Probable Cause SPEED FLUCTUATION Speed Fluctuation E2: CAL (Due to high friction) Speed Fluctuation (Due to Voltage fluctuation) Bad Data Feedback Incorrect Speed Sensor Gap Support Services 800-883-8783 Page 10 Corrective Action • Perform Push Off Test (page 21) •... -
Page 13: E3: Eprom
Symptom Probable Cause SPEED FLUCTUATION No Belt Movement S4: Sensor E5: Speed Sensor E2: Overspeed E3: EPROM Error No/Intermittent Tach Feedback Overspeed Error E3: EPROM Error Software error during treadmill startup Support Services 800-883-8783 Corrective Action • Go to page 5, 6. -------- •... -
Page 14: No Display
Symptom Probable Cause No power at the 110 NO DISPLAY VAC outlet. No power to the treadmill. No power to the control panel. Support Services 800-883-8783 Page 12 Corrective Action • Check home circuit breaker. Reset as necessary. • Test for 110 VAC at outlet. •... -
Page 15: Circuit Breaker Trips At Start Up
Symptom Probable Cause Possible short in CIRCUIT treadmill wiring. BREAKER TRIPS Motor issues. Incline motor drawing treadmill down Bad PWM Too much tension on belt or obstruction belt. Weakened circuit breaker or High belt/deck friction Support Services 800-883-8783 Corrective Action •... -
Page 16: Calibration Procedures
Calibration Procedures 455 Calibration Enter Calibration Mode by holding the Up and Down keys while inserting the safety key In message center window displayed: Press Start to Calibrate NOTE: In Calibration mode, it is possible to check if the speed sensor is reading all the front roller magnets: the Met light will light when a magnet is in front of the sensor. -
Page 17: Diagnostics
To enter diagnostic mode, press and hold the FAST and SLOW buttons while pushing in the safety key. The control panel will show “Diagnostics”. Press the UP button: Total Hours (in whole hours) Press the UP button: Distance (in miles, two digits past decimal point) Press the UP button: Average Speed (in mph) Error List (This is an error log, but just a list of errors possible on the unit.) S1: Lube... - Page 18 TEST PROCEDURES Grounded Outlet Test Amp Draw Test Speed Sensor Test Voltage to Drive Motor Test Drive Motor Test Drive Belt Tension Test Tread belt Tension Test Incline Potentiometer Calibration Test Voltage to Incline Motor Test Belt / Deck Wear Test (Push Off Test) Page 17 Page 17 Page 18...
- Page 19 GROUNDED OUTLET TEST This test is very important for optimal HRC and incline operation. Set voltmeter for Volts AC Place 1 lead in the right side of the outlet (hot) Place 1 lead in the ground plug A properly grounded outlet will read 110 VAC AMP DRAW TEST This test is a good indicator of the wear condition of the belt and deck, and the need for lubrication.
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Page 20: Speed Sensor Test
SPEED SENSOR TEST This test is used to verify sensor operation in conditions of speed fluctuation, E2: Cal error, S4: Sensor error, E2: Overspeed error or Unsuccessful Calibration. 455 Treadmill Set voltmeter to volts DC. Treadmill power on and speed at 0 mph Attach voltmeter leads across outside 2 contacts at J1 on PWM With magnet in front of sensor, 0 VDC With no magnet in front of sensor, 5 VDC... -
Page 21: Drive Motor Test
DRIVE MOTOR TEST This test is used in conditions of No Belt Movement. Unplug treadmill and set voltmeter to volts DC Disconnect motor leads from PWM Place 1 voltmeter lead in each motor wire Gently spin the motor flywheel and check for voltage DC 2-5 VDC means normal motor operation 0 VDC means motor malfunction DRIVE BELT TENSION TEST... -
Page 22: Voltage To Incline Motor Test
INCLINE POTENTIOMETER CALIBRATION TEST This test can correct E1: Minimum conditions and aid in diagnosis of incline problems with finding zero or target incline. 455: Set voltmeter to Ohms (Ω) with treadmill unplugged from wall Place 1 voltmeter lead on pin 3 (Blue) and 1 lead on pin 2 (Orange) Check for 800 Ohms 455: In calibration mode before pressing Start, the Distance window displays the incline number. - Page 23 Belt / Deck Wear Test This is a simple physical test to gauge the general level of friction present between the deck and belt. 1. While the treadmill is not running, inspect the condition of the underside of the tread belt. The fabric should be soft and porous.
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Page 24: Wiring Diagram
Wiring Diagram Page 22 Page 22... -
Page 25: Parts List
CONTROL PANEL ss90 SPEED SENSOR (SS90 STYLE) DATA CABLE DRV MTR DRV BELT ELEVATION MTR (ELEVATION- HARDWARE) ELEVATION RACK WHEEL POWER CORD Page 23 455 Parts List 455 treadmil parts list WEIGHT PART # DESCRIPTION 70242103 Control Panel Assembly 70150000 SAFETY SWITCH ASSY. - Page 26 70233800 ROUND PEDESTAL WELDMENT 70155900 PEDESTAL SCREWS 70255903 FRAME WELDMENT ADJ. FRONT ROLLER 70155200 BUMPER FEET 70020200 BUMPER FEET SCREW 10/32X1 1/4PPH 70348900 LUBE STICK 70349000 SILICONE PACKET (1 APPLICATION) 70226501 455 Pediatric Handrails X 108 FT. DBL. STICK TAPE...