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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-...
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True Fitness Treadmill Service Manual START Symptom guide Calibration Procedures Diagnostic Procedures Test Procedures Wiring Diagrams Part Manuals Page 1...
SYMPTOM GUIDE Error Code Definitions ......No Belt Movement Tread Belt Stops During Workout ....Heart Rate Not Working / Erratic Readings .
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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. •...
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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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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 16) -------- • Is PWM light blinking/ illuminated when fast button is pushed? NO- Check continuity on wire harness, if harness has continuity breaks replace the harness.
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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.
Symptom Probable Cause Loose safety key TREADBELT 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...
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.
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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 •...
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 24) •...
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. •...
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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 •...
Symptom Probable Cause Control Panel Issues Soft Select Malfunctions Mechanical Issues Incorrect/ Missing Count Values Defective Motor/ Start Capacitor Support Services 800-883-8783 Page 14 Corrective Action • Enter calibration mode • Is there a count value displayed in the distance window? If No replace control panel.
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Symptom Probable Cause Soft Select AC Power Issues Malfunctions (continued) Wire Harness Support Services 800-883-8783 • Is AC power LED D3 lit? • No- check F1 fuse. If F1 is good check for AC voltage between TP1 and TP5. If fuse and voltage are good- replace the board. •...
Calibration Procedures SS 100 PWM (5-xxxxx to 6-79999 serial numbers) Entering Engineering Mode: With safety key in, power up unit while holding Grade Up and Grade Down keys. Incline will reset to zero. Mode 1: Max Speed Press Select/Enter- 01 (C1 for 450) appears in Distance. Adjust speed using Fast and Slow buttons until 10 or 12 mph Verify speed by counting belt revolutions: 10mph= 102 Belt revs/per min.
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...
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 20 Page 20 Page 21...
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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.
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. SS100 (Serial numbers 5-xxxx to 6-7999) Set voltmeter to Volts DC. Treadmill power on speed and speed at 0mph Attach voltmeter leads across outside 2 contacts at P2 on PWM With magnet in front of sensor, 0 VDC With no magnet in front of sensor, 3.0 VDC...
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...
INCLINE POTENTIOMETER CALIBRATION TEST This test can correct E1: Minimum conditions and aid in diagnosis of incline problems with finding zero or target incline. SS100 and SS90 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 SS90 Only: In calibration mode before pressing Start, the Distance window displays the incline number.
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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.
Model 350-450 Parts List 350, P, HRC 350PB, HRCB 400, P, HRC 450, P, HRC (SS100-SS90) Page 41 Page 34 Page 37 Page 39 Page 33...
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CONTROL PANEL 350 Board Only (98- Present) (98-PRESENT) (HARDWARE) OVERLAYS SPEED SENSOR DATA CABLE DRV MTR DRV BELT ELEVATION MTR Page 34 350P, HRC 350 P, HRC PARTS LIST PART # DESCRIPTION 70186311 350 P Board Only 70186310 350 HRC Board Only 70186401 350P CONTROL PANEL 70186402 350HRC CONTROL PANEL 70185400 HRC RECEIVER ASSY.
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ELEVATION RACK 70184401 ELEVATION RISER ASSY. 70176700 MOLDED WHEEL 70182300 INCLINE RISER BOLT 5/16- 18 X 1 1/4 70115200 INCLINE RISER WASHER 3.8 I.D. X 7/8 O.D. 70209900 INCLINE RISER NUT 5/16- 18 AUTOMATION GR. POWER CORD 70253100 9FT. POWER CORD 70008200 STRAIN RELEIF BUSHING ON / OFF SWITCH 70251100 ROCKER ON/OFF SWITCH...
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ELEVATION RACK WHEEL POWER CORD ON / OFF SWITCH CIRCUIT BREAKER TREADBELT DECK FRONT ROLLER (SS100-NARROW) (96-xxxx - 99) (99-81023G TO) (PRESENT) REAR ROLLER STRADDLE COVERS PEDESTAL (98 style) (99- 00 style) FRAME Page 42 70118900 TORQUE ARM SWIVEL PIN 70183200 START CAPACITOR FOR INCLINE MOTOR 70013500...
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Model 500-550 Parts List 500, P, HRC (SS100-SS90) 500Z & ZT, P, HRC 540, P, HRC, CI (NON Z) 540Z, ZT, P, HRC, CI 550, P, HRC 550z, P, HRC, CI 550 ZTX, P, HRC, CI Page 44 Page 48 Page 51 Page 54 Page 57...
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CONTROL PANEL 500 Boards Only (SS90) Up to 98 with a letter 500 (99 Style Board Only) (98 with a letter) 500A (2000) Style Board Only OVERLAY (SS100 OVERLAY) (98 OVERLAY) (99 OVERLAY) (98 with a letter) (2000 STYLE) (SS100) Page 44 500P, HRC (SS100-SS90)
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SPEED SENSOR DATA CABLE (SS100) DRV MTR (SS100) DRV BELT ELEVATION MTR ELEVATION RACK WHEEL / BOLTS (NEW STYLE) POWER CORD 70183500 500CI PWM [96-80000]-[98-80000]SS95 70154800 SPEED SENSOR ASSY.-SS100 70243200 SS90 SPEED SENSOR NEW STYLE 70119400 DATA CABLE-SS100 NON, P, HRC 70120400 LOWER WIRE HARNESS-SS100 70337900...
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CONTROL PANEL (500ZT's) Overlay Only Z also (500ZT'S) BOARDS ONLY (500ZT EX'S) BOARDS ONLY International SAME PANELS AS NEW 500ZT SERIES. 500 ZT SERIES SPEED SENSOR DATA CABLE 500 ZT SERIES DRIVE MOTOR DRV BELT Page 48 500Z & ZT, P, HRC PARTS LIST PART # DESCRIPTION...
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CONTROL PANEL (540Z's) Overlay only (540ZT's)Overlays only (540ZT'S)BOARDS ONLY 540ZT EX'S BOARDS ONLY International ALL 540ZT PANEL ARE THE SAME AS THE REG, 540Z OVERLAY 540 ZT SERIES SPEED SENSOR DATA CABLE ALSO FOR 540ZT DRIVE MOTOR Page 54 540Z, ZT, P, HRC, CI PARTS LIST PART # DESCRIPTION...
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70013500 70125500 70115200 70125600 DRV BELT 70006300 ELEVATION MTR 70113200 70115500 70116700 70013500 70118900 70121000 70120500 ELEVATION RACK (ZT) 70281003 70154600 POWER CORD 70253100 ON / OFF SWITCH 70251100 CIRCUIT BREAKER 70017200 TREADBELT 70290000 70289900 (ZT) 70321800 70321900 DECK 70288900 (ZT) 70324400 FRONT ROLLER...
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REAR ROLLER STRADDLE COVERS (ZT) RAMRAILS PEDESTAL (ZT) FRAME (ZT) LUBRICATION Page 56 70275500 REAR ROLLER 70263900 STRADDLE COVER/ALUM. 54 1/2" 55 70343700 540ZT PLASTIC STRAD. CVRS. 70327002 Plastic Insert 70343901 540ZT Alum Side Covers 70030900 3/8X1/16X108FT ROLL DBL. SIDE STICK T 70243400 BLUE TAPE - STR.
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PART # CONTROL PANEL 550 Board Only 70237519 70237518 70237610 70279200 70279100 70279000 OVERLAY 70279201 70279101 70150000 70279001 70132500 70183500 SPEED SENSOR 70243200 DATA CABLE 70337900 70337800 70337700 DRV MTR 70325500 DRV BELT 70006300 ELEVATION MTR 70113200 70121000 ELEVATION RACK 70281003 POWER CORD 70253100...
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CONTROL PANEL (600) Board Only OVERLAY SPEED SENSOR DATA CABLE DRV MTR DRV BELT ELEVATION MTR Page 64 600P, HRC PARTS LIST PART # DESCRIPTION 70237412 600NON Board Only 70237411 600P Board Only 70237410 600HRC Board Only 70269900 600NON DOT PANEL 00-PRESENT 70269901 600P DOT PANEL 00-PRESENT 70150000...
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CONTROL PANEL (SS100) (97-98 STYLE) Board Only (99-PRESENT) (DOT Control Board) OVERLAY (SS100 STYLE) (97-98 STYLE) (99-PRESENT) (SS100) (96-800000-) (PRESENT) Page 70 SPEED SENSOR (SS90 STYLE-98-) 700P, HRC (SS100-SS90) PARTS LIST PART # DESCRIPTION 70119300 700NON SS100 PANEL 95-96 70119900 700P SS100 PANEL 95-96 70179700 700HRC SS100 PANEL 95-95...
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(99-PRESENT) 70243201 DATA CABLE 70337900 70337800 DRV MTR 70325600 70263500 70155300 70146500 DRV BELT 70127600 ELEVATION MTR 70171500 (HARDWARE) 70126200 70118900 70115500 70116700 70022600 70121000 70018100 70120500 ELEVATION RACK 70176700 (BEFORE AUG99) 70003100 AFTER AUG., 99) 70176701 70174300 POWER CORD 70282900 70008200 ON / OFF SWITCH...
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FRONT ROLLER (NON-ADJ.) (ADJ. NOV.-00) REAR ROLLER STRADDLE COVERS RAMRAILS PEDESTAL AUTO WAXER LUBRICATION Page 72 70158000 DECK 70086700 DECK SUSP. BLOCK SCREW6X1 70020200 DECK SCREWS 10/32X1 1/4" 70150800 FRONT ROLLER ASSY, 700 W/SS100 70164700 FRONT ROLLER 8 MAGNET/NON ADJ 70265300 FRONT ROLLER ADJ.-NOV.2000 70005600...
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700A, P, HRC PARTS LIST WEIGHT PART # DESCRIPTION 70298413 700A NON Board Only 70237517 700A P Board Only 70237516 700A HRC Board Only 70311700 700A DOT PANEL ASSY. 70312100 700A P 70312000 700A HRC 70240505 EXTRUSION PANEL CLIP28 3/4" LG 70020300 SCREW 6-32x3/8 PPHMS BLK OX 70182800...
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70158900 BOLT HEX HEAD TAP, Gird 5-5/16 70162109 STRADDLE COVER/ALUM. 54 1/2" 55 70031200 TAPE 1/2"x18yd. Adhesive 70030900 TAPE, 3/8x1/16x108ft. DBL stick-49 70243400 BLUE TAPE -STR. CVR. 1/2x150ft roll 70086700 6x1 DRYWALL SCREW 70274105 CHR RAM RAIL 70280600 NON CHR RAIL (ram) 70210600 #10x3/4 PPH TEK Screw-boo 70277601...
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PART # CONTROL PANEL (98 STYLE) Board Only (99-00 STYLE) Board Only OVERLAYS (98 STYLE) ( 99- 00 STYLE) SPEED SENSOR DATA CABLE Page 76 DRV MTR 725P, HRC PARTS LIST DESCRIPTION 70132412 725 NON CONTROL Board Only-SS90 (98) 70132411 725P CONTROL Board Only-SS90 (98) 70132410 725HRC CONTROL Board Only-SS90 (98)