True Fitness 350-750 User Manual

True Fitness Service

Manual

Treadmills

Models 350-750

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 [phone]. 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 fabricnot 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 machineleave 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

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 . . .	. . . . . . . . . . . . . . . . . . . . . . . . . . . .. .		Page 11
	No Display . . . . .	. . . . . . . . . . . . . . . . . . . . .	. . . . . . . . .	Page 12
Circuit Breaker Trips at Start Up . . . . . . .			. . . . . . .. .	Page 13
	Soft Select Malfunctions . . . . . . . . . . . . . . .		. . . . . . . . .	Page 14, 15
	Calibration Procedures . . . . . . . . . . . . . . .		. . . . . . . . .	Page 16
	Diagnostics . . . . .	. . . . . . . . . . . . . . . . . . . .	. . . . . . . ..	Page 17

Page 2

Symptom			Probable Cause			Corrective Action		Recommended Tools
	ERROR							Liquid silicone single
MESSAGES:								use pack
S1 L	LUBE							Liquid Silicone
			Indicates that the			• Lube deck with True Fitness liquid		Applicator.
			accumulated distance			silicone lubricant. Inspect wax bar		Vacuum
			is such that the deck			assembly on commercial models, if		Shop towel
			needs to be lubed			worn to less that ¼ inch in thickness-
						replace wax bar.
S2 C	CLEAN		Indicates that the
			accumulated distance			• Remove motor cover and vacuum dust
			is such that the			from area. Wipe down the exposed area
			machine needs to be			of the deck beside the straddle covers
			cleaned.			with a clean, dry cloth.
S3 M	MOTOR		Indicates that the			• Check/Replace motor brushes as
			accumulated time on			needed.
			the treadmill is such			• Reset timer.
			that the motor brushes
			need to be
			changed/checked.
E5 S	SPEED		Cannot read speed
	SENSOR		sensor			• Perform Speed Sensor Test page 21
E1 S	STALL		Incline reading not			• See Elevation Not Functional page 9.
			changing when
			commanded
E1 I	INCLINE		Incline reading has			• See Elevation Not Functional page 9.
			changed without the
			incline being
			commanded.
E1 R	RANGE		Maximum or			• See Elevation Not Functional page 9.
			minimum elevation
			out of calibrated
			ranges
										Page 3
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Symptom

Probable Cause

Corrective Action

Recommended Tools

ERROR

MESSAGES:

(cont’d)

E2 O

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 20. Perform Belt / Deck Wear Test – Page 24.

Calibrate Treadmill – Page 16.

See appropriate Symptom Guide – pages 10-11.

Restart Treadmill, if error persistsreplace control panel.

Recalibrate Treadmill – Page 16.

(If unit loses programsreplace control panel)

Multi-meter Phillips head screwdriver

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Symptom

Probable Cause

Corrective Action

Recommended Tools

NO BELT	Treadmill in need of
MOVEMENT	calibration.
	Missing command to
	PWM.

Missing/incorrect voltage to motor.

Damaged motor.

•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. If harness has continuityreplace 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 16)

•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 lowReplace PWM.

•If voltage is greater than 20 VDC/MPH motor may have open windings.

--------

•With PWM LED Blinking/ Illuminatedmove 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 badreplace brushes

•If motor doesn’t turn or has a damaged com segmentreplace 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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Symptom

Probable Cause

Corrective Action

Recommended Tools

NO BELT	Motor turns but belt
MOVEMENT
(cont’d)	does not.

Belt cannot be moved manuallyforeign object under belt.

•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.

--------

•Remove foreign object.

Perform the Amp Draw Test (page 20) to check for excessive amp draw damage

Note:

All trouble shooting should be performed in calibration mode.

Page 16

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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 24).

•Perform Amp Draw Test (page 20).

•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 22)

•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 16

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Symptom

Probable Cause

Corrective Action

Recommended Tools

HEART RATE

NOT

WORKING /

ERRATIC

READINGS

Incorrect power source

Improper treadmill grounding

Improper heart rate receiver mount

Defective Chest

Strap

Defective receiver

Radio Frequency

Interference

•Verify that the treadmill is connected to a dedicated line, 15-amp circuit, and not on an extension cord.

•Move to proper outlet.

•Test 110 VAC outlet for proper ground

--------

•Proper grounding is vitally important.

•Ensure that the pedestal wire harness ground lead is secure

--------

•Ensure that the HR receiver is not touching metal and is mounted with the wires in a vertical position with the blue receiver facing the runner

--------

•Does the receiver pick up a signal from the HR simulator?

•If yes, replace chest strap

--------

•Does the heart rate LED on the control panel blink? If not then replace the receiver.

--------

•Locate RF sources and use process of elimination. Common sources of RF interference are: Invisible fences for pets; wireless networks; cordless phones, Cell phones, radios, home security sensors, etc.

Multi-meter

Double sided tape

Heart rate simulator

Note:

All trouble shooting should be performed in calibration mode.

Page 16

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Symptom

Probable Cause

Corrective Action

Recommended Tools

ELEVATION

NOT

FUNCTIONAL ( E1 ERROR)

Improper grounding / Calibration

(May cause unit to drift up & down without command)

Unit is stuck at full incline

Defective Start

Capacitor

Defective PWM

•Test 110VAC outlet for proper grounding

•If unit has not been calibrated – calibrate

•Ensure that incline cables are secure on PWM

--------

•Verify the lower limit switch is properly connected to the PWM

•Remove the LLS wire from the PWM and short the two posts of the connector together with an alligator clip. Cycle the power. If the treadmill lowers itself then replace the lower limit switch.

•Perform Incline potentiometer calibration procedure (page 16)

•If incline nut is strippedreplace incline nut

--------

•Do Up/Down command LED’s light?

•If Noskip to defective PWM section.

•If yesdoes motor hum with no movement?

•If yescheck the leads to the capacitor for breaks, if no breaksreplace capacitor.

•If Noreplace PWM.

--------

•If no Up/Down LED’s light check continuity on data cables.

•If cables are goodreplace Upper Panel.

•If cables badReplace data cables.

Multi-meter

Alligator clip

Note:

All trouble shooting should be performed in calibration mode.

Page 16

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Symptom

Probable Cause

Corrective Action

Recommended Tools

SPEED

FLUCTUATION

E2: CAL

Speed Fluctuation (Due to high friction)

Speed Fluctuation (Due to Voltage fluctuation)

Bad Data Feedback

Incorrect Speed

Sensor Gap

•Perform Push Off Test (page 24)

•Perform Amp Draw Test (page 20)

--------

•Check Line voltage for fluctuations.

•Have customer take corrective action.

--------

•Verify tach feedback accuracy through out the speed range.

•If inaccurate perform speed sensor test

(page 21)

--------

•Verify correct Speed sensor Gap.

•Gap should be equal to the thickness of

(3) credit cards pressed together (approximately 1/8 to ¼ inch)

------

Multi-meter

Socket Set

Silicone Lubrication

Packet

Silicone Lubrication

Applicator

Note: All trouble shooting should be performed in Calibration Mode:

See SG-12

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Symptom

Probable Cause

Corrective Action

Recommended Tools

SPEED

FLUCTUATION

S4: Sensor

E5: Speed Sensor

E2: Overspeed

E3: EPROM Error

No Belt Movement

No/Intermittent

Tach Feedback

Overspeed Error

E3: EPROM Error Software error during treadmill startup

•Go to page 5, 6.

--------

•Enter Calibration mode (page 16)

•Verify speed feedback in speed display through out the speed range. [Speed display should never show 0 mph when belt is moving]

•If no tach feedback is available perform speed sensor test (page 21).

•Check continuity of tach feedback portion of the data cable (To identify tach feed back lines see wiring diagram section for specific model).

--------

•Check/Adjust tread belt tension (page

22)

•Perform speed sensor test (page 21) If speed sensor fails adjust gap, if still fails-replace speed sensor.

•Perform belt / deck wear test (page 24) If badly worn, replace belt and deck.

•Replace PWM

--------

•Restart unitif error persists, replace control panel.

Multi-meter

Socket Set

Silicone Lubrication

Packet

Silicone Lubrication

Applicator

Note:

All trouble shooting should be performed in calibration mode.

Page 16

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Symptom

Probable Cause

Corrective Action

Recommended Tools

NO DISPLAY No power at the 110 VAC outlet.

No power to the treadmill.

No power to the control panel.

•Check home circuit breaker. Reset as necessary.

•Test for 110 VAC at outlet.

•Identify if outlet is a GFI.

Note: Some brands of GFI outlets are too sensitive for treadmill use. Call the help line if encountering GFI issues.

--------

•Check for AC light on PWM. (See diagram pages 23-30)

•Check for 110 VAC at power cord. Replace if no power.

•If YesCheck for 110 VAC at tread power switch. Replace if no power.

•If Yes-Check for 110 VAC at tread circuit breaker. Replace/ reset if necessary.

•If YesCheck for 110 VAC at PWM across AC1 & AC2.

•If YesReplace PWM.

--------

•Check status LED +11 VDC on PWM (See diagram pages 23-30). If not remove fuses and check continuity as replace as needed.

•If YesCheck wire harness connections at PWM and Control Panel. Reconnect as needed.

•If YesCheck voltage on harness at panel. Refer to wiring diagram for your machine type in wiring diagram section. If voltage is present– replace panel and recalibrate (page 16). If voltage is not present check voltage at PWM. If voltage is present at PWM replace pedestal wire harness. If 0 VDC replace PWM and recalibrate (page 16).

Allen Key set.

Phillips head screwdriver.

Multi-meter.

Note:

All trouble shooting should be performed in calibration mode.

Page 16

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Symptom

Probable Cause

Corrective Action

Recommended Tools

CIRCUIT	Possible short in
BREAKER	treadmill wiring.
TRIPS

Motor issues.

Incline motor drawing treadmill down

Bad PWM

Too much tension on belt or obstruction under belt.

Weakened circuit breaker or High belt/deck friction

•Power off the treadmill and inspect all wiring for shorts or burned areas.

•Secure all connectors.

--------

•Disconnect motor leads from the PWM. Power on treadmill, press start. If the breaker does not trip check the motor brushes and perform the motor test procedure (page 22).

•Reconnect motor to the PWM, if the breaker tripsreplace the motor.

--------

•Unplug incline motor.

•Power on treadmill, if breaker does not tripreplace incline motor.

--------

•Unplug PWM, power on machine. If breaker doesn’t tripreplace PWM.

--------

•Check for correct tension adjustment

(page 22)

•Check for obstructionremove obstruction.

--------

•Perform AC Amp Draw Test (page 20) at circuit breaker.

•If draw is less than 15 amps continuously - replace breaker.

•Perform Amp Draw test (page 20) If Amp draw is higher than recommended try push test (page 24) procedure.

Allen Key set

Needle nose pliers

Socket set

Multi-meter

Note:

All trouble shooting should be performed in calibration mode.

Page 16

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Symptom

Probable Cause

Corrective Action

Soft Select	Control Panel Issues
Malfunctions
	Mechanical Issues

Incorrect/ Missing

Count Values

Defective Motor/

Start Capacitor

•Enter calibration mode

•Is there a count value displayed in the distance window? If No replace control panel. If yescontinue to next step.

--------

•Press and hold the softer button, release. Press and hold the firmer button to detect carriage movement in both directions. If the carriage cannot go full range from –220 and consistently stops in the same place, check for mechanical binding. Inspect the under pan for damage or areas that cause mechanical binding. Also inspect the carriage track in the side frame for binding. If the carriage cannot move to its full range and back in the time limit, check for mechanical binding.

•If the carriage is not moving and the motor is turning, check the set screws holding the drive shaft to the motor shaft.

--------

•Threaded shaft turns when commanded but the pulse count does not display/ or does not change. Physically check the hex cam located at the front of the shaft and on the motor shaft. Hex cam should be firmly attached. If hex cam slides freely super gluing it back onto the shaft can repair it.

•Hex cam moves but counter does not register. Ensure that the micro switch is properly adjusted and the switch is being made when the hex cam points press against the roller.

•Disconnect the cable at J4 and check for continuity on cable. Cable should have continuity if the switch roller is in a flat area of hex cam. If no continuityreplace cable. If good continuity, place cable back on J4 and continue

•While in calibration mode place the multi-meter leads on J4 and check for 5 Volts. If no 5 Voltsreplace board.

--------

•If command and count data/voltage are present and Led 1 indicates AC voltage is good but soft select motor does not respond. Set probes on TP 8 and TP3, press soft command (with soft select limit switch not activated) result should be 120 VAC. Set probes on TP8 and TP2 and press firm command (with soft select limit switch not activated) result should be 120 VAC. If no 120 VAC on either test pointreplace soft select board. If voltage is correctcontinue to next step.

•In calibration mode, place red lead on the larger red wire and post on the start capacitor of the soft select system and the black lead on the common black lead, press firmthe result should be 120 VDC. Next place the white lead on the larger white wire and post on the start capacitor of the soft select system and the black lead on the common black lead; press softthe result should be 120 VDC. If voltage is correctreplace the motor. If voltage is incorrectreplace the start capacitor.

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Symptom

Probable Cause

Corrective Action

Soft Select

Malfunctions AC Power Issues

(continued)

Wire Harness

•Is AC power LED D3 lit?

•Nocheck F1 fuse. If F1 is good check for AC voltage between TP1 and TP5. If fuse and voltage are goodreplace the board.

--------

•YesWhile in calibration mode Press the Softer buttonLED D1 should light, press the Firmer buttonLED D2 should light. If the lights respond to the button then command is being sent from the

upper board and received at the soft select board. If lights do not respond check or replace 6-pin data cable, if cable is okreplace upper panel.

-------

SOFT SELECT BOARD

ILLUSTRATION

					Page 15
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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. 12mph= 121 Belt revs/per min. Press Start/Reset to save max speed, wait for belt to stop.

Mode 2: Speed Table

Press Select/Enter-02 (C2 for 450) appears in Distance

Press Start/Reset to set speed table. Treadmill will speed up and slow down on its own. Wait for belt to stop.

Mode 3: Incline

Press Select/Enter- 03 (C3 for 450) appears in distance

Press Grade Up to upper incline limit, then back down slightly

Save upper limit by pressing Start/Reset

Turn treadmill off and then back on and check operation

SS90 Calibration (6-8xxxx serial numbers and after)

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. Speed must be less than 1 mph.

Press Start/Reset to begin calibration

Treadmill will elevate and speed up/slow down. Wait for belt to stop.

Message center window will display: Successful, or will indicate error area.

Remove and re-insert safety key. Check operation of treadmill.

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DIAGNOSTICS (Available only in SS90 Machines)

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

S2: Clean

S3: Motor

S4: Sensor

E1: Minimum

E2: Overspeed

E2: Cal

E3: EPROM

Remove Safety Key to exit Diagnostics

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Page 18

TEST PROCEDURES

	Grounded Outlet Test	Page 20
	Amp Draw Test	Page 20
	Speed Sensor Test	Page 21
Voltage to Drive Motor Test		Page 21
	Drive Motor Test	Page 22
Drive Belt Tension Test		Page 22
Tread belt Tension Test		Page 22
Incline Potentiometer Calibration Test		Page 23
Voltage to Incline Motor Test		Page 23
Belt / Deck Wear Test (Push Off Test)		Page 24

Page 19

TEST PROCEDURES

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.

The treadmill circuit breaker will trip at 15 amps, so be sure the voltmeter you are using is rated for at least 15 amps when you are load testing the treadmill. This test can be performed either on one of the AC power cord leads or on one of the DC motor leads from the PWM to the motor. Testing the amp draw at certain speeds without load and with load will signal whether higher than normal amp draw is a result of PWM failure or increased friction from belt and deck wear.

AC AMP DRAW PROCEDURE

This procedure requires an AC clamp-on ammeter. Place the clamp around either of the power cord leads, black or white. Load test requires a person to walk on the tread belt for 5-10 minutes.

2.5 mph w/out load	2.0-2.5 AMPS AC
2.5 mph with load	2.75-3.75 AMPS AC
5.0 mph w/out load	3.5-4.0 AMPS AC
5.0 mph with load	5.0-7.0 AMPS AC

DC AMP DRAW PROCEDURE

This procedure can be performed with an ordinary voltmeter. (Note: Be sure the voltmeter is rated to handle 15 DC amps.) Disconnect the red motor lead from MTR1 on the PWM. Connect the voltmeter to MTR 1 on the PWM and the other voltmeter lead to the red motor lead so that the voltmeter completes the connection of the PWM to the motor.

2.5 mph w/out load	4.5-5.0 AMPS DC
2.5 mph with load	7.0-8.0 AMPS DC
5.0 mph w/out load	5.0-5.5 AMPS DC
5.0 mph with load	8.5-9.0 AMPS DC

Higher than normal amp draws without load may signal that belt tension is too tight or there is a problem in the Drive Motor or PWM. Perform the Drive Motor Test and visually check the motor brushes before replacing the PWM. Higher than normal amp draws with load after normal readings without load signal belt and deck friction which may require lubrication or replacement.

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TEST PROCEDURES

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

SS90 (Serial numbers 6-8000 and above)

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

Check the sensor on every magnet, adjust sensor until voltage shows

In calibration mode before pressing Start, the tread belt can be moved manually and the Met light will blink when a magnet is in front of the sensor.

VOLTAGE TO DRIVE MOTOR TEST

This test is used to diagnose conditions of NO Belt Movement, or Speed Fluctuations

Set voltmeter to volts DC and adjust speed on Control Panel to 4 mph Attach red voltmeter lead to MTR1 on PWM with motor wires attached Attach black voltmeter lead to MTR2 on PWM with motor wires attached 0 VDC signals no PWM output

166 VDC signals open circuit in motor or motor connection Operating voltage will lay between 0 VDC and 166 VDC

NOTE: The reason that we do not narrow down PWM output voltage is that the PWM output is a pulse signal. The sampling rate of the voltmeter used will determine what output voltage the voltmeter is able to read.

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TEST PROCEDURES

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

This test is used in front roller replacement and in conditions of belt slipping.

Place two fingers on top of the drive belt halfway between the front roller pulley and the drive motor pulley.

With moderate pressure push down on belt

If belt deflects down more than 1/8 “, tighten motor mounts If belt deflects down less than 1/8 “, loosen motor mounts.

It is also possible to twist the belt; you should be able to twist the belt almost to a vertical position

TREADBELT TENSION TEST

This test will address belt slipping and is used in any roller replacement or deck replacement. Ensure that the drive belt is properly tensioned before adjusting tread belt tension. Belt and deck wear and/or lack of lubrication can cause the tread belt to show symptoms similar to loose tread belt tensioncheck these conditions before adjusting tread belt tension.

Turn treadmill on and adjust speed to 2 mph

Walk heavily on the belt pulling slightly against belt movement

If hesitation or slip is detected, tighten tread belt tension bolts ¼ turn

Repeat until no hesitation or slip is encountered. Check at higher speeds

Tread belt tension is too tight if the belt feels stiff to touch with no give or the belt groans against the rollers. You should be able to insert your hand between the belt and deck palm up almost to your thumb when the belt is at proper tension.

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TEST PROCEDURES

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. With the treadmill at zero, the number should be between 160 and 180. 0 often indicates a wire harness misconnection or failure of signal to panel.

As the unit inclines during calibration, watch the numbers in the Distance window, if they do not increase by at least 60 from the zero value, an E1: Minimum error will result. Then the zero value may need to be rest to a lower value.

If incline potentiometer needs adjustment, remove swivel opines and twist incline motor shaft by hand for SS100 or use Up and Down keys for SS90. (See diagram on T-6)

VOLTAGE TO INCLINE MOTOR TEST

This test is utilized in conditions of No Incline Movement, Incline Fluctuation, or E1: Minimum.

Set voltmeter to AC volts. To access incline plug, PWM screws may need to be removed. Place voltmeter leads across White and Black while pushing UP button

10 VAC indicates normal PWM output, 0 VAC signals no output

Place voltmeter leads across Red and White while pushing Down button 110 VAC indicates normal PWM output, 0 VAC signals no output

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