Precor C944 Manuale utente

C944 Treadmill

Page 1

C944 Treadmill

Warning: This service manual is for use by Precor trained service providers only.

IfyouarenotaPrecorTrainedServicer,youmustnotattempttoserviceanyPrecorProduct;

Call your dealer for service.

This document contains information required to perform the majority of troubleshooting, and

replacement procedures required to repair and maintain this product.

This document contains general product information, software diagnostic procedures (when

available), preventative maintenance procedures, inspection and adjustment procedures,

troubleshooting procedures, replacement procedures and electrical block and wiring diagrams.

To move directly to a procedure, click the appropriate procedure in the bookmark section to the

left of this page. You may “drag” the separator bar between this page and the bookmark section

to change the size of the page being viewed.

Unauthorized Reproduction and Distribution Prohibited By Law

C944 Treadmill

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Section One - Things you Should Know

About This Appendix

Section One, Things You Should Know. This section includes technical specifications. Read

this section, as well as the C944 Treadmill Owner’s Manual, before you perform the maintenance

procedures in this manual.

Section Two, Software Features. Precor’s C944 Treadmill is programmed with several

diagnostic and setup features. This section contains the procedures you need to access the

diagnostic features on this treadmill.

Section Three, Checking Treadmill Operation. This section provides you with a quick way of

checking treadmill operation. Check treadmill operation at the end of a maintenance procedure

and when it is necessary to ensure that the treadmill is operating properly.

Section Four, Inspection and Adjustment Procedures. Perform inspection procedures when

a trouble symptom points to a particular problem and after removing and replacing major

components. Many maintenance problems can be fixed by adjusting various treadmill

components. This section also provides you with the step-by-step procedures required to make

these adjustments.

Section Five, Troubleshooting Procedures. The diagnostic and troubleshooting procedures

contained in this section should be performed when it is necessary to isolate a problem to a

particular component.

Section Six, Replacement Procedures. When a treadmill component must be replaced, go to

this section and follow the step-by-step procedures required to remove and replace the

component.

Section Seven, Technical Diagrams and Parts Lists. This section includes wiring diagrams,

and block diagrams for SCR and PWM C944 Treadmills.

General Information

For the latest exploded view, part number and part pricing information, visit the Precor dealer

website at “www.precor.com/Dealer”.

C944 Treadmill

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Technical Specifications

Physical Specifications

Length: 76 inches (193 cm)

Width: Handrails 31.5 inches (80 cm)

Base 28.5 inches (72 cm)

Height: 44 inches (112 cm)

Running surface: 53 inches by 18 inches (135 cm by 46 cm)

Motor: 2 hp continuous duty DC (120 Vac and 240 Vac

models)

Speed: 0.5 to 12 mph (0.8 to 19 kph)

10 mph is equivalent to a 6 minute mile

Incline: -2% to +12% grade

Power: 50/60 Hz 120 Vac

50/60 Hz 240 Vac

Weight: 276 lbs (119 kg)

Shipping Weight: 326 lbs (147 kg)

C944 Treadmill

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Procedure 2.1 - Accessing the Diagnostic Software

The C944 Treadmill's diagnostic software consists of the following modes:

• Display Test

• Manual Lift Adjust

• Troubleshoot Lift

• Software Version

• Power Bits

• Keypad Test

Procedure

1. Plug the power cord into the wall outlet, then turn on the treadmill with the circuit breaker.

2. With the PRECOR C944 banner scrolling, press the SPEED ▲, SPEED ▼and INCLINE ▲

keys simultaneously or keys RESET,5,1,7,6.5.7.6,1, sequentially on units with standard

access codes (see Diagram 2.1).

3. Watch the electronic display as the LED test progresses. This test is programmed to display

the following LED illumination sequence.

a Every LED on the left display window illuminates simultaneously

b The lower row of the display window cycles from red to yellow to green.

c Diagonal lines of illuminated LEDs sweep across the left display window.

d The right display windows illuminate, then decrement from 8.8.8.8 to 0.0.0.0.

e The function LEDs illuminate simultaneously and then extinguish.

f Each function LED illuminates separately and then extinguishes.

4. If you do not observe the LED illumination sequences described in Step 3...

THEN... OTHERWISE...

Replace the upper PCA as described The LED passed successfully;

in Procedure 5.2 of the Commercial continue with the next step.

Treadmill Service Manual.

C944 Treadmill

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Diagram 2.1. C944 Treadmill Display

5. With the ADJUST LIFT banner scrolling, press the INCLINE keys. The running deck will

incline when the INCLINE ▲ key is pressed and decline as the INCLINE ▼key is pressed.

The running deck will stop moving when the key is released. After the INCLINE keys are

pressed, the message, PRESS ENTER WHEN FINISHED will scroll by.

Note:

The following diagnostic test automatically searches for the upper and lower limit switches and

the zero sense switch. It also detects a non-functional (non-moving) lift.

6. Watch the electronic console. If the three limit switches are adjusted correctly, the following

series of messages is displayed on the electronic console:

GOING TO TWELVE PERCENT

AT TWELVE PERCENT

GOING TO UPPER LIMIT

GOING TO NEG TWO PERCENT

AT NEGATIVE TWO PERCENT

GOING TO LOWER LIMIT

GOING TO ZERO

7. If all of the messages listed in Step 6 are displayed on the electronic console...

C944 Treadmill

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THEN... OTHERWISE...

The treadmill lift switches are Press RESET to return to the PRESS

calibrated correctly, press ENTER ENTER FOR PROGRAMS prompt,

to continue. then calibrate the lift systems

described in Procedure 4.1.

Note:

Software revision changes can only be made by replacing the currently installed PROM. The

revision of the software does not change by resetting the system. Some software updates may

require the user to perform a system reset.

Software numbers are invaluable for tracking and identifying problems and keeping abreast of

changes to the operation and features of the product.

8. The message VERSION scrolls across the display and will continue to do so while you hold

any key down. When the key is released you will see the software version number displayed

in the middle right seven-segment display. Press ENTER to exit this mode.

Note:

The following mode allows manual control of the motor speed while displaying the power bits. It

is useful in determining if the system is having difficulties running the motor and belt.

9. The message POWER BITS scrolls across the display once. Two numbers appear in the

right upper and right middle seven-segment displays. The upper number is the power bits

and the lower number is the requested speed in miles-per-hour (or kilometers-per-hour).

Press the SPEED ▲key to start the motor. The SPEED ▲, SPEED ▼, STOP and ENTER

keys are active in this mode.

10. Press the SPEED keys while you watch the right display window. The power bits number

increments as the SPEED ▲key is pressed and decrements as the SPEED ▼key is

pressed.

11. Press either the STOP key or the ENTER key to stop the motor and exit this diagnostic.

Press the SPEED ▼key until zero MPH (or KPH) is attained if you wish to stop the motor but

not exit this diagnostic.

Note:

The keypad test is useful for troubleshooting stuck or non-operating keys on the keypad.

C944 Treadmill

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12. Press each key listed below. Verify that each single dot expands to four dots as the

appropriate key is pressed.

ENTER Expands the far left dot.

INCLINE ▼Expands the second dot from the left.

INCLINE ▲Expands the third dot from the left.

STOP/RESET Expands the center dot.

SPEED ▼Expands the third dot from the right.

SPEED ▲Expands the second dot from the right.

QUICK START/CHANGE Expands the far right dot.

13. If the left display window column illuminates appropriately as each key is pressed...

THEN... OTHERWISE...

The keypad test passed successfully; Troubleshoot the upper PCA and

continue with the next step. keypad as described in Procedure 5.1

of this appendix.

14. End the keypad test by pressing the INCLINE ▼and SPEED ▲keys simultaneously.

C944 Treadmill

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Procedure 2.2 - Displaying the Treadmill Odometer

This procedure displays total distance (in miles or kilometers) the treadmill has operated. The

odometer cannot be reset.

Note:

The odometers get updated at the end of the course. If a user shuts off the unit while in the

middle of a course, the odometer will not be updated and the user will have essentially lost the

mileage for that session. Pressing RESET displays the PRECOR C944 banner and accumulates

the mileage.

Procedure

1. Plug the power cord into the wall outlet, then turn on the treadmill with the circuit breaker.

2. With the PRECOR C944 banner scrolling, press the INCLINE ▲and SPEED ▲keys

simultaneously or keys RESET,6,5, sequentially on units with standard access codes.

Note:

The right display window displays total miles or kilometers on the treadmill (see

Diagram 2.2). The top display window shows the most significant bits of the number; the lower

display window shows the least significant bits of the number. The number displayed is

102,187,723 (in miles or kilometers).

3. Press ENTER to return to the PRECOR C944 banner.

Diagram 2.2. - Odometer Display

0001

0218

7723

C944 Treadmill

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Procedure 2.3 - Changing Club Settings

This procedure allows you to change the following club settings:

• English Standard /Metric Units

Selecting United States standard units causes data to be displayed in feet, miles and

pounds. Data is displayed in meters, kilograms and kilometers if metric units are selected.

• Maximum Speed

This selection is used to artificially limit the maximum speed the treadmill can attain when a

user is working out.The C944 Treadmill can attain an absolute maximum speed of 12.0

MPH (20.0 KPH) for PWM units and 10.0 MPH (16.0 KPH) for SCR units. This speed selec-

tion mode cannot exceed these speeds, but rather speeds may be selected that are lower

than these maximums.

• Maximum Workout Time

This club selection is used to limit the maximum workout time the treadmill may be used

during a workout. The time may range from a minimum of 10 minutes to an absolute maxi-

mum of 240 minutes. The default from the factory is 60 minutes.

Procedure

1. Plug the power cord into the wall outlet, then turn on the treadmill with the circuit breaker.

2. If you wish to verify the measurement standard the treadmill is currently using continue with

the next step. If you wish to change the measurement standard the treadmill is using, skip to

Step 5.

Checking the Measurement Standard

3. Press ENTER until the WEIGHT indicator light appears.

4. Watch the number displayed in the left display window while you press the SPEED ▲key

five or six times.

Note:

If the treadmill is using United States standard units, the numbers in the left display window are

repeatable multiples of 5 (such as 160, 165, 170, 175, etc.). Otherwise, the treadmill is using

metric units.

C944 Treadmill

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Changing the Measurement Standard

5. With the PRECOR C944 banner scrolling, press the SPEED ▲and QUICK START/

CHANGE keys simultaneously or keys RESET,5,6,5,1,5,6,5, sequentially on units with

standard access codes. A message indicating the last selected units (either U. S.

STANDARD UNITS or METRIC UNITS) scrolls across the display.

6. Use the SPEED or INCLINE keys to select the alternate measurement standard.

Note:

Holding the INCLINE UP and CHANGE keys at the banner may cause the last selected units to

change if the INCLINE UP key is released before the CHANGE key.

Selecting Maximum Workout Speed

For PWM treadmills, the maximum workout speed limit is between either 1 and 12 MPH or 1 and

20 KPH. Maximum workout speed limits for SCR C944 treadmills range between 1 and 10 MPH

or 1 and 16 KPH.

7. With the last currently selected maximum speed displayed on the L.E.D. matrix, use the

SPEED or INCLINE keys to designate a workout speed limit. Press ENTER when the

desired speed appears.

Selecting Maximum Workout Time

8. With the last currently selected maximum time displayed on the L.E.D. matrix, use the

SPEED or INCLINE keys to designate a workout time limit. Press ENTER when the desired

time appears.

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