Precor C954 Gebrauchsanweisung

C954, C956 Treadmill

20077-107 Page 1

C954, C956 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

2007-107

C954, C956 Treadmill

Page 1-2 Page 2

Section One -

Things you Should Know

About This Appendix

The C954 and C956 have been manufactured in three versions. When servicing a C954 or C956

it is critical that you are aware of which version of version you are servicing. The differences in

the versions may greatly impact service requirements and procedures. For convenience, the

versions detailed below will be referred to as version 1, version 2 or version 3 in the reminder of

this service manual. Any procedures that do not reference a specific version is applicable to all

versions of the C954 or C956.

Versions 1 & 2 were manufactured between March 2000 and August 5, 2002. Units

manufactured prior to July 2, 2001 are version 1 and units manufactured after July 1, 2001 are

version 2 units. Version 1 & 2 units were manufactured under serial codes 58, 6D, 6E, 6J, 6P, 6R,

6V, 6W, 7B, AA, AQ & CL.

Version 3 was manufactured between August 5, 2002 and the present. Version 3 units were

manufactured under serial codes, IS, IT & KE.

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

this section, as well as the C954,C956 Treadmill Owners Manual, before you perform the

maintenance procedures in this manual.

Section Two, Software Features. Precors C954 & C956 Treadmills are 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 the C954 & C956 Treadmills.

C954, C956 Treadmill

20077-107 Page 3

General Information

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

dealer website at “www.precor.com/Dealer.

Technical Specifications

Physical Specifications

Length: 84 inches (213 cm.)

Width: Handrails 36.75 inches (93 cm.)

Base 33.75 inches (86 cm.)

Height: 55 inches (140 cm.) version 1 & 2

Height: 57 inches (145 cm.) version 3

Running surface: 26 inches by 60 inches (51 cm. by 152 cm.)

Motor: 2 hp. continuous duty DC

Speed: 0.5 to 12 m.p.h. (0.8 to 19 k.p.h.)

10 m.p.h. is equivalent to a 6 minute mile

Incline: 0% to +12% grade

Power: 120 Vac 50/60 Hz @ 20 amp

240 Vac 50/60 Hz @ 20 amp

Weight: 350 lbs (158 kg.)

Shipping Weight: 460 lbs (207 kg.)

C954, C956 Treadmill

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Procedure 2.1 - Accessing the Diagnostic Software

The treadmill's diagnostic software consists of the following modes:

• Display Test

• Keyboard Test

• Heart Rate Test

• Lift Test

• Belt Speed Test

• Belt Power Test

• Circuit Breaker Test

Procedure

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

2. The keys on the display are hypothetically numbered 1 to 7 from left to right. See Diagram

2.1. The STOP is key number 4 and is located directly below the QUICK START key (not

shown in Diagram 2.1). The QUICK START key is not part of the numbering sequence.

Note: The numeric keys may also be used for the all keys in the access sequence except

for the RESET key.

3. With the PRECOR banner scrolling, press keys RESET,5,1,7,6,5,7,6,1, sequentially.

4. Watch the electronic display as the display test progresses. This test illuminates all of the

LEDs on the display. If all of the LEDs do not illuminate,replace the upper PCA per

Procedure 5.2 of the Commercial Treadmill Service Manual.

5. Press the STOP or ENTER key to proceed to the keyboard test.

Diagram 2.1 - C956 Treadmill Display

Key #7

Key #4

Reset/Key #1

Numeric

Keypad

C954, C956 Treadmill

20077-107 Page 5

6. The keyboard test will place two dots on the display for each key on the display, including

the numeric keypad. Pressing a key will cause the upper of the two dots associated with the

key to go out. Test all of the keys in this manner. Tug on the safety key lanyard, to ensure

that the STOP key is activated.

7. Press and hold the STOP key or ENTER key to proceed to the heart rate test.

8. The heart rate test will display the heart rate being received during this test from either a

chest strap transmitter or test transmitter.

9. Three heart rate values will be displayed. They will be prefixed “U” for unfiltered, “F” for

filtered and “P” for Polar filtering. The Polar filtered heart rate will also appear in the normal

heart rate display, since Polar filtering is the filtering used during normal operation. The right

most red LED in the smart rate display will flash each time a heart beat is detected.

Note: If there is not a heart rate receiver installed or there is a bad or intermittent connection

between the heart rate receiver and the upper PCA, the messages in step 9 will be

replaced by the message NO HEART RATE RECEIVER.

10. Press the STOP or ENTER key to proceed to the lift test.

11. Two numbers will be displayed, the percent of lift and A/D number related to the current lift

position. The A/D (analog to digital) number represents the lift potentiometer reading. The A/

D number will be in the range of 0 to 255.

12. The lift may be operated using the INCLINE keys. The incline percentage and A/D numbers

will change accordingly. Care must be taken while operating the lift in this mode because the

normal upper and lower range limits are not in effect. It is possible to operate the lift to its

physical limits and may cause the lift motor to jam.

13. The A/D reading will be used later in this service manual to calibrate the lift.

14. Press and hold the STOP or press the ENTER key to proceed to the belt speed test.

15. The speed of the running belt is controlled by the SPEED keys during this test.

16. The following values are displayed; time (that the running belt has operated during this test),

current (in amps through the drive motor), belt speed (in MPH) and power bits (PWM value).

17. This test is valuable in diagnosing treadmill load conditions such as running bed and/or

running belt condition. As load is increased, the speed is kept at a constant value (as set via

the SPEED keys) and the current and power bits will vary proportionately to the load.

18. It is suggested that you perform this test on a treadmill known to be in excellent operating

condition. Note the values displayed at a fixed speed (such as 3 MPH) and your body

weight. Those values may then be used to benchmark the operation of treadmills you are

diagnosing.

19. Press and hold the STOP or press the ENTER key to proceed to the belt power test.

C954, C956 Treadmill

Page 1-6 Page 6

20. The belt power test is similar to the belt speed test except that the SPEED keys control the

power bits (PWM value) instead of the belt speed.

21. The same (see step 16) values will be displayed as in the belt speed test.

22. This test is valuable in diagnosing treadmill response to load conditions. As load is

increased, the power bits are kept at a constant value (as set via the SPEED keys) and the

current and belt speed will vary proportionately to the load.

23. It is suggested that you perform this test on a treadmill known to be in excellent operating

condition. Note the values displayed at a fixed power bit reading (as set by the SPEED

keys) and your body weight. Those values may then be used to benchmark the operation of

treadmills you are diagnosing.

24. Press and hold the STOP or press the ENTER key to proceed to the fan test.

25. This test displays the operating speed of the drive motor cooling fan in RPM. If the fan

speed is less than 1000 RPM, the fan should be replaced.

26. Press the STOP or the ENTER key to proceed to the circuit breaker test.

27. The message HOLD ARROW KEY TO TRIP will be displayed. When the arrow key is held,

the message BREAKER WILL TRIP 3 2 1 will flash on the screen one word at a time.

Shortly after the 1is displayed, the circuit breaker will trip. If the arrow key is released before

the circuit breaker trips, the test will be terminated.

28. The circuit breaker test is the last test in the diagnostics routine. If you do not wish to cause

the circuit breaker to trip, press the RESET, STOP or the ENTER key to exit the diagnostics

routine.

C954, C956 Treadmill

20077-107 Page 7

Procedure 2.2

- Displaying Information

The information display will access the following data;

• Odometer

• Hour meter

• Software version

• Error log

• Serial Number (version 3 only)

Procedure

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

2. With the PRECOR banner scrolling, press the keys RESET,6,5, sequentially.

3. The treadmills odometer will be displayed as 1234567 MPH or 1234567 KPH depending on

club settings (See Procedure 2.3).

Note: The odometer data is stored in non-volatile memory on the upper PCA. If the upper PCA

is replaced the odometer data will be lost.

4. Press the STOP or the ENTER key to proceed to the hour meter display.

5. The operating time of the unit will be displayed as 12345 HOURS. The operating time is

defined as total amount of time that the unit has operated in program modes with the drive

motor running. The hour meter is also used to provide the “time stamp” for the error code

log.

6. Press the STOP or the ENTER key to proceed to the software version display.

7. The software versions of the upper and lower PCAs will be displayed as;

UPPER 1.01 LOWER 1.01.

8. Press the STOP or the ENTER key to proceed to the error log.

9. The error log will store up to 10 error conditions. The errors are logged with the most recent

error in position one. When a new error condition occurs, each existing error is pushed down

one position in log. If there was an error in position 10 when a new error was logged, the

error that was in position 10 will be lost.

10. Each error in the log will show the odometer reading (in miles) and the time (hour meter)

when the error occurred. The errors are displayed as;

1 ER20 1234567 MI 12345 HRS.

11. The arrows keys will allow you to scroll through the log. When the first unused position is

reached in the log, the message NO MORE ERRORS will be displayed.

C954, C956 Treadmill

Page 1-8 Page 8

12. When the QUICK START key is held for 2 seconds the message HOLD TO CLEAR

ERRORS will be displayed. If the QUICK START key is held for an additional 2 seconds, the

message CLEARED will be displayed. When the QUICK START key is released the

message NO MORE ERRORS will be displayed and all error are erased from the log.

13. Press the STOP or the ENTER key to proceed to the serial number (version 3, only).

Version 1 & 2 units will skip to step 15.

14. The units serial number will be displayed.

15. Press the RESET, STOP or the ENTER key to exit the information display.

C954, C956 Treadmill

20077-107 Page 9

Procedure 2.3 - Selecting Club Settings

This procedure allows you to change the following club settings:

• Language

• Measurement Units

• Maximum Speed

• Maximum Workout Time

• Maximum Pause Time

• Cool Down Time (version 3, only)

• Modify Custom Courses

Procedure

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

2. With the banner scrolling, press keys RESET,5,6,5,1,5,6,5, sequentially.

Selecting Language

3. The prompt SELECT LANGUAGE will be displayed. The currently selected language will

then be displayed.

4. Use the , keys to scroll through the available languages.

5. Press the ENTER key to select the currently displayed language or the STOP key to leave

the original language selected.

Select Measurement Units

6. The prompt SELECT UNITS will be displayed. The currently selected measurement unit will

then be displayed.

7. Use the , keys to scroll through the available measurement units.

8. Press the ENTER key to select the currently displayed measurement unit or the STOP key

to leave the original measurement unit selected.

Select Maximum Speed

9. The prompt SET MAX SPEED will be displayed. The currently selected maximum speed will

then be displayed in either MPH or KPH depending upon the measurement units selected.

10. Use the , keys to scroll through the possible range of maximum speeds.

C954, C956 Treadmill

Page 1-10 Page 10

11. Press the ENTER key to select the currently displayed maximum speed or the STOP key to

leave the original maximum speed selected.

Select Maximum Workout Time

12. The prompt SET MAX WORKOUT TIME will be displayed. The currently selected maximum

workout time will then be displayed.

13. Use the , keys to scroll through the possible range of maximum workout times. It is

possible to select NO LIMIT as the maximum workout time. When NO LIMIT is selected, the

user is allowed an infinite workout time.

14. Press the ENTER key to select the currently displayed maximum workout time or the STOP

key to leave the original maximum workout time selected.

Select Maximum Pause Time

15. The prompt SET MAX PAUSE TIME will be displayed. The currently selected pause time

will then be displayed.

16. Use the , keys to scroll through the possible range of pause times. The maximum

pause time is the amount of time the treadmill remains in pause mode before the course is

terminated and the banner is displayed.

17. Press the ENTER key to select the currently displayed pause time or the STOP key to leave

the original pause time selected.

Select Cool Down Time

(version 3, only)

18. Version 1 and 2 units will skip to “Modify Custom Courses”.

19. The prompt SET COOL DOWN will be displayed. The currently selected cool down time will

then be displayed.

20. Use the , keys to scroll through the possible range of pause times. The cool down time

is the amount of time the treadmill remains in the cool down mode before the course is

completed.

21. Press the ENTER key to select the currently displayed cool down time or the STOP key to

leave the original cool down time selected.

Modify Custom Courses

22. The prompt MODIFY CUSTOM COURSE 1 will be displayed. The currently stored custom

course will then be displayed. The left most column of the course blinks, indicating that it is

the column selected for modification.

23. The SPEED & SPEED  keys to change the column selected for modification.The

INCLINE & INCLINE  keys to change the incline of the selected column.

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