Precor C966i User manual

C956i, C966i (Gen 06) Treadmill
Page 1
C956i, C966i Treadmill
Warning: This service manual is for use by Precor trained service providers only.
If you are not a Precor Trained Servicer, you must not attempt to service any Precor Product;
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.
© 2006 Precor Incorporated
Unauthorized Reproduction and Distribution Prohibited By Law
20077-111

C956i, C966i (Gen 06) Treadmill
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Section One - Things you Should Know
About This Appendix
The C956i, C966i (Gen 06) incorporate new drive motor system and display systems. The drive
motor is a three phase AC motor. The drive motor controller converts a single phase AC input
into three phase motor control.
Section One, Things You Should Know. This section includes technical specifications. Read
this section, as well as the C956i, C966i Treadmill Owners Manual, before you perform the
maintenance procedures in this manual.
Section Two, Software Features. Precor’s C956i, C966i 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 C956i, C966i Treadmills.

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Safety guidelines you should know and follow include:
• Read the owner’s manual and follow all operating instructions.
• Operate the treadmill on a solid, level surface.Visually check the treadmill before beginning
service or maintenance operations. If it is not completely assembled or is damaged in any
way, exercise extreme caution while operating and checking the treadmill.
• When operating the treadmill, do not wear loose clothing. Do not wear shoes with heels or
leather soles. Check the soles of your shoes and remove any embedded stones. Tie long
hair back.
• Do not rock the unit. Do not stand or climb on the handlebars, display enclosure, or cover.
• Do not set anything on the handlebars, display enclosure, or cover. Never place liquids on
any part of the treadmill, while performing service.
• To prevent electrical shock, keep all electrical components away from water and other
liquids.
• Do not use accessory attachments that are not recommended by the manufacturer-such
attachments might cause injuries.
•
• Removing the hood exposes high voltage components and potentially dangerous
machinery. Exercise extreme caution when you perform maintenance procedures with the
hood removed.

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General Information
For the latest exploded view diagram, part number and part pricing information, visit the Precor
dealer website at “www.precor.com/connection.

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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
• Machine Test
Belt Speed
Incline
Procedure
1. Plug the power cord into the wall outlet, then turn on the treadmill with the circuit breaker.
2. Using the RESET key and the numeric keypad, press keys RESET,5,1,7,6,5,7,6,1,
sequentially.
3. Hardware Validation will scroll across the display followed by DISPLAY TEST.
Diagram 2.1 - C956i, C966i Treadmill Display
Numeric Keypad
Reset Key
OK Key
Back Key

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4. Press the OK key, the upper most group of LED’s will illuminate on the display. Check the
display to ensure that all LED segments are illuminated.
5. Press the OK key four more times to display the remaining LED groups. Check each display
group to ensure that all LED segments are illuminated.
6. Press the BACK key then the key, KEYBOARD TEST will scroll across the display.
7. Press the OK key, a representation of all of the keys on the console will be displayed.
Pressing a key on the console will cause the representation of that key to go off. Press all of
the keys on the console to ensure that all of the keys are functioning.
8. Press and hold the BACK key then the key, HEART RATE will be displayed.
9. Grasp both of the heart rate grips on the handlebar, after a couple of seconds the heart rate
will be displayed in the heart rate and smart rate displays.
10. Use chest strap transmitter or a test transmitter to test the wireless heart rate function, after
a couple of seconds the heart rate will be displayed in the heart rate and smart rate displays.
11. Press the BACK key then the key, MACHINE TEST will scroll across the display.
12. You may now proceed to either the belt speed test or the incline test. Press the key once
to access the belt speed test or twice to access the incline test.
13. BELT SPEED test. Press the OK key, the console will display the power bits (PWRB), Press
the SPEED key to start the treadmill running belt, the display will indicate the power bits,
the elapsed time and the actual speed (in either miles per hour or kilometers per hour
depending on the club parameters setting, see Procedure 2.3).
14. Press the key, the console will display the motor current (AMPS), the elapsed time and
the actual speed.
15. Press the BACK key to exit the belt speed test.
16. INCLINE test. The console will display the analog to digital (A/D) incline position number
and the incline position in percent of incline. Press the inline ,keys to operate the incline
through out its range.
17. Press the BACK key to exit the incline test.
18. Press the RESET key to exit the hardware validation test.

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Procedure 2.2 - Displaying Information
The information display will access the following data;
• Odometer
• Hour Meter
• U-Boot Software
• U-Base Software
• Lower Software
• Serial Number
• Usage log
• Error Log
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. DIAGS-INFORMATION DISPLAY will scroll across the display.
4. Use the ,keys to move to the desired display shown in the list above.
5. ODOMETER display. Press the OK key.
6. The odometer will be displayed as 1234567 MILES or 1234567 KM depending on club
parameter settings (See Procedure 2.3). The odometer is also used to provide the “distance
stamp” for the error code log
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.
7. Press the BACK key to exit the odometer display.
8. HOUR METER display. Press the OK key.
9. 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.
10. Press the BACK key to exit the hour meter display.
11. U-BOOT SW display. This display the installed version of upper boot software. The boot
software is used to upload new software into the upper display PCA.
12. Press the OK key. The software part number will be displayed as XXXXX-XXX.

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13. Press the BACK key to exit the U-Boot SW display.
14. U-BASE SW display. This display the installed version of upper PCA software.
15. Press the OK key. The software part number will be displayed as XXXXX-XXX.
16. Press the BACK key to exit the U-Base SW display.
17. LOWER SW display. This display the installed version of lower PCA software.
18. Press the OK key. The software part number will be displayed as XXXXX-XXX.
19. Press the BACK key to exit the lower SW display.
20. SER. NUMBER display. Press the OK key.
21. The treadmill’s serial number will be displayed. The serial number may be incorrect or not
displayed if the upper PCA has been replaced.
22. Press the BACK key to exit the serial number display.
23. USAGE LOG display. Press the OK key.
24. Use the ,keys to move through the list of programs. A message will scroll describing the
program, the number of times and the number of minutes the program was used.
25. Press the BACK key to exit the usage log display.
26. ERROR LOG display. Press the OK key, the quantity of errors in the log will be displayed.
27. Press the OK key, the most recent error will be displayed first.
28. Use the ,keys to move through the list of errors. The error messages will list the error
name, the odometer reading when the error occurred, the hour meter when the error
occurred and the drive motor current reading when the error occurred.
29. If you wish to clear the error log, press and hold the QUICK START key. The message
HOLD TO CLEAR ERRORS will be displayed. The error log will be cleared when the
message NO ERRORS is displayed.
30. Press the RESET key to exit the information display.
31. Please note that the ERROR LOG may also be accessed at any time by pressing and
holding the RESET key for four seconds. If the error log does not contain any errors, the
message STUCK KEY will be displayed.

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Procedure 2.3 - Setting Club Parameters
This procedure allows you to change the following club settings:
• Safety Code
• Select Language
• Select Units
• Set Max Workout Time
• Set Max Pause Time
• Set Cool Down Time
• Set Speed Limit
• Set Incline Limit
• Hidden Programs
• Remote Speed Control
• Set Custom Program 1
• Set Custom Program 2
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.
3. Use the ,keys to move to the desired display shown in the list above.
4. DIAGS-SET CLUB PARAMETERS will scroll across the display.
5. SAFETY CODE display. The safety code, when enabled, makes the user enter a password
in order to start the treadmill. Press the OK key.
6. Use the ,keys to toggle between ENABLED and DISABLED.
7. Press the BACK key to exit the safety code display.
8. SELECT LANGUAGE display. Press the OK key.
9. Use the ,keys to toggle between the available languages.
10. Press the BACK key to exit the select language display.
11. SELECT UNITS display. Press the OK key.
12. Use the ,keys to toggle between U.S (miles per hour) and METRIC (kilometers per
hour).
13. Press the BACK key to exit the set units display.

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14. SET MAX WORKOUT TIME display. Press the OK key.
15. Use the ,keys to select the maximum time a user can remain in a program.
16. Press the BACK key to exit the set max. workout time display.
17. SET MAX PAUSE TIME display. Press the OK key.
18. Use the ,keys to select the maximum time a program will remain in the pause mode.
19. Press the BACK key to exit the set max. pause time display.
20. SET COOL DOWN TIME display. Press the OK key.
21. Use the ,keys to select the cool down time.
22. Press the BACK key to exit the set cool down time display.
23. SET SPEED LIMIT display. Press the OK key.
24. Use the ,keys to select the maximum allowable treadmill speed.
25. Press the BACK key to exit the set speed limit time display.
26. SET INCLINE LIMIT display. Press the OK key.
27. Use the ,keys to select the maximum allowable incline setting.
28. Press the BACK key to exit the set incline limit time display.
29. HIDDEN PROGRAMS display. Press the OK key.
30. Use the ,keys to toggle between HIDE PROGRAMS and SHOW PROGRAMS.
31. Press the BACK key to exit the hidden programs display.
32. REMOTE SPEED CONTROL display. Remote speed control allows the treadmill speed to
be controlled by an external source such as InSite. Press the OK key.
33. Use the ,keys to toggle between ENABLED and DISABLED.
34. Press the BACK key to exit the remote speed control display.
35. SET CUSTOM PROGRAM 1 display. Allows programing of the custom program 1. Follow
the instructions scrolling on the display to program the custom course. Use the ENTER key
to save changes and exit or the BACK to exit without saving changes.