Precor C966i Service 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
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20077-111

Precor C966i Specifications

Power and Motor

motor power	4.0 hp continuous duty
power requirements 120v	120 v @ 50/60Hz 20 Amps
power requirements 240v	240v @ 50/60Hz 20 Amps

Performance

speed range	0.5 to 16 mph (1 to 26 kph)
incline range	-3% to 15% grade

Weight and Dimensions

length	86 inches (218 cm)
width with handrails	37 inches (93 cm)
width without handrails	34 inches (86 cm)
height	59 inches (150 cm)
weight	375 lbs (170 kg)
shipping weight	470 lbs (213 kg)
running surface	60 inches x 20 inches (153 cm x 51 cm)

Summary

Section Two, Software Features

Procedure 2.1 - Accessing the Diagnostic Software

Procedure 2.4 - Documenting Software Problems

Guides users on recording critical information for software issues on the treadmill PCA.

Section Three - Checking Treadmill Operation

Checking Treadmill Operation Procedure

Section Four, Inspection and Adjustment Procedures

Procedure 4.1 - Calibrating the Incline Motor

Step-by-step instructions to calibrate the incline motor, ensuring accurate incline positioning.

Procedure 4.2 - Adjusting Drive Belt Tension

Section Five, Troubleshooting Procedures

Procedure 5.1 - Troubleshooting the Keypad and Upper PCA

Diagnoses issues with the treadmill's keypad, display face, and upper PCA components.

Procedure 5.2 - Troubleshooting the Incline System

Troubleshooting the incline motor, wiring, and power control module for system errors.

Procedure 5.4 - Troubleshooting the External A.C. Power Source

Ensures proper power connection, verifying dedicated 20 amp circuits and voltage levels.

Procedure 5.5 - Troubleshooting the 3 Phase AC Drive Motor System

Diagnoses the 3-phase AC drive motor, power control module, and output connections.

Section Six, Replacement Procedures

Procedure 6.1 - Replacing the Incline Motor

Procedure 6.3 - Replacing the Power Control Module

Procedure 6.4 - Replacing Drive Motor

Procedure for replacing the main drive motor, including belt tensioning.

Procedure 6.10 - Replacing the Upper PCA

Detailed steps to replace the upper PCA in the treadmill display assembly.

Procedure 6.14 - Replacing the Display Face

Section Seven, Technical Diagrams and Parts Lists

Wiring Diagram 7.1 - C956i, C966i 120 Vac

Illustrates the electrical connections for the 120 Vac C956i/C966i treadmill.

Block Diagram 7.2 - C956i, C966i 120 Vac

Wiring Diagram 7.3 - C956i, C966i 240 Vac

Block Diagram 7.4 - C956i, C966i 240 Vac