Precor C954 Serivce Manual page 35

4. Insert the treadmills line in the AC outlet and set the circuit breaker in the "on" position. Set
the treadmill in the manual program and press the LIFT
normally, test treadmill operation per Section 3. If the lift motor still does not operate, retest
the lift fuse per steps 2 & 3. If the fuse is open again, continue with step 13. If the fuse is
good continue with step 5.
5. Connect an AC voltmeter between terminals 1 & 4 of the J1 connector. See Diagram 5.2.
Set the treadmill in the manual program and press the LIFT
should read AC line voltage (120 Vac) and the red UP LED should illuminate. Note that the
AC line voltage reading will only be present before an error condition is displayed.
6. If the F2 fuse is good and the UP LED illuminates and the AC voltmeter does not read the
presence of AC line voltage replace the lower PCA per Procedure 6.3.
7. If the UP LED does not illuminate and the display indicates that the lift should be moving
upward, replace the upper PCA per Procedure 6.8.
8. If the AC voltmeter reads the presence of AC line voltage and an error 40 is displayed, go to
step 10.
9. If the AC voltmeter reads the presence of AC line voltage and an error 42 is displayed,
continue with step 11.
10. Set the treadmills circuit breaker in the "off" position and remove the AC line cord from the
AC outlet. Remove the lift motor connector from the J1 connector on the lower PCA.
Visually. inspect the lift motor connector for broken or improperly crimped connections.
Using an ohmmeter, read the resistance between terminals 1 & 4 and between terminals
3 & 4. Both readings should be approximately 12 Ω. If either reading is open or very high
resistance, replace the lift motor per Procedure 6.1.
11. Set the treadmills circuit breaker in the "off" position and remove the AC line cord from the
AC outlet. Remove the lift motor connector from the J7 connector on the lower PCA. Visually
inspect the lift motor connector for broken or improperly crimped connections. Using an
ohmmeter, measure between terminals 1 & 3, 1 & 2 and 2 & 3 of the lift motor connector.
Terminals 1 and 3 should read approximately 1 KΩ. The sum of the two readings between
terminals 2 & 3 and 1 & 2 should total approximately 1 KΩ. If either reading is open or very
high resistance, replace the lift motor per Procedure 6.1.
12. If you have performed all of the procedures above and have been unable to correct the
problem, call Precor customer service.
13. Set the treadmills circuit breaker in the "off" position and remove the AC line cord from the
AC outlet. Remove the lift motor connector from the J1 connector on the lower PCA. Visually
inspect the lift motor connector for broken, frayed or improperly crimped connections. Using
an ohmmeter, read the resistance between terminals 1 & 4, 3 & 4 and 1 & 3. The readings
should be approximately 12 Ω, 12 Ω and 24 Ω, respectively. If the reading is significantly low,
replace the lift motor per Procedure 6.1.
20077-107
C954, C956 Treadmill
key. If the lift motor operates
key. The AC voltmeter
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