Precor C954 Serivce Manual page 23

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 & 3 of the J5 connector. See Diagram 5.2.
Set the treadmill in the manual program and press the LIFT
should read AC line voltage (either 120 Vac or 240 Vac) and the green 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 green 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 green 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 J5 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 15 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 J1 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 J5 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
should be approximately 15 Ω, 15 Ω and 30 Ω (120Vac units) 30 Ω, 30 Ω and 60 Ω (240Vac
units), 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
1 & 3. The readings
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