Precor 9.17 Appendix page 21

9. Remove the P7 connector from the lower board. Using an ohmmeter, measure between
terminals 1 and 3 of P7, between terminals 1 and 2 of P7 and between terminals 2 and 3 of
P7. The measurements should be approximately 49.5Ω, 47.5Ω and 97Ω, respectively. If any
of the measurements are significantly low or high, replace the lift motor.
10. Re-insert the P7 connector in the lower PCA. Set the treadmill circuit breaker in the "on"
position. Using an AC voltmeter, monitor the voltage between terminals 1 and 2 (red and
white wires) of the P7 connector. Enter the manual program and press the INCLINE
The measurement should be approximately 120 Vac (line voltage). If the voltage is present
and the lift motor moves normally, skip to step 10. The voltage will only be present until such
time as an error occurs. If line voltage is not present skip to step 11. If line voltage is
measured but the motor does not move, replace the lift motor.
11. Monitor terminals 1 and 3 (white and black wires) of P7. Enter the manual program and
press the INCLINE
voltage). If the voltage is present and the lift motor moves normally skip to step 12. The
voltage will only be present until such time as an error occurs. If line voltage is measured but
the motor does not move, replace the lift motor.
12. If line voltage is not present in both steps 9 and 10, there are three parts that could cause
the problem. There are not any good tests to check these parts other than substituting a
known good part. They are lower PCA, ribbon cable and upper PCA. Replace only one part
at a time. If the new part does not correct the problem replace the original part.
13. If you have performed all of the above tests and the lift system is still not functioning, call
Precor Technical Support.
key. The measurement should be approximately 120 Vac (line
9.17, 917si Treadmill
key.
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