Precor Energy Series Service Manual page 38

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 treadmill's circuit breaker in the "OFF" position and remove the AC line cord from the
AC outlet. Remove the lift motor connector from the JK4 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  If either reading is open or very high resistance,
replace the lift motor per Procedure 6.1.
11. Set the treadmill's circuit breaker in the "OFF" position and remove the AC line cord from the
AC outlet. Remove the lift motor connector from the JK3 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 10 K. The sum of the two readings between
terminals 2 & 3 and 1 & 2 should total approximately 10 K If either reading is open or very
high resistance, replace the lift motor per Procedure 6.1.
12. Set the treadmill's circuit breaker in the "OFF" position and remove the AC line cord from the
AC outlet. Remove the lift motor connector from the JK4 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  12  and 24  respectively If the reading is significantly low, replace
the lift motor per Procedure 6.1.
13. If the resistance readings in step 13 are normal, replace the lower logic PCA per Procedure
6.3.
14. If you have performed all of the procedures above and have been unable to correct the
problem, call Precor customer service.
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