Precor Energy Series Service Manual page 19

the problem is probably in the lower PCA. Replace the lower PCA.
7. If the voltage reading in step 4 was correct and incline motor did not move, the problem is
probably the incline motor. To verify the lift motor's condition, remove power from the treadmill
and measure between terminals 1 and 2 of JK4 with an ohmmeter. The motor winding should
measure approximately 27 ohms. If the measurement is significantly high, replace the incline
motor.
8. Connect an AC voltmeter between terminal 2 (white wire) and terminal 3 (black wire) of the
JK4 connector on the lower PCA. Press the INCLINE DWN key. The DOWN LED should
illuminate and the AC voltmeter should read AC line voltage (105 to 120 VAC)
9. If the display indicated that the incline should be moving downwards and the DOWN LED did
not illuminate the problem is probably in the data cable between the upper and lower PCA.
Replace the data cable.
10. If the DOWN LED illuminated and the AC voltage reading in step 8 was absent or significantly
low, the problem is probably in the lower PCA. Replace the lower PCA.
11. If the voltage reading in step 8 was correct and incline motor did not move, the problem is
probably the incline motor. To verify the lift motor's condition, remove power from the treadmill
and measure between terminals 2 and 3 of JK4 with an ohmmeter. The motor winding should
measure approximately 27 ohms. If the measurement is significantly high, replace the incline
motor.
12. If you have performed all of the procedures above and have been unable to correct the
problem, call Precor customer support.
13. Remove Jk3 connector from the lower PCA. With an ohmmeter, measure between pins 1 and
3 of JK3 (red and black wires). You should measure approximately 10 K ohm (10000 ohms).
14. With an ohmmeter, measure between pins 1 and 2 of JK3 (red and white wires) and measure
between pins 2 and 3 of JK3 (white and black wires). These two measurements should total
10K ohms when added together. If these three measurements in steps 13 and 14 are correct
the incline should be functioning normally, replace JK3 and re test incline operation. If any of
the three measurements were significantly incorrect continue with step 15.
15. Remove the screw that fasten the cover on the top of the incline motor and carefully lift the
cover off of the incline motor. Check the wire connections on the incline potentiometer to
ensure they are securely connected to the incline potentiometer.
9. Repeat the three ohmmeter measurements in steps 13 and 14 directly on the three terminals
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