Precor TRM10/GEN06 Service Manual page 62

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With the incline below 15% (to allow room for lift travel),
connect an AC voltmeter between terminals 5 (black) & 6 (red) of
the INCLINE connector. See Figure above and below. Set the
treadmill in the manual program and press the INCLINE  key. The
AC voltmeter should read between 1.5 to 2.0 times the AC line
voltage. If this reading is significantly low, replace the lift
motor. Note that the AC line voltage reading will only be present
before an error condition is displayed.
o If the capacitor is bad the lift motor must be replaced.
5 If a lift motor winding is bad, the lift will not operate in one or
both directions depending on the exact fault in the motor.
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