Precor TRM10/GEN06 Service Manual page 61

Figure 14: Lower Control Module Connector Numbering

With the incline above 0% (to allow room for lift travel down),
connect an AC voltmeter between terminals 1 (white) & 5 (black)
of the INCLINE connector. Set the treadmill in the manual program
and press the INCLINE  key. The AC voltmeter should read AC line
voltage (either 120VAC or 240VAC). Note that the AC line voltage
reading will only be present before an error condition is
displayed. A correct reading here verifies that the DOWN triac
switch is working properly.
o If either of these conditions fail, the lower control module
must be replaced.
4 The lift capacitor mounted inside the lift motor. If the lift
capacitor is shorted (0 W), the lift fuse will blow. The capacitor
may be checked by disconnecting the lift motor connector from the
lower control module and using an ohmmeter to measure between pins 5
& 6 of the lift motor connector.

If the capacitor is open or leaky it cannot be determined with an
ohmmeter. A leaky capacitor functions normally for light users,
while failing to move the lift for heavier users. An open
capacitor will not function at all and cannot be determined by an
ohmmeter, so the following test will determine if the capacitor
is bad.
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