Precor Experience 700 line Series Service Manual page 218

b. An open MC lift switch will cause the lift to only move in one direction. Perform the
following steps to determine if the switch is open:
i. Move the incline below 15% to allow room for lift upward travel. Disconnect
the MC LIFT connector and connect an AC voltmeter between terminals 4
(white) & 7 (red) of the MC LIFT connector (see lift motor schematic).
Select the manual program mode and press the INCLINE UP control. 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 verifies that the lift UP switch is
working properly. If the UP switch test failed, replace the MC.
ii. Move the incline above 80% to allow room for lift downward travel. Con-
nect an AC voltmeter between terminals 4 (white) & 8 (black) of the MC
LIFT connector. Set the treadmill in the manual program and press the
INCLINE DOWN control. The AC voltmeter should read the 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 read-
ing verifies that the DOWN switch is working properly. It the DOWN lift
switch test fails, replace the MC.
c. If the MC lift switch is good, then the lift motor winding is bad. The lift will not oper-
ate in one or both UP/DOWN directions depending on the exact fault in the
motor, replace the lift motor.
7. If the lift system does not work after performing the previous troubleshooting tests,
remove the bad lift motor and place on the floor in front of the treadmill. Substitute a
known good lift motor. Make sure the MC Lift fuse is good and then verify incline oper-
ation.
a. If the good lift motor works, replace the original bad lift motor.
b. If the good lift motor does no work. replace the MC module.
CAUTION: Do NOT substitute MC modules or the replacement MC could be dam-
aged.
See Also
"System Troubleshooting Procedures" on page 181
Contact Precor Customer Support at support@precor.com or 800.786.8404 with
any questions.
7 Troubleshooting
System Troubleshooting Procedures
Page 209