Precor Experience 700 Series Service Manual page 282

platform to be jammed and it will also probably cause the MC lift fuse to blow. If
the lift moves as soon as the power is turned on and eventually jams, the MC
must be replaced. Refer to error code 44 for more information.
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. Dis-
connect 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 read-
ing will only be present before an error condition is displayed. A correct
reading 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
operate 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 not 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 242
Contact Precor Customer Support at support@precor.com or 800.786.8404 with
any questions.
7 Troubleshooting
System Troubleshooting Procedures
Page 272