Motor Controller Comm Bad: Check Harness Between Lift; Motor Controller Comm Bad: Check Power To Motor Controller; System Configured Two Wired; Incline Inoperative - LifeFitness 9100 Service Manual

Life Fitness Models 9100, 9500HR, 9700HR, and 9700HR w/Decline Treadmills
TROUBLESHOOTING GUIDE
Malfunction
Display reads:
MOTOR CONTROLLER
COMM BAD: CHECK
HARNESS BETWEEN LIFT &
CONTROLLER -P9/P3
Display reads:
MOTOR CONTROLLER
COMM BAD: CHECK
POWER TO MOTOR
CONTROLLER.
Display reads:
WAX/LIFT BOARD COMM
BAD: CHECK POWER ON
LIFT
Display reads:
BOTH LIFT and
CONTROLLER COMM BAD:
CHECK HARNESS
BETWEEN CONSOLE & LIFT
-P1/P1
Display reads:
SYSTEM CONFIGURED TWO
WIRED
Display reads:
INCLINE INOPERATIVE –
CONTINUE IF DESIRED
Probable Cause
Loose wire harness.
Bad power entry module or
motor controller.
Bad Wax/ Lift PCB.
Loose wire harness.
Motor Controller is not jumped
correctly.
Level or negative switch.
Lift motor adjustment incorrect.
Lift Motor.
Corrective Action
Reset connections at wax/lift PCB connector
P9 and motor controller PCB connector P3.
Verify line voltage at P1 on the Motor
Controller. If voltage exists, replace motor
controller. See How To Replace... Motor
Controller.
If no voltage exists, replace power entry
module. See How To Replace...Power Entry
Module.
Verify if the LED 7 (Green) and LED 8 (Red)
is lit on the Wax/Lift PCB. If no, replace
Wax/Lift PCB. See How To Replace...Wax
/Lift PCB.
Reset connection at Wax/Lift PCB
connectorP1 and Display Console PCB
connector P1.
Reset jumper at JM1 on both pins.
Refer to the Diagnostics section "incline" to
verify the operation. If replacement is
required. See How To Replace...Level or
Negative Switch.
Inspect wire harness for damage, replace if
needed.
See "How To...Replace the Lift Motor" and
refer to the step in the procedure that
describes 13-3/4" tube adjustment.
Cycle motor in incline manual and verify
120VAC at P7 on Wax/Lift PCB. If not,
replace lift motor. See How To Replace...Lift
Motor.
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