TROUBLESHOOTING
Console and Motor System
Four components make up the console and motor system; FAST TRAC FITNESS COMPUTER, mounted on the
console, INTERFACE BOARD, mounted on the bottom motor cover, MOTOR CONTROLLER and MOTOR mounted
to the front right rail.
Console
The CONSOLE contains the FAST TRAC FITNESS COMPUTER which controls the speed and elevation of the
treadmill. It also displays time, speed, distance (miles and laps), calories, and pulse.
The time willdisplay from 0:00 to 99:00 inone minute increments. The speed will read between .5 and 10.0 at .1 MPH.
The distance is indicated in miles (0 to 49 3/4) and laps (0 to 199). The calories will be displayed from 0 to 990 in 10
calorie increments.The pulse displays your heart rate from 90 to 180 in 1 beat per minute increments. The time,
distance, calories, and pulse desired can be programmed into the fitness computer.

Interface Board

The interface board is an electronic circuitboard mounted to the bottom motor cover- see FIGURE 3. With the treadmill
plugged in and the power key inserted the DC voltage from PI to N on the interface board should be 13.6 VDC. The
voltage from P2 to N will vary withthe speed;
0 MPH - 0 VDC
.5 MPH - .68 VDC
10.0 MPH - 12.3 VDC
The voltage across the capacitor, Cl, should be 9.56 VDC. When the treadmill is running at.5 MPH the motor should
maintain 250 RPM, at 10.0 MPH themotor should maintain 5200 RPM.

Motor Controller

The motor controller is an electronic circuitboard mounted to the right rail infront of the motor -see FIGURE 4. From
a grounded wall outlet the motor controller receives 120 VAC and converts it to variable DC 0 to 90 V. The monitor
and interface board adjustthe output ofthe motor controllerfrom 0 to 90 volts.The motor controller senses the motor
speed by the tachometer. The tachometer on the motor tellsthe motor controller itsspeed. If a load is placed on the
treadbelt the motor controller compares the set point of the speed control to the tachometer and makes adjustments
to the DC output voltage to the motor keeping the treadbelt running at a fixed speed. For example, the output voltage
will be 9.5 volts at .5 MPH, as a person steps on the treadbelt the output voltage increases to compensate for the
extra motor loading, keeping the treadbelt running at .5 MPH.
Motor
This treadmill uses a2HP DC motor - see FIGURE 5. When the voltage to a DC motor is changed the speed will
varyaccordingly. The motor receives 0-90 VDC from the motorcontroller. The voltage from M1 to M2while the treadmill
is running at 10.0 MPH should not exceed 90 VDC andthe shouldbe turning at5200 RPM. The motor has an integral
tachometer which tellsthe motor controller the motor'sspeed. The tachometer consistsof a coil ofwire insidea plastic
housing. Apermanent magnet mounted to the motor, behindthe fan, rotates inside thetachometer coil generating a
low voltage, proportional to the motor speed.
.66 VAC -250 RPM
9.40 VAC -5200 RPM
The tachometer coil should be 300 ohms 25 ohms.
Note: The tachometer can be measured with an ohmmeter only when disconnected from the motor controller.
The winding resistance should bevery low,approximately 1 ohm. Testeach winding inthe armature (the rotatingpart
inside the motor) by slowly rotating the motor shaft 1 complete revolution. All windings should be less than 2 ohms.
Note: The windings of the motor can bemeasured with an ohmmeter only when disconnected from the motor
controller.
9