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CHAPTER 2: Troubleshooting

2.3.2 TROUBLESHOOTING – NO RESPONSE FOR MACHINE When Pressing Start

SOLUTION:

a. Check if the console beeps when all keys are pressed. If no, replace the keypads

b. Enter Engineering Mode, and scroll to ENG 1 (Hardware Test). Press the “ENTER” key first and

then the key “START”.

- When press the key “SPEED + / -“, if the data on windows “TIME” & “DISTANCE” change,

the Console is ok. If not, replace the UCB.

c. Verify the motor or running belt spins freely - remove any obstructions from under the running

belt or motor compartment that may cause a block in movement.

d. Check the console cable connection. Also, console cable continuity can be tested with Ohms

on each wire of the cable.

e. Test the drive motor.

1. 30/50 series short test - Disconnect power from the unit. Remove the motor cover. Remove

the red and black motor wires from the MCB. Using a jumper wire (or metal paper clip), make

the connection between the red and black leads of the motor. Without the jumper wire, the running

belt will move freely with little to no resistance. With the jumper wire in place there will be a great

amount of resistance when trying to push the running belt. If there is resistance, the motor is good.

30/50 series battery test - Disconnect power from the unit. Remove the motor cover. Remove the

red and black motor wires from the MCB. Using a DC battery from a cordless drill or other device,

touch the red on the positive lead of the battery and the black to the negative lead. If the motor runs,

the motor is good.

2. 70 series windings test - Disconnect power from the unit. Remove the motor cover. Remove the

motor connection from the MCB. With an Ohm meter test the resistance level between the

motors three phases; pin 1 and pin 2, pin 1 and pin 3, then pin 2 and pin 3. If all three resistance

levels are the same, the motor is good. If one or more are different, replace the motor.

f. If the drive motor is ok. Then,

- Check the connection of the speed sensor (encoder disk group) at the MCB.

- Remove the speed sensor from the motor and clean it, then re-test.

- If the speed sensor is clean and has a good connection but still will not operate, replace the speed

sensor.

- Replace the MCB as the last step if machine does still not run after to take above actions.

Matrix T70 Service Manual

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