T
ROUBLESHOOTING
Table of Contents
7.0AT-03
27
Service Manual
- If the resistance is bigger than 10 Ω, the drive motor is defective. Replace the drive motor.
- If the resistance is lower than 10 Ω, 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 still does not run after taking above actions.
Incline Motor Issue
SOLUTION:
A. Press the "INCLINE" keys, the console should beep and display incline change, if no, replace the
key pad.
B. Enter Engineering Mode, and scroll to ENG 1 (Hardware Test). Press the “push to select” key
first and then the “START” key.
C. Roll forward/backward to increase/decrease incline the “Incline scroll wheel”.
- If can hear clicks from two relays at the MCB, the MCB is ok. Then check the connection of the
elevation motor at the MCB first, try to unplug and re-plug. If this does not resolve the issue, replace the
elevation motor.
- If there is no clicks from these two relays, MCB is defective and replace the MCB.
Noise Issues
SOLUTION:
A. Humping noise twice per rotation on new machine.
Solution: This noise is from the roller or running belt.
-If this is a new unit, some noise is normal as the running belt forms around the rollers.
-Check that the belt is centered and tensioned correctly.
-Remove and clean the rollers if needed.
-Replace the rollers or running belt as needed.
B. High pitched “bell-like” sound from under the motor cover.
Solution: This sound is likely a moving component.
-Remove the motor cover and check the drive belt for alignment and make sure it is not slipping or is
frayed / cut in any way. Replace the drive belt if needed.
-Make sure the optic disk on the motor is not rubbing the speed sensor.
-Turn the motor by hand to see if motor brushes or bearings are rubbing. Replace the motor if needed.
-Check the front and rear rollers, replace if needed.
C. Rubbing / grinding noise.
Solution: This sound is likely caused by the optic disk.
-Check that the optic disk is tight on the motor and not rubbing the speed sensor.
D. Banging or clunking sound/5. Slapping / thinking / squeaking sound with Each footstep.
