10. Trouble Shooting Brush Motor
Controller (Sport Models only)
1. The I-drive brush motor controller works similar to the traction drive I-Drive controllers, except for
is rated for 180 amps.
2. The sport key switch changes the speed of the brush motor speed from 200 rpms to 400 rpms.
3. The potentiometer for the brush controller is mounted inside the electrical box and is always set to
the full clockwise position. Turning it counter clockwise will slow both speeds of the brush motor.
Turning it full counter clockwise will shut the brush motor off.
4. When brush motor current reaches 50 to 52 amps, the motor will be throttled back to 35 amps to
prevent from over heating over loading. Try dispensing more water and reduce pad pressure by
removing the weighted plate, if needed to prevent controller from over heating and shutting down.
(circuit breaker has not tripped)
5. The brush controller has a thermo shut off built in it, and it will shut down the brush motor when
the controller overheats. It will rest automatically.
6. The brush motor can be activated in both the unload and scrubbing modes.
7. When using the unload feature the key switch must be held in the counter-clockwise position for at
lease 5 seconds so that the controller has time to boot up.
8. Testing Potentiometer - See page 59.
9. If the unload feature works, but the brush motor will not run in the scrubbing mode. Check the
brush switch in the handle and the switch in the front of the machine. See below
Page 38
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