ALFRA ROTABEST RB 35 SP Manuel D'utilisation page 18

The motor emergency stop function is also deactivated.
Risk of injury.
The user bears sole responsibility for the proper, safe handling of the core drilling machine.
Motor LED on the operating panel
The LEDs on the operating panel signal the state of the motor and the carbon brushes.
LED off
LED green
LED green
LED green
Carbon brush wear control
The core drilling machine has an integrated carbon brush wear control feature, so that the motor LED flashes red
as soon as the carbon brushes have been worn down to a certain level by mechanical abrasion. Replace the
carbon brushes as soon as possible and always both at the same time.
In order to replace the carbon brushes, remove the black plastic cap on the top of the motor and insert the two new
brushes, clamp in the groove with the spring and connect the supply cables.
Always replace both carbon brushes.
Poor maintenance leads to a defective motor.
Motor off
Motor on
Motor overheated due to excess load. The motor can be activated again
after it has cooled off.
Carbon brushes are worn and must be replaced
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