# Starting Operation

## Switching on/off

To start the power tool, press the on/off switch (1).

GEX 12V-77: Press the locking mechanism (8) to lock the pressed on/off switch (1) in this position.

To switch off the power tool, release the on/off switch (1); or, if the switch is locked (as with GEX 12V-77), briefly press the on/off switch (1) and then release it.

## LED Displays

The following table explains the possible LED displays (4).

Colour | State | Meaning/cause | Solution
--- | --- | --- | ---
White | Continuous light (1 x to 5 x) | Speed preselection | see Setting the Speed/Permanently Setting the Speed
Green | Continuous light (2 x to 5 x) | Battery charged | see Battery charge indicator
Yellow | Continuous light (1 x) | Battery almost empty see Battery charge indicator | Replace or charge battery soon
Flashing light (5 x) | Critical temperature has been reached (motor, electronics, battery) | Run the power tool at no load and allow it to cool down
Red | Continuous light (1 x) | Battery empty see Battery charge indicator | Replace or charge battery
Flashing light (5 x) | Power tool is overheated and will switch off | Leave the power tool to cool down and switch it on again
Power tool is jammed and will switch off | Rectify the blockage and switch the power tool on again
The spindle lock is activated and the power tool will switch off | Deactivate the spindle lock and switch the power tool on again