The safety lock has been activated. The  symbol lights up in the display.
Press the Settings sensor.
All available symbols are shown in the display. The  symbol flashes.
Press the OK sensor to confirm your choice.
The most recently selected setting flashes and the  symbol lights up in the display.
Press the  or  sensors to activate or deactivate the lock.
Deactivate the lock as follows:
- 0: the lock is deactivated. 
- 1: the lock function is activated. 
Press the OK sensor to confirm your choice.
Press the Settings sensor to exit Settings mode.
The  symbol will appear in the display when the lock is activated.
