Setting the operating time

Press keys 1 to display the operating time.

This symbol appears.

After displaying the operating time, press keys 4 and 5 simultaneously within 10 seconds.

This symbol flashes.

Set the duration using keys 1 (adjustable in 10-minute steps, maximum 30 min).

Press keys 4 and 5 simultaneously to save the operating time.

This symbol appears (steady).

The factory setting is 30 minutes.