To access the factory settings, follow these steps:

1. Unlock the control panel by pressing the "On/Off" button for 5 seconds.

2. Press the "On/Off" button and the up arrow button simultaneously for 5 seconds to enter the menu.

3. Enter the code 1688 using the ⬆️⬇️ arrows to switch between the numbers and the clock button to move to the next digit.

4. Once all the numbers are entered, press the serrated wheel to confirm the complete code.

5. Change the parameter selection using the ⬆️⬇️ arrows.

6. Use the serrated wheel to modify the desired parameter.

7. Press the serrated wheel to confirm the modification.

8. To exit the menu, press the "On/Off" button.