If you are unable to modify the settings in "P" (P01/P04/P05/P09/P11/P12/P13/P14/P17/P21/P25/P26/P28/ P29) of your heat pump, please follow the procedure below:

1. Press the "+" button to access the parameter verification page.

2. Use the "-" and "+" buttons to scroll through the parameter codes.

3. If you want to modify the parameter, press the "M" button to edit it.

4. Adjust the selected parameter using the "+" and "-" buttons.

5. Press the "M" button to exit the menu.