If you are unable to modify the settings of your heat pump, please follow these steps:

1. On the main page, press and hold "Clock" and "-" to enter the password.

2. Press "M" to enter the first password "6," then press "M" again to enter the second password "8."

3. Press "M" to confirm.

4. Use "+" or "-" to select the parameter to adjust.

5. Press "M" to confirm.

6. Then, use "+" or "-" to change the value.

7. To exit the menu, press the "M" button.