If you are unable to modify the heat pump settings, please follow the procedure below:

- On the main screen, press and hold "Clock" and "-" to access the password input screen.
- Press "M" to enter the first password, "6", then press "M" again to enter the second password, "8".
- Confirm by pressing "M".
- Then, use the "+" or "-" buttons to select the parameter you want to adjust.
- Confirm by pressing "M".
- Then, using the "+" or "-" buttons, adjust the value.
- To exit the menu, press the "M" button.