How do I change the date and time on my Daikin Altherma unit?

For 3^rd generation Daikin Altherma units (MMI - built-in user interface)

1. Use the left wheel to navigate to “User settings”
2. Click the left wheel to enter the menu
3. Navigate to “Time/date”
4. Click the left wheel to enter the menu
5. Use the right wheel to adjust the fields

For 1^st and 2^nd generation Daikin Altherma units (room thermostat - external user interface)

1. Use the thermostat
2. Click on the options button (down-right)
3. Navigate to “Set time/date”
4. Click “OK”
5. Set the current date and time