Setting a password on your CCU is a way to block out people in your building from touching or adjusting the temp controls or schedules of your building/zones. In order to do this you'll want to follow these quick steps:
1: Select the gear icon in the top right of the CCU home screen.
2: Select "Settings" in the top middle of the screen in-between "Floor Layout" and "Tuners".
3: Select the icon that looks like a lock this will bring you to the locks screen where you can select too set a password to block out certain functions.