If you've paired the Gen 2 Entry Sensor (Door/Window Sensor) and want to disable the chime when a door or window is opened. please follow the directions.
Step 1: Select the sensor icon, then enter your passcode
Step 2: Select the Sensor icon
Step 3: Select the entry sensor (window or door sensor) for which you want to disable the chime when a door or window is opened.
Step 4: Select the advanced tab.
Also ensure that the Mode is set to Away/Home
Step 5: Disable the 'Entry Open Chime'.
When a door or window is opened, the alarm panel will not chime.
More information about the 'Entry even notification' option, click here for more info.