Chapter 1 What’s New for FortiOS 5.2.1 : Wireless Networking : FortiAP Management : Manually Selecting AP Profiles
  
Manually Selecting AP Profiles
AP profiles are no longer assigned automatically. Instead, a default or custom profile must be chosen when the connection to the FortiAP unit is configured.
The Background Scan option has also been replaced by Spectrum Analysis (for more information, see “New Wireless Health Charts”) and either 20MHz or 40MHz must be selected for Radio 1’s channel width.
You can choose to override some options set in the profile for a particular FortiAP unit. To do this, go to WiFi Controller > Managed Access Points > Managed FortiAPs and, under Wireless Settings, select Override Settings. This allows you to change WiFi radio settings, including SSIDs, TX power, and rogue AP scanning. This can also be configured in the CLI:
Syntax
config wireless-controller wtp
edit <name>
set override-profile enable
end
end