Hi
probably we have here a misunderstanding. The country code is from scratch changed on the following command:
# config wireless-controller setting # set country CH # end
This can be done by 5.0, 5.2.x and/or 5.4 but on 5.0 you HAVE TO DELETED first all WTP Profiles. If you do not so you can not change the country code under 5.0. On 5.2/5.4 you can do it on the fly but the channels within ALL wtp profiles will be resetted! From this point of view you have under 5.2/5.4 to check the channels. If you do so at all please do not mix up the country information on the FAP itself which means. If you set on the FGT wireless controller set country CH you will recognize on the FAP interface Europe etc. This means if you buy a FAP from Forti you can by US versions, Europe versions etc. If you buy in switzerland a Europe version and you use this FAP in US you wil have a probem from technical wireless law point of view and yes the only solutions is to exchange this FAP.
hope this helps
have fun
Andrea