HPE Smart Array P222 Controller precaution steps

Hello. I have HPE Smart Array P222 Controller,  in RAID 5 configuration (4x 3TB) using FreeNas, on my Hp Proliant Gen 8.
Two questions are on my mind, and concern:

- Lets say one day P222 fails and my data stays stuck on those drives. Would it be enough just to plug in new P222 and it will work? My thought was like: inserting new Controller and restore dataset saved from FreeNas. Is it so "easy" or i need to pay attention to some other things?

- What is normal temperature for P222? Server says current temp. is ~63c, should i provide it with extra cooling system or this is ok?

- Thank you.