I shipped my 2005 HONDA CR-V to Europe and in this case the battery was unplugged.When the battery was connected and the engine was started, the radio does not work, it requires a code. How and where can I find this code?

Its Code is in your car manual book. Check the car manual.May b in radio section.But that for sure it is in written in Manual Code.

If not have manual what I do

OK you haven't the code correct