Thanks everybody You are truly experts.
I added this line
$pdoConnectLink->query('SET NAMES utf8');
in the method where I create the PDO connection. Ended up like this:
$pdoConnectLink = new PDO($this->_dbstring, $this->_username, $this->_password);
$pdoConnectLink->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$pdoConnectLink->query('SET NAMES utf8');
return $pdoConnectLink;
:):)
Your sincerely Magnus