I have a (partially) rooted Samsung Note 2. I can't access the SuperSU app.
Whenever I try to open it, I get the error No Su binary installed and it doesn't install it.
I used Root Checker App too and it says the phone is not rooted completely.
Couple of things you can do here try to uninstall all the applications that are related to super user. first install" System app remover and uninstall the applications restart your phone and install root checker-supersu. Ping me in if you find any more issues.