this. if unsure, go to the menu and bind something to your home key, see what it says on screen and use that in console. it should end up being kp_home though.
Make sure your keyboard doesn't have any special locks on it, like most keyboards have Scroll Lock, Num Lock and Caps Lock, but some keyboards have others such as Function Lock.
Last time I checked QL didn't support the binding of scancodes (besides /bind 0x00, which basically catches every unknown key (like my headset volume controls for example)). It's been a while tho.