Bought house from previous owner with two 510's Primary has solid red light and unable to setup
Was it set up already, or did he reset it before leaving?
https://support.essensys.tech/en/articles/1596384-wifi-wireless-access-point-what-do-the-lights-indicate
The solid RED LED means that unit is in bootup process.
Could you try to factory default the unit and then try the setup?Do you get any error during the setup?
A solid red power LED indicates the hardware problem.
I suggest you to try factory reset and see if you can gain access to the AP in default mode, if you cannot, you have to replace the APs.
Refer below self-help post explaining how to rest different AP models.
https://community.ruckuswireless.com/t5/RUCKUS-Self-Help/How-to-factory-reset-or-factory-default-different-type-of-Ruckus/m-p/46029#M43