Can you try doing the below steps:
1. Press and hold the reset button for 10-12 seconds.
2. Now check for "Configure.me" SSID the format will be "Configure.me.x.x.x.x where the x.x.x.x is the AP MAC address.
3. Connect to the Configure.me for further setup.
If you do not see the "Configure.me" SSID, then try the below steps:
If the AP is powered by the power injector:
1. Connect the laptop to the Ethernet port.
2. Make sure the Laptop is configured with the IP 192.168.0.10 255.255.255.0
3. Keep the continuous ping to the AP default IP 192.168.0.1
4. Press and hold the reset button for 10-12 seconds.
5. See the ping response, once you get it, access the IP 192.168.0.1 or https://unleashed.ruckuswireless.com
6. Follow the steps for further settings.
Let us know if you face any issues?