Possible that your H510's Static IP'd To find out, temp install your old equipment, then try and get to the H510's from the address you remembered it being on.
I trust that you configured the r510 already through it’s web interface or iOS/Android app. Also wondering if the APs are at default IP address 192.168.0.1? Have you tried powering down the switch and power it back up so that the APs can reboot?
To do the factory hard reset at each AP, you’ll need a ladder and a strong paper clip. It is more likely you’ll have to unmount each AP to get to the reset pinhole at the rear of the r510.
Note, the r510 are locked in place. One you get up there on the ladder, at the front of the AP, there are LED status lights. You should be able to see a pin hole at the base of the front of the R510. Push In the paper clip and you should feel pressure from the spring which unlocks the latch. While doing that slide the r510 to the rear til it stops and pull down. At that point the r510 should be off the mount. You should be able to locate the reset pinhole near the Ethernet ports.
While the r510 is on, push the paper clip into the reset pinhole for 10-12 seconds. Keep the paper clip held in...for that time and then release. AP should go through the factory reset now and reboot.
At this point do the same for the other.
After it’s reset and AP mounted back on, you should be able to see two different SSIDs labels
At this point you can use a laptop or iPhone device to configure one of the APs.
Login to one of the configure-me SSIDs ...
If using a laptop, use safari or Firefox to open unleashed.ruckuswireless.com
If you choose to configure with the iPhone make sure you have downloaded the unleashed app