What can i do to find details that have not been left, I have No IP's of the units, no login details . i know there are about 10 wifi units around the site. is there an easy way i can retake control of this and audit what is on site
Unfortunately without the login credentials you're limited as to what can be done. Even going via the console will be limited. Given there are only 10 units you may be able to just factory reset the device and start from scratch, which although a great initial hassle, will help get everything sorted in the long run. If that isn't an option though, you may be able to find some luck with this article: https://support.ruckuswireless.com/answers/000002004 (note that you're not guaranteed a positive result).
Depending on the config, if you reset the ZoneDirector you may also have to reset the APs.
My name is Roberto Flores and I work for Ruckus support. There is a way to get the IP address of the ZD. The ZD by default has UPNP enabled. This means that if you connect a laptop to one of the ports of the ZD, the laptop will get an IP address from the same network that the ZD may reside on. Then you can open a Windows folder (using a Windows machine) and click on the Network option (Id don't know the Apple option of discovery and thus referencing a Windows client). It will discover the ZD IP address.
Now, once you have the ZD IP address, you would have to login. You would need the username and password. If you don't user/password then if the previous folks left you a debug info file or a backup file of the controller, Ruckus support can extract the password from decrypting the file. You can provide us with the file via a new post.
The last option is to factory default the ZD for which the IP address would be 192.168.0.1 with user/password = super/sp-admin (respectively). You can get the manual and quick startup guide for the Zone Director controller from your Ruckus support portal (https://support.ruckuswireless.com).