Hi Kewal,
Yes, RMA is still possible for ZD1100 but mode of RMA will be RTF (return to factory) even when you don't have support contract purchased. I hope device was purchased from a authorized Ruckus reseller/partner.
I am not sure about ZD1000 but will check internally and will get back to you.
Regards,
Syamantak Omer
Syamantak Omer | Community moderator | Staff TSE | CWNA | CCNA | RASZA | RICXI | Follow me at https://linkedin.com/in/syamantak-omer-5949b6124