Moto g 2nd gen, lollipop bootloader unlock issue

I have just bought Moto G 2nd generation smart phone with 16 gb internal memory. To root device, I tried to unlock bootloader. But it didn't go smooth. When I hit command `fastboot oem unlock , I got success message with status Device unlocked. Status 3`. But what the heck this `status 3`?. I am not getting any info about this. Google search is showing that, at time of unlocking bootloader, few messages are shown like `unlocked then restarted and device restarts. But this didn't happen with me. So I manually restarted my device for custom recovery. And flashed rom using TWRP2.7.1.1-titan-motog-2014. This command also showed me success message. Before this I copied UPDATE-SuperSU-v2.02.zip` in device. But after restarting and hitting recovery, device is not showing any thing and just black screen and then turning off. Apart from this device is working fine, with normal boot. P.S. `RootChecker is showing that Root access is not properly installed on this device`. So what is the way out to root the device again properly? Thanks in advance.