Issue adding Fibaro RGBW Controller

I have a couple of these and have added them with no issues. Just tried adding a new one today and cannot get it to respond. I am using Homeseer 3 with a Z-Net.  I put the Z-Net in add mode and then apply power to the Fibaro but nothing shows up. I have tried moving closer to the Z-Net, including basically on top of it, so I am pretty sure the Fibaro is not going into add mode.
 
A couple of questions:

1, How do I know if the unit is working - is there anyway to confirm that the unit is working?
2, Assuming it is working, the instructions say that you can put the unit in a mode where it doesn't go into auto-add mode with power applied.  In order to get it in or out of this mode and to add it to a Z-wave network when in this mode you have to "quickly press the B button or switch connected to one of the inputs.  I am not sure what this means or how I would go about doing this.  Any help here would be appreciated.
 
Manual:
https://manuals.fibaro.com/rgbw/

Thanks.
 
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