Hello Roman,
Once you have copied the AP firmware image file .img up to your RFS4000 controller you can confirm the same version of AP firmware is resident on your RFS4000 controller:
Verify by:
- Via CLI access on RFS4000 key in en and press (enable prompt)
- key in show device-upgrade versions and press
The AP model and same firmware as the RFS4000 should show here:
This should allow your AP's to complete adoption and obtain configuration from the RFS4000 controller
Hope this helps