I experienced exactly the same problem. We do a lot of changing from G7 to G8 frames... also mounting SSDs in G8 frames. And normally there is no problem if you take frames from defective original disks.
But recently someone bought a hand full of "chinese" HP disk frames and they produced the same error message. The disk will work without problem but the Smart Array controller informs you that tha LEDs won't work correctly. So I think it's an electronic communication problem between the array controller and the disk frame LED chip.
If you look closely, you can see a difference in the LED lights. The non-HP LEDs are brighter and they look more hollow when turned off. Generally those fake frames are made pretty well but it seems they didn't get the chip right...