I recently added an LED strip (an Ikea Ledberg) to a niche in my hallway. It's powered by an ordinary outlet with an Icon 2856 v4.1 adapter and then the transormer/psu.
Turn it on and it goes off. And frequently back on. And off again and so on for varying lengths of sequence. It even seems to do it when I use the set button to manually turn it on.
With no psu plugged in it behaves as normal. With several other varieties of psu (laptop etc) it misbehaves. With one specific (but unfortunately not really usable) led psu it seems fine. The behaviour is not correlated to any particular outlet, nor even to just one icon adapter - I have several of each to test with.
The error reported is
Error "Entry niche light" on; send failed (no acknowledgment)
It never seems to fail when told to turn off, which I guess is a good thing.
Thoughts on usable commands, preferences, possible tweaks to the psu, whatever, all welcomed. My best WAG for now is some issue to do with the magic smoke in the psu circuitry being of the wrong flavour. Help me Obi-Wan Domoto! You're my only hope!