I also have the Savi Melody Pool Lights and one of the units does not operate correctly - it flashes a red light only out of sync with the other that operates normally.
I am having trouble removing the light unit. I can pull it out such that the aluminum tube is clear of the pool liner (about 6 inches) but I cannot pull it any further and am worrying that if I pull harder that I will pull the wires out of the aluminum tube. The other end is disconnected BTW.
The wiring runs through about 25' of plastic conduit so I am presuming all is OK. The lights and pool are only 3-4years old.