Shortly checked out forum and didn't find out any similar problem 1. Old system, worked for 5-6 years. Quite large. 2. 4x5512RVFP units were providing power to the C-BUS along with one separate din-rail Clipsal power source 3. Client reported about strange behaviour of the system - loads not turning on/off after key pressed, LEDs on key blinking blue/orange after pressing, etc. 4. Scan from setup software didn't show any units in network 5. I was able to fing out that removing of one 5512RVFP from network solves the problem - so looks like power source in this unit and/or it's C-Bus part is responsible for this problem Questions: 1. Any chances to revive the 5512RVFP? 2. Will disabling powersource in this unit help and is it possible to disable the power source as network burden or clock? 3. Is it worth to do so or just buy a new one and forget about it?