I'm Jean Louis From Machines Tools Services in France
You have Chance! I can help you for this.
Your problem cam from the RF01, or 701 PCB, of your MRS Unit, There is a static (same as SSR) Relay around an Hybride circuit on this PCB, This relay have an red LED No? and it is not Light No? This Static relay is probably broken and the Ready signal to power on the servo is not comming! Then alarme 55....!
I repaired many cards like this one.
Let me know where are you? Witch country? May be I can repaired it for you!
In first try to change this Bladdy relay! Then may be ok? Take care to the Board to the Static Current from your body! Every things can Explode at Power On !!!