5D3 restarts every few minutes

So here is my case. I’m sorry to bother you but the support doesn’t seem to be interested in answering my request (maybe because of there is just one month warranty left?)

Since months my drobo 5D3 is starting normally, working properly and then reboots after a few minutes again and again until it stays in a circle of reboots every few seconds.

Every day it is the same, this problem repeats also in RO Mode. It’s not about the cable (doesn’t matter which port or if it’s thunderbolt 3 / USB C).

Because of the time and type of restarts i would think about something heat related but i’m open to any suggestion.

Any idea what to do?