Hello Panic Mode,
Wiring has been checked as well, I've connected the EtherCAT network to a PLC instead of X44 and performed a scan topology (so from PLC> EK1100 instead of X44 > EK1100) and the EtherCAT network is functional (module powered and in RUN).
I also removed physically the EP6224 and adapted the topology and it was the EP1008 which was with the orange led... Really strange
I'll let you know if i find something else...
best regards,