since around 2 weeks, the airflow above the optical table housing has a power breakdown when one tries to switch it on.

the power breaker is in the electrical bay, on the left of the south entrance of ThomX.
the name of the power breaker switch related to the airflow is "TABLEAU ANNEAU 4".

today, with Kevin, we switched off all the airflow boxes 1 by 1 to find the defective ariflow box :
when we are face to the optical table housing panels, it is the third one from the left on the rear side.
this airflow box has been switched off (all the airflow boxes have a individual switch).
now, the airflow can be switched on again without any issue.

one needs to order 1 replacement box + some spare ones => mail to be sent to the AirC2 company.