[DC3] CRAC Units proactive maintenance, scheduled 10 months ago
We will carry out the semi-annual preventive maintenance of CRAC units from September 3rd to October 4th, 2018. CRAC units will be shut down one at a time, so as not to impact the cooling of halls. Each IT zone has CRAC unit called «backup»: each CRAC unit is doubled. Each MVLB hall has a main air hanling unit (AHU).
The maintenance will be done according to the following schedule:
MLVBsand operators halls: 03 to 07/09
IT halls n°4 : 10 to 14/09
IT halls n°3 : 17 to 21/09
IT halls n°2 : 24 to 28/09
IT halls n°1: 01 to 04/10
Impacts on services : Loss of cooling redundancy during the preventive maintenance operation of aCRAC unit (max 1h). No impact on the cooling of facilities.
The maximum cut-off time per CRAC unit is otherwise defined at 1 hour