[DC3] Preventive maintenance of CRAC units, scheduled 2 months ago
We will carry out the semi-annual preventive maintenance of CRAC units according to the schedule below. 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 :
MLVBs 27/03/2020 and 30/03/2020
Operators halls : 20/03/2020
IT halls n°4 : 16 and 17/03/2020
IT halls n°3 : 18 and 19/03/2020
IT halls n°2 : 23 to 25/03/2020
IT halls n°1 : 25 and 26/03/2020
Impacts on services : Loss of cooling redundancy during the preventive maintenance operation of a CRAC unit. No impact on the cooling of facilities.
The maximum cut-off time per CRAC unit is otherwise defined at 1 hour.