Monday 18th May 2020

[DC3] Preventive maintenance of CRAC units, scheduled 2 months ago

[DC3] Preventive maintenance of CRAC units

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:

  • ML[removed] 08/07/2020 and 09/07/2020
  • Operators halls : 07/07/2020
  • IT hallsn°4 : 04 and 05/06/2020
  • IT halls n°3 : 02 and 03/06/2020
  • IT halls n°2 : 02 to 06/07/2020
  • IT halls n°1 : 30/06 and 01/07/2020

The maximum cut-off time per CRAC unit is otherwise defined at 1 hour

Impact : Loss of cooling redundancy during the preventive maintenance operation of a CRAC unit (max 1h). No impact on the cooling of facilities.

Start : 02-Jun-2020 0630Z (0830LT)
End : 09-Jul-2020 1530Z (1730LT)