[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:
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.