Maintenance of datacenter fluid cooling arrangement

A maintenance system comprising a rack-mounted processing assemblies, the system comprising a processor, the system further comprising:

• a cooling unit configured to supply a cooling liquid to the rack-mounted processing assemblies and receive a heated liquid from the rack-mounted processing assemblies;
• a liquid distribution circuit configured to convey a cooling liquid from the dry cooling unit to the rack-mounted processing assemblies, the liquid distribution circuit comprising at least one heat exchanger (ALHEX) configured to cool an air flow of the rack with the cooling liquid;
• at least one fan to cool an air-flow in the rack;
• wherein, each of the rack-mounted data processing assemblies comprises:
• at least one heat-generating electronic processing element and at least one liquid cooling block arranged to be in respective thermal contact with the at least one heat-generating electronic processing element, the at least one liquid cooling block being fluidly-coupled to the liquid distribution circuit to receive the cooling liquid and circulate therethrough, and
• a smart control valve respectively arranged to be fluidly-coupled to the at least one liquid cooling block of the corresponding rack-mounted data processing assembly, the smart control valve is configured to be pressure independent and controls the flow rate of the cooling fluid of the corresponding rack-mounted data processing assembly based on detected temperatures and pressure flows, the flow rate being comprised in a range from a minimal rate when the valve is in a state called closed state to a maximal rate when the valve is in a state called fully open state;
• wherein, the processor is configured to execute a set of steps, called maintenance steps:
• open the smart control valve in the fully open state during a pre-determined time, and/or
• run said at least one fan at a maximal speed during a pre-determined time;
• wherein the processor is further configured to measure a set of at least one parameter before the maintenance steps, the measured values of the set being called initial maintenance set, and a step of measuring the set of at least one parameter after the maintenance steps, the measured values of the set being called final maintenance set.