NEC A1160 manual Cooling

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Cooling

Cooling

Each cell is cooled by two fan modules. Each fan module contains two 12-volt high-performance fans that provide the airflow required to cool the cell components and processors. The fan modules are mounted in the front of the cell.

Note: The power supplies within the cell are self-cooled.

The fans have four speeds. The system automatically adjusts fan speed based on the ambient and system component temperatures or under certain failure or maintenance conditions. If a fan fails or is removed, the system switches the remaining fans in the cell to high speed. The fans return to their normal speed when the failure condition is resolved.

The cooling system is n+1 redundant; that is, it can tolerate the failure of one fan. If two fans fail, the cell powers down. If a fan module is removed, the master power control turns off power to the cell after 2 minutes. This allows time for the fan or memory to be replaced.

The fans have a green LED that is on when the fan module is functioning properly. The green LED is off on a faulty fan module or if DC power is not applied to the cell. A fan module can be replaced by a customer.

Figure 2-11 shows the location of the fan modules on the front of the cell.

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Contents EXPRESS5800/A1160 Technical Overview ƒProprietary Notice and Liability Disclaimer DecemberContents Contents Figures Page Tables ViiPage Using This Guide Who Should Use This GuidePage Safety Notices Safety NoticesPage Safety Notices for Users Outside of the U.S.A. and Canada Page Documentation Updates Scalable Symmetric Multiprocessing ServersWindows Operating Systems Operating SystemsOperating Systems Linux Operating Systems Virtual Machine MonitorsVirtual Machine Monitors Page Cell Component Express5800/A1160 CellProcessors ProcessorsProcessor Sockets Supported Processors Rules for Mixing ProcessorsMulticore Processors Extended Memory 64 Technology EM64TProcessor Voltage Regulator Modules Node ControllerMemory MemoryDimm Slot Numbering Memory BoardsDimm Capacity and Cell Memory Dimm Capacity and Cell MemoryRules for Memory Expansion Indicators on the Memory Board SubsystemDynamic Dimm Sparing Memory MirroringPCIe Card Carrier I/O Riser BoardPorts PCIe Card CarrierInbuilt RAID Controller Ports on Back of the CellPower PowerAC/DC Power Supplies Power ControlPartitions and Power Uninterruptible Power Supply UPSVolt Redundancy and AC Source Options CoolingCooling Peripherals PeripheralsBoot Options External PeripheralsSystem Clocks System ClocksExpressscope Monitor Device Names on the Expressscope Monitor LCD Fault Messages on the Expressscope Monitor LCDFault Messages on the Expressscope Monitor LCD CRU Inbuilt Virtualization Trusted Platform Module TPMInbuilt Virtualization For More InformationSystem Configuration Cell Interconnect and Multiple Cell SystemsCell Interconnect and Multiple Cell Systems System with Two CellsCell Identification System Serial NumberCell Identification Relation of Interconnect Port and Cable End to Cell IDCabinets CabinetsPartitions PartitionsClustering Redundant Configurations Redundant ConfigurationsReplaceable Components Clustering SoftwareMinimum and Maximum Configurations Express5800/A1160 Configuration SummaryExpress5800/A1160 Configuration Summary Page Server Management System ComponentsNetwork Components Windows Domain Controller Management ServerClient Workstation Console Manager Client SoftwareMain Components Management ArchitectureIntelligent Platform Management Interface Management Board Management BoardService Processor Firmware HubRemote Console Interfaces Remote Console InterfacesTrusted Platform Module TPM PortsBios Server Management SoftwareManagement Software Components Management Software ComponentsEsmpro Manager and Agent Accessing Remote Monitoring Remote MonitoringCell Components Components on the Front of a CellComponents on the Rear of a Cell LCDComponents on the Rear of a Cell AC power cord