- Notes, cautions, and warnings
- About your system
- Using the system setup and boot manager
- Installing and removing system components
- Recommended Tools
- Front bezel (optional)
- System cover
- Inside The System
- Cable Management Tray
- System Memory
- General Memory Module Installation Guidelines
- Mode-Specific Guidelines
- Advanced ECC (Lockstep)
- Memory optimized independent channel mode
- Memory sparing
- Memory mirroring
- Fault Resilient Memory
- Sample Memory Configurations
- Removing A Memory-Riser Blank
- Installing A Memory-Riser Blank
- Removing A Memory Riser
- Installing A Memory Riser
- Removing Memory Modules From The Memory Riser
- Installing Memory Modules
- Memory Riser And Fan Cage
- Hard drives
- Optical Drive (Optional)
- Cooling Fans
- Internal USB Memory Key (Optional)
- Expansion Cards And Expansion-Card Risers
- Expansion Card Installation Guidelines
- Removing The Left Expansion Card Riser Blank
- Installing The Left Expansion Card Riser Blank
- Removing The Right Expansion Card Riser Blank
- Removing An Expansion Card From Expansion-Card Risers 2 and 3
- Installing An Expansion Card Into The Expansion-Card Riser 2 and 3
- NDC Riser (I/O Riser 1)
- Network Daughter Card
- SD vFlash card
- Internal Dual SD Module
- Internal SD card
- Integrated Storage Controller Card
- RAID Battery
- Processors
- Power Supplies
- Hot Spare Feature
- Removing an AC power supply
- Installing an AC power supply
- Wiring instructions for a DC power supply
- Assembling And Connecting The Safety Ground Wire
- Assembling The DC Input Power Wires
- Removing A DC Power Supply
- Installing A DC Power Supply
- Removing The Power Supply Blank
- Installing The Power Supply Blank
- Power Distribution Board
- System battery
- Hard-Drive Backplane
- SAS Expander Daughter Card
- Control panel assembly
- System board
- Troubleshooting your system
- Minimum configuration to POST
- Troubleshooting system startup failure
- Troubleshooting external connections
- Troubleshooting the video subsystem
- Troubleshooting a USB device
- Troubleshooting a serial I/O device
- Troubleshooting a wet system
- Troubleshooting a damaged system
- Troubleshooting the system battery
- Troubleshooting power supply units
- Troubleshooting Cooling Problems
- Troubleshooting cooling fans
- Troubleshooting system memory
- Troubleshooting an internal USB key
- Troubleshooting an SD card
- Troubleshooting an optical drive
- Troubleshooting A Hard Drive
- Troubleshooting a storage controller
- Troubleshooting expansion cards
- Troubleshooting Processors
- Using system diagnostics
- Jumpers and connectors
- Technical Specifications
- System messages
- Getting help
Dell PowerEdge R920 System Owner's Manual
Cooling Fans
Your system
supports six hot-swappable cooling fans that are mounted in a memory
riser and fan cage. These fans provide cooling for the processors,
expansion cards, and memory modules. Individual fans are connected
to the fan tray located below the fan cage. The fan tray is connected
through a single 12x2 connector to the system board.
NOTE:In the event of a failure,
excessive temperature, or a problem with a particular fan, the fan
number is referenced by the ESM, allowing you to easily identify and
replace the particular fan by noting the fan numbers on the cooling
fan assembly.
NOTE: Do not place any physical obstructions in the front
or rear of the chassis. This may cause a decrease in airflow, resulting
in an over-heating condition.
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