Owner's Manual
Table Of Contents
- Dell PowerEdge R920 System Owner's Manual
- About Your System
- Using The System Setup and Boot Manager
- Installing System Components
- Recommended Tools
- Front Bezel (Optional)
- Opening And Closing The System
- 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 Board
- System Board
- Troubleshooting Your System
- Safety First—For You And Your System
- 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 Supplies
- 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

Error Code Message Information
PSU0034
Message An under voltage fault detected on power supply <
number
>.
LCD Message An under voltage fault detected on PSU <
number
>. Check power
source.
Details This failure may be the result of an electrical issue with cables or
subsystem components in the system.
Action
1. Remove and reinstall the power supply.
2. Check cables and subsystem components in the system for
damage.
3. If the issue persists, see Getting Help.
PSU0035
Message An over voltage fault detected on power supply <
number
>.
LCD Message Over voltage fault on PSU <
number
>. Check PSU.
Action Check input power or reinstall the power supply. If the issue persists,
see Getting Help.
PSU0036
Message An over current fault detected on power supply <
number
>.
LCD Message An over current fault detected on PSU <
number
>. Check PSU.
Details This failure may be the result of an electrical issue with cables or
subsystem components in the system.
Action
1. Remove and reinstall the power supply.
2. Check cables and subsystem components in the system for
damage.
3. If the issue persists, see Getting Help.
PSU0037
Message Fan failure detected on power supply <
number
>.
LCD Message Fan failure detected on PSU <
number
>. Check PSU.
Action Check for fan blockage. If the problem persists, see Getting Help.
PSU0076
Message A power supply wattage mismatch is detected; power supply
<
number
> is rated for <
value
> watts.
LCD Message PSU wattage mismatch; PSU <
number
> = <
value
>watts
Details Power supplies should be of the same input type and power rating.
Action Install matched power supplies and review this manual for proper
configuration.
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