User`s guide
Table Of Contents
- NovaScale 4020 User's Guide
- Preface
- Contents
- 1 System Description
- 2 Board Set Description
- 3 Configuration Software and Utilities
- Utilities / Drivers on Resource CD
- Power-on Sequence and Power-on Self-Test (POST)
- Extensible Firmware Interface Boot Manager
- The Extensible Firmware Interface (EFI) Shell
- BIOS Setup
- LSI Logic* SCSI Utility
- System Maintenance Utility
- EFI Platform Diagnostic Tests
- EFI Service Partition
- Console Redirection
- Terminal Mode
- Shutting Down the Server
- Servicing the System (basic knowledge)
- A Warning and Cautions
- B Working Inside the System
- C Hot-swapping System Components
- D Servicing the Electronics Bay
- Safety Warnings
System Description 9
The AC power status LEDs in the power supply module provide information on the status of the
power sources. The LEDs are shown below, indicated by the letter “A” in the diagram. The
possible LED states are described below the diagram.
TP00304
A
LED Description
AC1 (green) On - AC input #1 available.
Off - AC input #1 unavailable or below voltage threshold to power up the system.
AC2 (green) On - AC input #2 available.
Off - AC input #2 unavailable or below voltage threshold to power up the system.
ACR (green) On - redundant feature is available.
Off - redundant feature is not available
Figure 9. AC Power Status LEDs
The power redundancy feature requires each of the following conditions be present.
• AC input #1 available
• AC input #2 available
• Power good signals asserted from all three power supply modules
• TS-OK signal is asserted