Cooling Requirements; Troubleshooting A Pcm; Table 7-3 Minimum And Redundant Working Power Supplies Required To Power Active Boards - Sun Microsystems Enterprise 3500 System Reference Manual

TABLE 7-3
Number of Boards Minimum Number of Working PCMs
1-2
3-4
5
Failed power supplies must be replaced as soon as practical. Otherwise, the
Enterprise 3500 system will lose its redundancy and result in an outage at the next
PCM failure.
7.5.2

Cooling Requirements

Note – In the Enterprise 3500 system, all boards must be adjacent to a PCM. The
fans in the PCM cool the boards. The minimum configuration is one PCM for every
two adjacent boards.
The PCMs incorporate redundant bulk fan power so that the fans continue to
operate in a failed power supply via the redundant fan power from the peripheral
power supply.
Note – A PCM or an auxiliary fan tray must be working in PCM slot 5. The fans
cool the peripheral power supply/AC input.
7.5.3

Troubleshooting a PCM

A green LED is lit on the power supply when it is operational. When a PCM fails, a
yellow LED is lit on the PCM.
You will see a message similar to the following example on your system console
when a PCM fails:
WARNING: Core Power Supply 3 Failing
WARNING: Redundant power lost
See Chapter 10 "Flow Diagrams for Troubleshooting," for more information.
7-12 Sun Enterprise 3500 System Reference Manual • August 2001
Minimum and Redundant Working Power Supplies Required to Power
Active Boards
Enterprise 3500 System
1
2
3
Redundant Working PCMs (Hot-Pluggable)
2
3
No redundancy