Chapter 4: Subsystem Operation and Monitoring
Color
Status
Intermittent
Flashing Green
The power supply has not been turned on. The PSU
LED flashes slowly when the subsystem is
connected to a power source but not yet turned on.
Static Green
The PSU is operating normally
Static Red
The PSU has failed and is unable to provide power
to the subsystem.
Table 4-8: PSU LED Definitions
4.2.7 Cooling Module LEDs
Each cooling module has two (2) red LEDs located on the PSU module.
Each LED corresponds to an individual cooling fan. (See
Figure 4-7
) Please
refer to the cooling module LED definitions shown in
Table 4-9
.
Figure 4-7: Cooling Module LEDs and Cooling Fan Locations
Color
Status
Static Green
The cooling fan is operating normally.
Static Red
The cooling fan has failed.
Table 4-9: Cooling Module LED Definitions
The subsystem has a novel approach to stabilizing the temperature within
the chassis:
1. When temperature sensors detect an elevated temperature
reading or the failure of any cooling fan/power supply,
firmware will instruct the remaining cooling fans to operate at
a high speed.
Status-indicating LEDs
4-9
