Chapter 4: Subsystem Operation and Monitoring
Figure 4-8: PSU LED
Color
Status
Intermittent
Flashing Green
The power supply has not been turned on. The
PSU LED flashes when the subsystem is
connected to a power source but not yet turned
on.
Static Green
The PSU is operating normally
Static Amber
The PSU has failed and is unable to provide
power to the subsystem.
Table 4-7: PSU LED Definitions
4.4.7
Cooling Module LEDs
Each cooling module has two (2) LEDs located on the PSU module.
Each LED corresponds to an individual cooling fan. (See
Figure 4-9
)
Please refer to the cooling module LED definitions shown in
Table 4-
8
.
Figure 4-9: Cooling Module LEDs and Cooling Fan Locations
Color
Status
Static Amber
ON
: The cooling fan has failed.
OFF
: The cooling fan is operating normally.
Table 4-8: Cooling Module LED Definitions
The subsystem has a novel approach to stabilizing the temperature
within the chassis:
When temperature sensors detect an elevated temperature
reading or firmware acknowledges the failure of any cooling
fan/power supply, firmware will instruct the remaining cooling
Status-indicating LEDs
4-13
