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Chapter 3: Monitoring
3.2.6 BBU Module LED
The BBU module has an LED on its faceplate. (See Figure 3-5) The function is the
same as the fifth LED on the controller module. The LED is off when the BBU is
functioning normally and is able to sustain the cache memory. The LED flashes to
indicate the BBU is currently charging its battery cells. If the LED is illuminating
amber, the unit may have failed. Please contact your system vendor to verify the
problem.
Figure 3-5: BBU Module LED
3.2.7 PSU LED
Figure 3- 6: PSU LED
Each PSU comes with a single LED located just above the power switch and just
below the retention screw (see Figure 3- 6). The LED is used to indicate the
operational status of the PSU module. Please refer to the PSU LED definitions shown
in Table 3- 6.
Color Status
Flashing
Green
The power supply has not been turned on. The PSU module LED
will blink when the subsystem is connected to a power source but
has not been turned on.
Static Green
The PSU is operating normally and experiencing no problems
Static Red
The PSU has failed and is unable to continue providing power to
the subsystem.
OFF
The power cord is unplugged or the power cord is plugged but no
power is being supplied from the power source.
Table 3- 6: PSU Module LED Definitions
3.2.8 Cooling Fan Module LED
The cooling fan module comes with a single status-indicating red LED shown in
Figure 3-7. LED definitions are given in Table 3-7.
3-7
Status-indicating LEDs