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AR3016 Installation and Hardware Reference Manual
In addition to BBU failure itself and the charger failure, the
subsystem may also light the BBU fault LED when the following
occur:
1.
2. The BBU (battery cell pack) has been charged for over 7 hours.
When the above conditions occur, the charger circuit will enter a low-
power and self-protection state.
You may correct the faults when receiving a "BBU Thermal
Shutdown/Enter Sleep-Mode!" event message:
1.
2.
3.2.7 PSU LEDs
Each PSU comes with a single LED at the back (see Figure 3-6), located
just above the power switch that turns on the subsystem. This LED indicates
the operational status of the PSU module. Please refer to the PSU LED
definitions shown in Table 3-8.
3-8
IMPORTANT!
The temperature sensor embedded with the charger circuit
reports a temperature reading exceeding 45 degree Celsius.
The BBU charger will enter a timer fault state.
Check proper ventilation within the subsystem. You may also
check the readings from other sensors within the enclosure.
Airflow might have been disrupted by the absence of one or
several major modules or the failure of a cooling fan. Once the
thermal
condition
automatically.
If a new battery module has been charged for over seven (7)
hours and this event is issued, you may remove and re-install the
battery module. An empty battery module may take more than 7
hours to be fully charge. There is a timer embedded with the
charger, doing so can reset the timer. Charging will resume
automatically.
Figure 3-6: PSU LED Location
is
improved,
charging
Status-indicating LEDs
will
resume
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