AR3016 Installation and Hardware Reference Manual
3-8
Status-indicating LEDs
IMPORTANT!
In addition to BBU failure itself and the charger failure, the
subsystem may also light the BBU fault LED when the following
occur:
1.
The temperature sensor embedded with the charger circuit
reports a temperature reading exceeding 45 degree Celsius.
2.
The BBU (battery cell pack) has been charged for over 7 hours.
The BBU charger will enter a timer fault state.
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.
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 is improved, charging will resume
automatically.
2.
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.
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
.
Figure 3-6: PSU LED Location
