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Galaxy GHDX2-2430S/R-24F4D Installation and Hardware Reference Manual
System Monitoring
3-8
FLASHING indicates the batteries are being charged.
Table 3-6: BBU LED Definitions
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 backup unit) has been charged for over 12 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 twelve (12) hours and
this event is issued, you may remove and re-install the battery module. An
empty battery module may take more than 12 hours to be fully charged.
There is a timer embedded with the charger, doing so can reset the timer.
Charging will resume automatically.
3. Whenever you install/re-install a BBU, the subsystem recognizes a BBU
only after a system reset.
3.2.6 PSU Module LED
Each PSU module has one (1) LED just below the retention screw to indicate the
operational status of the PSU module. Please refer to Table 3-7 for PSU LED definitions.