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Table 51. Interconnect-battery unit LEDs (continued)
Legend
LED
Color
Normal Status
Problem Status/Procedure
4
Locate/
Identify
White LED
Note:
This
LED is
shown as
blue (and
displayed in
a different
order) when
the DS5100
and DS5300
bezel is
installed.
See “Front
bezel LEDs”
on page
144.
Off
On = storage subsystem locate
5
Service
Action
Allowed
Blue LED
Off
On = Safe to remove
See “Replacing the
interconnect-battery unit” on page
187.
6
Battery
Needs
Attention
Amber LED
Off
On = Battery failed
See “Replacing a backup battery
pack” on page 191.
The Power, Overall Configuration Needs Attention, and Locate LEDs are general
indicators for the entire storage subsystem (or configuration, in the case of the
Overall Configuration Needs Attention), not specifically for the interconnect-battery
unit. The Overall Configuration Needs Attention LED turns on if a fault condition is
detected in any component in the storage subsystem configuration, including all
attached storage expansion enclosures. The Power, Overall Configuration Needs
Attention, and Locate LEDs shine through the front bezel.
Attention:
If the Overall Configuration Needs Attention LED lights, refer to the DS
Storage Manager client software to determine the problem with the storage
subsystem. Also, inspect the Needs Attention LEDs on the other components in the
storage subsystem to help isolate the fault to a specific component.
Recovering from an overheated power supply and fan unit
The storage subsystem has two power supply and fan units. Each power supply
and fan unit contains a power supply, a cooling fan, a battery charger, and a built-in
temperature sensor designed to prevent the power supplies from overheating.
Under normal operating conditions, with an ambient air temperature range of 10° C
to 35° C (50° F to 95° F), the cooling fans maintain a proper operating temperature
inside the storage subsystem.
Several factors can cause the power supplies to overheat. These factors include the
following:
v
Unusually high room temperature
v
Fan failure
v
Defective circuitry in the power supply
156
IBM System Storage DS5100 and DS5300 Storage Subsystem: Installation, User’s, and Maintenance Guide