IBM System Storage EXP2512 Express Storage Enclosure, Installation, User'S, And Maintenance Manual

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Overtemperature LED (amber)
When this amber LED is lit, it indicates that the EXP2500 is in an
overtemperature condition.
System error LED (amber)
When this amber LED is lit, it indicates that the unit has a fault, such as in
a power supply, ESM, or hard disk drive.
Hard disk drive activity LED (green)
Each hard disk drive has an activity LED. When this green LED is flashing,
it indicates drive activity.
Hard disk drive status LED (amber)
Each hard disk drive has a status LED. When this amber LED is lit
continuously, it indicates a drive failure. When it is flashing, it indicates that
a drive Identify or Rebuild is in progress.
Rear view: power supply
The two hot-swap power supplies are on the rear of the EXP2500.
Attention: The EXP2500 comes with two installed power supplies. When one
power supply fails, the power-supply unit must be replaced to reestablish
redundancy. When you replace a failed unit with a new power supply, make sure
that you perform this operation in less than 10 minutes to prevent overheating.
The power-supply controls and connectors are shown in the following illustration.
OK
IN
AC power
connector
Release
tab
Handle
Release tab
Press the release tab to the right and rotate the handle downward to
remove the power supply.
Handle
Use the handle to install or remove the power supply.
AC power connector
Connect the power cord for the power supply to this connector.
Note: There is no power switch on the power supply. A power supply is active
when a power cord is connected to it and to a power source.
Chapter 3. EXP2500 controls, LEDs, and power
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