IBM Partner Pavilion DS4100 manual Levers, Power LED, AC power switches

to “Turning off the storage server” on page 67 and follow the procedure described there before replacing the power supply on a DS4100 single-controller storage server.

Each power supply CRU has a built-in sensor that detects the following conditions:

vOver-voltage

vOver-current

vOverheated power supply

If any of these conditions occurs, one or both power supplies will shut down. All power remains off until you cycle the power switches (turn the power switches off, wait at least 30 seconds, then turn the power switches on). For more information, see “Restoring power after an unexpected shutdown” on page 68 and “Restoring power after an over-temperature shutdown” on page 69.

The power supplies are customer replaceable units (CRUs) and do not require preventive maintenance.

vAlways keep the power supplies in their proper places to maintain proper controller-unit cooling.

vUse only the supported power supplies for your specific storage server.

The power-supply controls on the rear of the storage server are shown in Figure 66.

Lever		Hot-swap power
	Power LED	supplies	Lever Power LED

AC power
connector	Fault LED		Fault LED
Strain-
	AC power	AC power	AC power
relief clamp
	switch	connector	Strain- switch
			relief clamp

Figure 66. Power supply controls

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Levers

Use these locking handles to remove or install a power supply.

Power LED

These green LEDs light when the storage server is turned on and receiving ac power.

Fault LEDs

These amber LEDs light if a power supply failure occurs or if the power supply is turned off.

AC power switches

Use these switches to turn the power supplies on and off. You must turn on both switches to take advantage of the redundant power supplies.

90IBM TotalStorage DS4100 Storage Server: Installation, User’s, and Maintenance Guide