Operation

Modes of Operation

The UPS has five modes of operation, indicated by the LEDs (see Figure 2-3):

•Standby Mode

—When utility is present and output is off, the Utility LED (1) flashes slowly.

—Power is not available at the UPS output.

—The UPS monitors and charges batteries, if required.

•Operate Mode

—The Utility LED (1) is solid green.

—The UPS is supplying power to the loads.

—The UPS monitors and charges batteries, if required.

•Bypass Mode

—The Utility LED (1) and Battery LED (2) are off.

—The Bypass LED (3) is solid amber, and an audible alarm is active.

—The Alarm LED (4) is solid red.

—The utility is bypassing the unit and going directly to the load.

—The UPS monitors and charges batteries, if required.

•Battery Mode

—The Battery LED (2) is solid amber.

—The Alarm LED (4) is solid red.

—Utility power is not present.

—The UPS does not charge the batteries.

—Power is available at UPS outputs.

•Redundant Mode

—The Redundant LED (5) is solid green.

—At least one electronics module of the load can be in a redundant state (two or more electronics modules working).

—All electronics modules share the load, but there is enough power to allow an electronics module to go out of service.

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HP Uninterruptible Power System R12000 XR Models User Guide