American Power Conversion 400 user manual Operation

5.0Operation

5.1Front-panel indicators

Replace Battery	Low Battery	Overload	On Battery	On Line
indicator	indicator	indicator	indicator	indicator
see Sec. 5.1.1	see Sec. 5.1.2	see Sec. 5.1.3	see Sec. 5.1.4	see Sec. 5.1.5

5.1.1 Replace Battery indicator

The Replace Battery indicator lights when the UPS’s battery fails the self-test. The indicator turns off after a successful self-test.

5.1.2 Low Battery indicator

The Low Battery indicator lights when less than 2 minutes of backup power are available from the battery.

5.1.3 Overload indicator

The Overload indicator lights when the load exceeds the UPS’s rating of 400 VA (250 W).

5.1.4 On Battery indicator

The On Battery indicator lights when the load has been transferred to UPS battery power, and the utility voltage is not within speci- fied limits.

5.1.5 On Line indicator

The On Line indicator lights when the load is being supplied conditioned power from the utility service. This indicator blinks during the self-test.

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