American Power Conversion 400 Audible alarms, On-battery alarm, Low battery, Replace battery

5.0 Operation

5.3 Audible alarms

The UPS features an audible alarm that beeps to indicate certain conditions (see Secs. 5.3.1–5.3.4). Operation of the audible alarm is configurable using UPS monitoring software (see Sec. 5.5.4).

5.3.1 On-battery alarm

The UPS emits four short beeps every 30 seconds when the UPS is operat- ing on battery power.

5.3.2 Low battery

The UPS beeps steadily to indicate that less than 2 minutes of power remains before shutdown from battery exhaustion. The low-battery warn- ing interval is configurable (see Sec. 5.5.4).

5.3.3 Replace battery

The UPS emits short beeps for 1 minute if the UPS’s batteries fail the self- test. If the UPS is left operating in this condition, the UPS emits short beeps once every 5 hours until a successful battery test is completed.

5.3.4 Overload

The UPS emits a loud, sustained tone when overloaded. When the load exceeds the UPS’s rating during on-line operation, the alarm sounds until the overload is removed. If the overload occurs during on-battery opera- tion, the alarm sounds until the UPS Enable switch on the rear panel is turned off.

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