26Table 4-3 BuzzerPriority UPS condition Buzzer1 UPS fault and failure Continuous2 Normal mode No beep3 Battery/battery test mode One beep per 4 sec(One beep per 1s when battery low)4 Bypass mode One beep per 2 minutes5 Overload One beep per 500ms6 Other alarm One beep per 1s7 Manual bypass One beep per 1sNote: buzzer alarm can be enable/disable by function button, if buzzeralarm is disabled, all present alarm is muted except that the button pressstill has a tick beep. Buzzer alarm will be enabled automatically once newalarm arises.InterfaceIn order to make sure all segments are OK, LCD begins to do self-test afterpower on. During self-test, all the segments will be lighted for 2 seconds,then the LCD will turn to normal display status.Fig. 4-2 The default LCD display