Delta 1KVA User Manual page 19

BATTERY LOW: This function is to inform user the remaining power capacity
of the batteries. When batteries reach a low level condition, the UPS alarm
will beep half second every 1.5 seconds until running out of battery capacity.
Shown as fig 4-7.
Fig 4-7 Battery Low
SHORT CIRCUIT: When the output of the UPS shorts in【ON-LINE mode】or
【ON-BATTERY mode】, the UPS will shut down (without output voltage). As
soon as the short circuit is happened, the fault LED will light on and the UPS
alarm will sound continuously. When remove short circuit, the UPS output will
recover. If short circuit is happened in "BYPASS mode", the UPS will protect
itself by tripping the input breaker and shut down. Shown as fig 4-8.
Fig 4-8 Short Circuit
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SHEET 19 TO 20