Delta 3KVA User Manual page 21

BATTERY REPLACE: This LED function is to alert user that the batteries should
be replaced. When the microprocessor in the UPS detects a battery fault, the UPS
alarm will give out three beeps. Each beep lasts for 0.5 seconds and interrupted by an
interval of 0.5 seconds. After the initial 3 beeps, the alarm will continue to sound
every one hour. Shown as fig 4-7.
Fig 4-7 Battery Replace
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 4-8.
Fig 4-8 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 4-9.
Fig 4-9 Short Circuit
20
SHEET 21 TO 22