NBN connection box - Power Supply Indicator Lights and Alarm Sounds; Alarm Sound Explanations and Causes

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The following displays are present on the front of the unit:
If the Power Supply with Battery Backup is working normally on mains power, the
SYSTEM STATUS light is green and the BATTERY POWER and REPLACE BATTERY
lights are o.
Alarm sounds
The following list describes the dierent types of audible alarm sounds
you might hear:
Power supply with Battery Backup
indicator lights and alarm sounds
Light ON Light BLINKING Light OFF
SYSTEM
STATUS
Normal System fault No mains power
and power supply
unit is o
BATTERY
POWER
Using battery
No mains power
Battery charge
low and will soon
be flat
Using mains
power or battery
is flat
REPLACE
BATTERY
Battery missing or battery has
degraded and should be replaced
Battery OK
ALARM
SILENCE
Audible alarms
silenced
Audible alarms
silenced for 24
hours
Audible alarms
enabled
Cause Alarm Sounds
Power Failure
Loss of mains power
Beeps once
Replace Battery
Battery self test fails
Beeps once every 15 minutes
Low Battery – Less than 50% remaining
Battery reserve shutdown imminent
Beeps 4 times every minute
Audible Alarm On
Alarm function is enabled
Beeps twice when enabled
Audible Alarm O
Alarm function is disabled
Beeps once when disabled