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NOTE: In the case of a sustained overload, the Inverter will be turned off automatically after one
minute, and will wait in the fault state for a minute. After that, it will restart again. If the overload
still persists, the Inverter will be turned off again after one minute, and will wait in fault state for one
minute and restart again. In the same way, it will try for three restarts. If the overload still persists, it
will stay in fault state permanently until the unit is restarted with push button. If the time interval
between two consecutive overloads is more than 5 mins, then the latest overload is considered as a
fresh overload and three restart cycle will begin again.
Page 11
FAULT- On Flashing Flashing Off Off Off Off Off Off Chirps every 2.5
seconds; sound is
mutable through the
front panel TEST/
MUTE push button.
The unit is in FAULT mode,
contact APC Technical
Support.
BATTERY
DISCONNECTED
On Off Flashing Off Off Off Off Off Off Chirp every 2 seconds The unit is ON-LINE mode;
battery is disconnected.
OVER TEMP ON-
BATTERY
Off Off 4 flashes
every 2
second
Off Off Off Off Off Off Continuously On The unit is in FAULT mode
due to over- temperature
condition.
OVER TEMP ON-
LINE
On Off 4 flashes
every 2
second
Off Off Off Off Off Off Off The unit is in ON-LINE mode,
but the charger is switched off
due to over- temperature.
ON LINE On Off Off On Off Off Off Off Off Off The unit is in ON-LINE, but
the inverter is disabled and
the unit will not go ON
BATTERY during a power
failure.
ON LINE SELF TEST Flashing Off Off On Off Off Off Off Off Off The unit is in ON-LINE Self-
Test mode, but the inverter is
disabled and the unit will not
go ON-BATTERY during a
power failure.
ON BATTERY SELF
TEST
Flashing On Off On On Off Off Off Off Off The unit is ON-BATTERY-
Self-Test but the inverter is
disabled and the unit will not
go ON-BATTERY during a
power failure.
ON BATTERY Low
Battery Warning
Off On Off Off On Off Off Off Off Constant Beeping,
Can be muted through
fron panel TEST/
MUTE push button.
Load is less than 25%.
ON BATTERY Low
Battery Warning
Off On Off Off On On Off Off Off Constant Beeping,
Can be muted through
front panel TEST/
MUTE push button.
Load is between 25% and
50%.
ON BATTERY Low
Battery Warning
Off On Off Off On On On Off Off Constant Beeping,
Can be muted through
front panel TEST/
MUTE push button.
Load is between 50% and
75%.
ON BATTERY Low
Battery Warning
Off On Off Off On On On On Off Constant Beeping,
Can be muted through
front panel TEST/
MUTE push button.
Load is between 75% and
Overload limit.
ON BATTERY Low
Battery Warning
Off On Off Off On On On On On Constant Beeping,
Can be muted through
front panel push
TEST/MUTE button.
Load is more than overlaod
limit.
Mode
On Mains
(green)
On Battery
(yellow)
Fault
(red)
INV
Disable
(red)
25%
(green)
50%
(green)
75%
(green)
100%
(green)
Overload
(red)
Buzzer Description