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Symbols, LEDs and Audible Alarms
The front panel indicators (LEDs) and an audible beep indicate the unit status. The unit beeps
whenever the unit is on battery power or an alarm exists. See Figure 1 for information about the
LEDs and Table 1 for information about alarm displays.
(C)
(D)
(E)
(F)
Constant: Operating on
AC line.
An Alarm condition exists when LED (C) is blinking or when
an audible beep is sounding.
AC Line Operation:
% of rated load.
C, D, E, F = 75 –
100%
D, E, F = 50 – 75%
E, F = 25 – 50%
F = 0 – 25%
Battery Operation:
% of battery capacity.
C, D, E, F = 75 –
100%
C, D, E = 50 – 75%
C, D = 25 – 50%
C = 0 – 25%; F
begins blinking with
less than two minutes
of runtime remaining.
Blinking: Operating in
Bypass.
Figure 1: Front Panel LEDs
The alarm display in the left column of Table 1 shows several things: it shows the number of
beeps per time period (for example, 3 beeps every 5 seconds), or a constant beep or no beeps,
and the LED configuration. LEDs are shown as being off (no shading), on (shaded), or blink-
ing (radiating lines).
Constant: Operating on batteries (inverter).
