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ENGLISH
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Please fill out the warranty registration card and return it to your local Best Power office. If
you are in the U.S.A. or Canada and you would like to activate the Warranty for Transient
Voltage Surge Suppression, please return the registration card within 10 days of installation.
Symbols, LEDs and Audible Beeps
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 is present. See Table 1 for information about
the LEDs and Table 2 for information about beep coding. In the figure below, bucking means
that Fortress is reducing high input voltage, and boosting means Fortress is increasing low input
voltage.
An LED on the rear panel of the U model Fortress (labled Site Wiring Fault) lights to indicate a
wiring fault in the circuit to which the Fortress is connected. If this LED is on, the outlet needs to
be checked and repaired by an electrician. Do not use this outlet until it has been repaired and
verified safe.
Steady: Fortress is operating on AC line.
Blinking: Fortress is bucking or boosting input AC line.
A
B
C
D
A, B, C, and D indicate
battery charge:
A, B, C & D = 75-100 %
B, C & D = 50-75 %
C & D = 25-50 %
D = 0-25 %; if D flashes,
less than 2 minutes
of runtime remain.
A, B, C, and D indicate
per cent of full load:
A, B, C, & D = 75-100%
A, B, & C = 50-75%
A & B = 25-50%
A = 0-25%
A, B, C, & D, with D
flashing, load = 110%
or higher.
A = UPS Fault; Fan Fail or Overcharge
C = UPS shutdown due to output overload.
B = UPS failed the battery test.
B & C = UPS shutdown from communication
at RS-232, remote shutdown or SNMP.
A & B = UPS shutdown due to main relay
failure or short circuit on output.
A & C = UPS over-temperature shut down.
D C
B
A
750 model
1050, 1425,
1800 and
2250 models
