Best Power Fortress 750 VA Guide D'utilisateur page 20

Appendix A: Adjusting Voltage Settings
When the unit is not sounding an alarm, you can use the button shown below to change the
following:
• Nominal Voltage — The normal voltage the UPS is programmed to expect, and the nominal UPS
• Buck — The input voltage at which the Fortress decreases voltage before providing output because
the input voltage is too high.
• Boost — The input voltage at which the Fortress increases voltage before providing output because
the input voltage is too low.
• Transfer to Inverter — The point at which the UPS switches to inverter (battery power), either
Note: Make sure you want to change these values before you start the procedure below. Once
you press the button shown for 10 seconds, the values will change to the default values,
and any previous changes you have made will be lost. If you have a question, contact
the nearest Best Power office, or call Worldwide Service at 1-800-356-5737 or 1-608-
565-2100.
Do not change voltage settings when unit is operating on
inverter. To change the values, follow these steps:
1. Press the button shown until the LEDs on the front of the
Fortress blink. After the LEDs blink, three will stay lit and
the Fortress will beep for one second.
2. The LEDs that are lit show which voltage settings are selected. The LEDs are numbered in the
drawing below to help you identify them.
possible combination of LEDs.
For example, by default, LEDs 2, 3 and 4 will be lit (see
diagram). If your UPS is a U model, you will find this
combination of LEDs in the first row of Table 4. This row
shows the following:
• With 96 volts input or lower, the Fortress switches to
battery power.
• When input voltage drops to 109, the Fortress begins
to increase the output voltage.
• 120 is the nominal or expected input voltage.
• When input voltage rises to 130, the Fortress begins to decrease the output voltage.
• With 146 volts input or higher, the Fortress switches to battery power.
ENGLISH
output voltage under line loss conditions.
because AC input voltage is very low or because it is very high.
Tables 4 and 5 show the voltage settings for each
1
2
3
4
5
6
LED Numbers
16
Press this
button for 10
seconds (until
all of the lights
blink).
1
2
3
4
5
6
Default Setting