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UTILITY POWER
During normal operation, the UPS monitors the utility power and delivers power to the connected
equipment. If your system is experiencing excessive periods of high or low voltage, have a certified
electrician check your facility for electrical problems. If the problem continues, contact the utility
company for further assistance.
Online
The online indicator illuminates when the UPS is drawing utility power and performing
double-conversion to supply clean power to the connected equipment.
Utility
Voltage
266
248
229
210
192
The UPS has a diagnostic feature that displays the utility voltage. Plug the UPS into the
normal utility power.
Press and hold the
button to view the utility voltage bar graph display. After a few
seconds the five-LED display on the right of the front panel shows the utility input volt-
age. Refer to the figure at left for the voltage reading (values are not listed on the UPS).
The UPS starts a self-test as part of this procedure. The self-test does not affect the volt-
age display.
The display indicates the voltage is between the displayed value on the list and the next
higher value. For example, with three LEDs lit, the input voltage is between 229 and 248
VAC.
If no LEDs are lit and the UPS is plugged into a working AC power outlet, the line volt-
age is extremely low.
If all five LEDs are lit, the line voltage is extremely high and should be checked by an
electrician.
Bypass
This LED illuminates to indicate the UPS is in Bypass mode. Battery backup is not
available while in this mode. Utility power is being sent directly to connected loads.
The UPS transfers to this mode due to a command received via the computer interface
port or after a UPS internal fault.
Fault
This LED illuminates to indicate the UPS has detected an internal fault. See the Trou-
bleshooting section for details.
B
ATTERY POWER
If the utility power fails, the UPS can provide power to the connected equipment from the batteries
for a finite period. The UPS sounds an alarm—four beeps every 30 seconds—while operating on
battery. The alarm stops when the UPS returns to online operation.
On
Battery
When the On Battery indicator is lit the UPS is supplying power to the connected
equipment from its batteries.