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4—2
If desired, the UPS can be set up to operate at a known, fixed frequency regardless of the
detected utility frequency. Fixed-frequency operation is often desirable in installations that
make use of cold-start capability. Discussion on this is in the Advanced Configuration Section
(section 6) of this manual.
If utility power is present and within specifications, your UPS will start up in bypass mode. Power
will be supplied to your computer loads and will be protected from a utility loss. The utility power
present, green indicator " ", will be lit.
If utility power is not present, your UPS will start on battery until utility power is restored. No
diagnostics will be performed in this case.
4C. Battery Operation
Battery Mode: Utility power is outside specifications and computer loads are now powered
On by UPS battery source.
Bypass Mode: Utility power is present and within specification limits.
On
Inverter On Mode: Utility power is available but is outside specification limits.
On
Flashes
Battery Low:
A low battery warning will sound. Acknowledge the alarm by depressing the
Flashes
grey push button. Immediately save your work and shut down connected
computer loads to prevent data loss. The actual time to reach "low battery" can
vary significantly depending on the critical loads and condition of the batteries.
4D. UPS Shutdown
At any time, your UPS may be shut down by depressing the "Off" red button. Make sure to hold
the
button down for 2 seconds (prevents accidentally turning off your UPS). You will hear an audible
"beep" confirming the button has been depressed.
4E. Front Panel Display Functions
LED Operation
There are six status LEDs, arranged in a vertical column just above the control buttons. Icons
to the right of each indicator indicate the function. The status indicated by each LED is listed
below, in the order that they appear on the front panel (top to bottom):
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