3A. Lights
The UPS has three lights on the front panel: the green light, the yellow light, and
the red light. 120-volt models also have a small red Site Wiring Fault light above the
DIP switches on the back panel. The paragraphs below explain what each light means.
When this light is on (steady, not blinking), the UPS is using the utility
power it receives when you plug it in. The UPS conditions this power and
protects your equipment from power problems. If you are not displaying
one of the bar graphs (see
), the display shows the percent of
the UPS’ power that your equipment is using.
If the green light is blinking while the yellow light is on, utility power is available, but
the UPS is not using it because of high or low voltage or other power problems. If the
input power problem continues, the UPS will continue to run on battery power until it
uses up its battery backup time. To adjust the UPS’ sensitivity to utility power problems,
see
When this light is on (steady, not blinking), the UPS is using its batteries to
provide power to your equipment. This happens during a power outage or
when there is a severe problem in the power your UPS is receiving. If you
are not displaying one of the bar graphs (see
flashes the number of minutes the UPS can provide battery power (backup
time or runtime), and the UPS beeps regularly.
If this light is on while the green light is blinking, the UPS is running on battery power
because of a problem in the input power, not because of a power outage. The UPS must
run on battery power to provide the best power to your equipment. To adjust the UPS’
sensitivity to these power problems, see
When this light is blinking, the UPS is performing a battery test to make sure it can pro-
vide enough backup time. The UPS does the battery test automatically every 30 days;
you can also start a test by pressing and holding the key. (See
When this light is on or flashing, the UPS is warning you that something
is wrong. The UPS helps you identify the source of the problem in two
ways: 1) by flashing a two-letter alarm message, and 2) by sounding the
Morse Code for an alarm letter. The
you identify the alarm using either the alarm message or the Morse Code.
To silence the alarm, press and hold . The display will show “Sh”
briefly, and the red light will be steady (not blinking or flashing).
120-volt models have a light on the back panel in the lower right corner.
If this light is on, the outlet the UPS is plugged into needs repair. Plug
the UPS into another outlet and call an electrician to repair the faulty
outlet.
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Site Wiring Fault Light
