201 Front Panel Lights; 202 Front Panel Keys And Display - Unity I UT3K Manuel D'utilisation

200 Operation
Once you start the UNITY/I UPS, it operates automatically. The UNITY/I keeps you informed of its status with its front
panel lights and four-digit display. If you wish, you can also use the front panel keys and four-digit display to view
information about the UPS. In addition, the UPS has alarms that will alert you to UPS conditions that require your
attention.

201 Front Panel Lights

The lights on the front panel tell you several things about the operating status of the UPS. The four lights at the top of
the front panel are explained below. For an explanation of the nine small lights by the front panel keys, see Section
202.
When the LINE light is off, the UPS is not receiving adequate AC input power to run on line (because of a power
outage or a severe power problem). In most cases, when the LINE light is off, the BATTERY light will be on.
When the UPS is in bypass mode, it continues to power your connected equipment, but the UPS does not regulate the
AC power going to the connected equipment, and the UPS will not provide battery backup power. The UPS does
continue to provide lightning protection, noise protection, and isolated output.
Note: If the BYPASS light is on even though the UPS keyswitch is turned to "Auto" and the unit is not indicating an
A-16 alarm, the UPS may have automatically placed itself in bypass mode because it detected a problem with its
circuitry. Call Best Power's Worldwide Service (see Section 402).

202 Front Panel Keys and Display

The front panel keys and four-digit display make it easy for you
to display information about the UPS. The word above each
key tells you what information the UPS will display if you
press that key. The words below the keys tell you what infor-
mation the UPS will display if you press the two keys at the
same time.
When you use the keys to display information, a small green
light near the key(s) you pressed lights to tell you what
information is currently displayed (Figure 8). The information
remains on the display until you press another key.
LINE Light (Green)
When the LINE light is on, the UPS is filtering and regulating AC
line power to provide computer-grade power to your equipment.
BATTERY Light (Yellow)
When the BATTERY light is on, the UPS is providing power
from its batteries.
BYPASS Light (Yellow)
When the BYPASS light is on, the unit is in internal bypass
mode. Either the front keyswitch has been turned to "Bypass," or
parameter 63 has been enabled (see Section 300).
ALARM Light (Red)
When the ALARM light is on, the UPS is alerting you to an
alarm condition. See Section 204.
Figure 8
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