35 — APC 150 W 48 V dc UPS unit data sheet
Alcatel-Lucent 7342 ISAM FTTU ONT R04.05.06 July 2008 35-3
3FE 51892 AAAA TCZZA Edition 01 ONT Product Information Manual
35.4 Operating modes
There are four operating modes as follows:
• Normal: Under normal operating conditions, the green LED light is on and the red
LED light is off. The load receives its power from the utility and battery charge
is maintained.
• On-Battery: During a commercial utility outage, the UPS supplies the load from
battery power. When operating in On-Battery mode, the AC Present LED light is
yellow.
• Low-Battery Shutdown: When the UPS operates on battery power for extended
periods, the battery charge is depleted and the UPS shuts down. In this case, all
LED lights are off. The UPS remains in the Off condition until utility power is
restored and no battery current is drawn.
• Overload Condition: When the unit shuts down due to an overload, the unit
automatically restarts after 5 s.
35.5 Status LEDs
Three indicator LEDs are present on the front of the UPS. Each LED is labeled with
an icon. These icons, with their meanings, are shown in Figure 35-1. The operating
mode can be determined by the state of these LEDs; see Table 35-2.
Figure 35-1 UPS icons and meanings
Table 35-2 LEDs
Note — The battery recharges to at least 90% of full capacity in 48
hours.
Name Color Description
AC Present Green Operating on ac power
Green Flashing High-charge mode
Yellow Operating on battery
DC Output On Green DC output present
Battery Bad Red Battery missing or needs replacement
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