34 — APC 24 W 12 V dc UPS unit data sheet
34-4 July 2008 Alcatel-Lucent 7342 ISAM FTTU ONT R04.05.06
ONT Product Information Manual Edition 01 3FE 51892 AAAA TCZZA
Figure 34-1 UPS icons and description
UPS model prior to FGH 1.0.5 (ANSI)
For the UPS model before FGH1.0.5, there are four operating modes:
• Normal: Under normal operating conditions, both green lights are on and the red
light is off. The load receives its power from the utility. The battery charge is
maintained.
• On-Battery: During a commercial utility outage, the UPS supplies the load from
battery power. The green DC Output LED light is on and the green AC Present
LED light is off.
• Low-Battery: When the UPS operates on battery for extended periods, the battery
charge is depleted, and the UPS shuts down. In this case, all lights are off. The
UPS remains off until utility power is restored.
• Overload: When the UPS shuts down due to an overload, the green DC Output
LED light is off. After 30 s, the UPS automatically restarts.
The UPS has three LEDs on the front panel. The operating mode can be determined
by the state of these LEDs; see Table 34-3.
Table 34-3 UPS LEDs for model prior to FGH 1.0.5
Note — The battery recharges to at least 90% of full capacity in 24 h.
LED name Status OFF Status ON
AC Present (green) No ac power present Operating on ac power
DC Output (green) The UPS has overloaded. If both AC
Present and Battery Bad LED lights are off,
the UPS battery has shut down.
12 V output is present. If the AC Present
LED light is off, the UPS battery is in use.
Battery Bad (red) Battery and/or ac power is in use. If both
AC Present and DC Output LED lights are
off, the UPS battery has shut down.
Battery needs to be replaced.
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