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Operation 3-5
Front Panel Indicators
The front panel LED display colors indicate the UPS status:
■ Green LEDs indicate normal conditions
■ Red LEDs provide warning of existing or potential problems
LEDs are referred to as LED 1 through 16, as described in this documentation.
When the UPS is in Configure mode, the LEDs do not operate as they do in
the Standby and Operate modes (see Chapter 4, “Configuration”).
Front Panel LEDs in the
Standby and Operate Modes
Each LED (and the condition it indicates in the Operate and Standby modes) is
described in the following tables:
AC Input (LEDs 1-4)
Table 3-1
AC Input LEDs
LED Color Meaning
1 Red The utility voltage is higher than the voltage range for which the
UPS has been configured. The UPS is supplying battery power.
The audio alarm will sound.
Flashing Red Utility voltage has returned to the voltage range for which the UPS
has been configured. The UPS is supplying utility power. The
audio alarm should be reset.
2 Green Utility voltage is within the voltage range for which the UPS has
been configured.
3 Green Utility voltage is lower than the current UPS configuration expects.
The UPS is compensating and providing power to the loads
without the use of batteries.
4 Red The utility voltage is lower than the voltage range for which the
UPS has been configured. The UPS is supplying battery power.
The audio alarm will sound.
Flashing Red Utility voltage has returned to the voltage range for which the UPS
has been configured. The UPS is supplying utility power. The
audio alarm should be reset.