Emerson 1000 User Manual

The five LEDs illuminate with a steady glow to indicate battery capacity. Battery capacity is shown 

for five seconds after the Status Change button is pressed. The LEDs show the battery capacity as a 

range, ± 5% The LEDs’ battery level meanings and colors are:

LEDs on the display panel illuminate with a steady glow or flash to indicate the UPS’s status:
Normal Mode—The Normal Mode indicator illuminates (LED 9) with a steady glow when utility 

power is available and within the input specifications.
Battery Mode—The Battery Indicator illuminates (LED 10) with a steady glow when the UPS is 

operating on battery
AVR Boost, AVR Buck—When the UPS is in AVR Boost/Buck Mode, the LED display will indicate 

the relative load level on the output of the UPS and will flash LED 1 (boost) or LED 2 (buck) to indi-

cate which mode the UPS is in.
Weak Battery—When the UPS battery voltage is low, the LED display will indicate the relative load 

level on the output of the UPS and LED 3 will flash as a warning.
Site-Wiring Fault—In case of a site-wiring fault, the LED display will indicate the relative load 

level on the output of the UPS and LED 4 will flash as a warning.
Overload—When UPS operates in overload status, the LED display will indicate the relative load 

level on the output of the UPS and LED 5 will flash as a warning.

100-76% — Green

75-51% — Green

50-26% — Yellow

25-11% — Yellow

10% or less — Red

Normal Mode

Green

Steady

AVR Boost

Green

Flashes

Green

Steady

AVR Buck

Green

Flashes

Green

Steady

Battery Mode

(dark start)

Yellow

Steady

Weak Battery

Yellow

Flashes

Site-Wiring Fault

Yellow

Flashes

Overload

Red

Flashes

Battery Fault

Shutdown

Yellow

Steady

Red

Steady

Overload

Shutdown

Red

Steady

Red

Steady

UPS Output

Abnormal

Shutdown

Yellow

Steady

Red

Steady