OPTI-UPS ES1500C - Manual (Page 16)

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2.4 Status Indication
UPS Status Indication: Front Panel LED
ES550C, ES800C
AC Mode
When this Green LED is lit, the UPS is in normal
mode, and providing power to your equipment.
The UPS will continue to filter and provide surge
protection.
Battery Mode
When this Yellow LED is lit, the UPS is providing
power from its battery. Also, this LED is lit when
you press the button to test the battery.
Battery Fault
This Red LED indicator indicates two statuses of
the UPS: When this Red LED is on, it indicates
that the battery needs to be replaced. When this
Red LED is flashing rapidly, it indicates the UPS is
over load.
ES1000C, ES1500C, ES1000C-RM, ES1500C-RM
AC Mode
When this Green LED is lit, the UPS is in normal
mode, and providing power to your equipment.
The UPS will continue to filter and provide surge
protection.
Boost
When this LED is lit, the UPS is correcting a
brownout. The UPS raises the output voltage
approximately 15 % higher than the input voltage
without using any battery power.
Battery Mode
When this Yellow LED is lit, the UPS is providing
power from its battery. Also, this LED is lit when
you press the button to test the battery.
Buck
When this LED is lit, the UPS is correcting an
overvoltage. The UPS lowers the output voltage
approximately 13% lower than the input voltage
without using any battery power.
Battery Fault
This Red LED indicator indicates two statuses of
the UPS: When this Red LED is on, it indicates
that the battery needs to be replaced. When this
Red LED is flashing rapidly, it indicates the UPS is
over loaded.