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Chapter 4 Operation Modes
y
Standby Mode
When the input voltage and frequency of the utility AC power are within the normal range, the UPS
runs in standby mode and charges the batteries. The bypass and the inverter have no output.
BYPA.
MAIN
LOAD
Batteries
Rectifier
Inverter
(Figure 4-2: Path of Electrical Power through the UPS in Standby Mode)
y
ECO Mode
The UPS can be set in ECO mode manually. In ECO mode, when the utility input voltage is within
the ±10% range of rated voltage, the load is supplied by the utility power and the BYPASS LED
indicator (
BYPASS
) illuminates (yellow); if out of the range, the load is supplied by the inverter
and the NORMAL LED indicator (
NORMAL
) illuminates (green).
BYPA.
MAIN
LOAD
Batteries
Rectifier
Inverter
(Figure 4-3: Path of Electrical Power through the UPS in ECO Mode)
