Operation
59 Liebert
®
eXM
™
7.2.2 Startup in ECO Mode
The bypass indicator remains green to indicate that the load is supplied by the bypass input. The
inverter indicator will flash green to indicate that the inverter is on standby in ECO Mode.
1. Verify that input power is available.
2. Select ECO Mode on the Control Panel.
3. Verify that the Bypass indicator remains green to indicate that the load is supplied by the bypass
input.
The UPS is now operating in ECO Mode.
7.2.3 Switching Between UPS Operation Modes
To switch from Normal Mode to Static Bypass Mode—Press the INVERTER OFF button to
switch to Bypass Mode (see Figure 28).
To switch from Normal Mode to ECO Mode—Select ECO Mode using the Liebert eXM control
panel. After a 5-minute qualification of the bypass voltage, the UPS will transfer to bypass.
The Bypass indicator on the MIMIC display will illuminate green to indicate that the UPS is
operating properly with input power form the bypass input. The Inverter indicator will flash green to
indicate that the Inverter is on standby operating in ECO mode.
To switch from ECO mode to Normal Mode—When the UPS is in ECO Mode, press the
INVERTER ON button. After the inverter enters normal operation, the UPS transfers to Normal
Mode.
7.3 UPS Battery Start
The Battery Start option permits starting the Liebert eXM with power supplied only by the batteries
(at charged condition).
NOTICE
Risk of loss of power to the connected load. Can cause equipment damage.
Before attempting to start the UPS without utility power present, ensure that the batteries
are fully charged—over 2.1V per cell—and will supply adequate run time to the load. Load
requirements may deplete batteries that are not fully charged an may cause an unintended
UPS shutdown.
1. Verify that the battery cabinet is properly connected (see Figure 26) and that the battery breaker
is closed.
2. Press the Battery Start button on the front panel of any Liebert Power Module assembly for
2 seconds.
The LCD displays the start screen, and the battery indicator flashes green. It stops flashing and
becomes solid green about 30 seconds after the rectifiers enter normal operation.
3. Press and hold the INVERTER ON key for two seconds, and the UPS will begin operating in
Battery Mode.
NOTE
In ECO Mode, the load is being powered by the utility as long as the bypass source remains
within set limits.
NOTE
In Static Bypass Mode, the load is being powered by the utility and is not protected from
fluctuations in input power: spikes, sags and failure.
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