Rotary Switch; Advisory Display; Figure 3-5. Rotary Switch And Advisory Display - Liebert 300 series Installation, Operaton & Maintenance Manual

3.1.4 Rotary Switch

The Rotary Switch is located in the lower part of
the recessed panel. This switch provides single-
point control of the UPS. See Figure 3-5.
NOTE
Single-point control simplifies start-up
and operation the UPS. However, read
of
instructions carefully before operating
the Rotary Switch. Improperpositioning
of Rotary Switch could result in
unwanted actions. FoZZow userprompts
on display screen.
The five Rotary Switch positions are:
Position 0, "Off ", disconnects all power to
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load; UPS is shut down. All alarms and
indicators are inoperative; no power is
supplied to the load through UPS.
Position 1, "On Bypass", connects the critical
l
load to input power through the Maintenance
Bypass Line. UPS Module is de-energized for
maintenance purposes.
Position 2, 'UPS Start", connects power to
l
controls, rectierkbarger, inverter, and
initiates tests on UPS components, while the
load is supplied through the Maintenance
Bypass Line.
Position 3, "UPS Check", connects the battery
l
DC walk-in, and static bypass line, while the
load is supplied through the Maintenance
Bypass Line.
Position 4, "On UPS", cmmects the critical
l
load to the UPS Module and establishes
normal operation.
CAUTION
Do not operate Rotary Switch during a
failure. Doing so will result in an
power
immediate loss of power to the load.
34 Installation, Operation and Maintenance Manual (8195)

3.1.5 Advisory Display

The Advisory Display is located above the
A band labeled 'Pause"
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A clockwise (advance) arrow
l
A counterclockwise (return) arrow.
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Each is highlighted with an LED. See
Figure 3-5.
The Advisory Display guides operators through
start-up and shutdown, as directed by the
internal control system. The Advisory Display
indicates (with illumination of the appropriate
LED) whether to turn the Rotary Switch to the
next clockwise position or to previous
counterclockwise position. The Advisory Display
"Pause") not to turn the Rotary Switch during
start-up tests or during a power failure. All
three Advisory Display LEDs extinguish when
the Rotary Switch is to remain in Position 4
during normal operation.
Figure 3-5. Rotary Switch and Advisory
Display