Rotary Switch; Figure 5 Rotary Switch - Liebert 30-130kVA Operation And Maintenance Manual

The SELECT button is used to select a particular item from the options on the screen. When you
press this button, the screen that is selected will be immediately displayed.
The UP and DOWN buttons are used to move the cursor around the screen in order to highlight
appropriate selections.
The ALARM SILENCE button silences the audible alarm and discontinues the flashing of the alarm
messages.
The ALARM RESET button clears a latching alarm after the alarm condition is corrected.
The ESCAPE button is used to exit the screen and return to the Mimic Display.
3.1.3

Rotary Switch

The Rotary Switch is located on the lower right side of the panel inside the cabinet. This switch pro-
vides single-point control of the UPS.
NOTE
Improper positioning of the rotary switch can result in unwanted actions. Therefore it is
important to read the complete instructions before using this switch, and to follow Operator
prompts on the display screen.
Figure 5 Rotary switch
The Rotary Switch has 3 positions:
• NORMAL: The Normal switch position is used under most operational conditions.
• BYPASS: The Bypass switch position directs the power flow through the Internal Bypass Circuit.
The UPS module may be either on or off. If the UPS module is on and the batteries require charg-
ing, charging will take place.
• SERVICE: The Service switch position directs the load to the Internal Bypass Circuit so the UPS
can be serviced.
NOTE
For purposes of this manual, assume that the rotary switch will always be in the NORMAL
position.
NOTE
If the position of the rotary switch must be changed, as in servicing, it is imperative that the
Operator observe the light in the corner of the Rotary Switch panel before making any change.
The switch position may be changed only if the light is green. Never move the switch if the light
is red. Instead, call the Liebert Global Services technician.
NOTE
The LED light is positioned in the lower left-hand corner.
17
Operation