Emerson 115-120 Manuel D’Utilisation

The control panel and LCD on the front of the Liebert

®

 APM

™

 lets the operator:

• Turn the UPS On or Off.
• Transfer into the various operating modes.
• Silence alarms.
• Check the status of the UPS and its batteries, including all measured parameters, events and 

alarms.

The main areas of the control panel are shown below in Figure 51 and explained in Table 23.

• Mimic Display - view the status of the Liebert APM in single-line diagram format—indicators 

show status by changing color when ON, flashing or OFF

• Liquid Crystal Display (LCD) and Navigation keys - view status and operational data from 

the Liebert APM in tabular format

• Control buttons - turn the Liebert APM on or off, silence alarms

1

Rectifier indicator (AC to DC)

EPO

EPO switch

2

Battery indicator (backup DC power)

INVERTER ON

Inverter start button

3

Bypass input indicator

INVERTER OFF

Inverter shutdown button

4

Inverter indicator (DC to AC)

FAULT CLEAR

Fault reset button

5

Load indicator (AC output)

SILENCE ON/OFF

Alarm mute button

6

UPS status and alarm indicator

7

Audible alarm (buzzer)

8

Protective cover for EPO button

F1 through F4 and HELP

LCD menu keys

NOTE
Help button menus are not active. Future units will ship with an F5 legend in place of the 

TM