26 Chapter 4 Operator Control And Display Panel
Liebert APM 90 Integrated Modular UPS User Manual
Chapter 4 Operator Control And Display Panel
This chapter expounds the functions and use of the components on the operator control and display
panel of the UPS, and provides LCD display information, including the LCD screen types, detailed menu
messages, prompt windows and alarm list.
4.1 Introduction
The operator control and display panel is located on the front door of the UPS. It is the access point for
operator control and monitoring of all measured parameters, UPS and battery status and alarms. The operator
control and display panel is divided into three functional areas: mimic power flow chart, LCD display with
menu keys, control keys, as shown in Figure 4-1. The components of the operator control and display panel are
described in Table 4-1.
3
1
4
5
2
6
STATUS
EPO
INVERTER ON
INVERTER OFF
FAULT CLEAR
SILENCE ON/OFF
F1 F2 F3 F4 F5
Control keysMimic power flow chart
R
APM 90
LCD display with menu keys
12: 30: 36
Press any key back to main menu
Figure 4-1 Operator control and display panel
Table 4-1 Component description of operator control and display panel
Indicator No. Function Control key Function
1 Rectifier indicator EPO EPO switch
2 Battery indicator INVERTER ON Inverter start switch
3 Bypass indicator INVERTER OFF Inverter shutdown switch
4 Inverter indicator FAULT CLEAR Fault reset switch
5 Load indicator SILENCE ON/OFF Audible alarm silencing switch
6 Status indicator F1
~
F5 LCD menu keys
4.1.1 LED Indicators
The LED indicators mounted on the mimic power flow chart represent the various power paths and current
UPS operational status. The indicators are described in Table 4-2.
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