Operation Description Of Hmi; Initial Interface; Main Menu Interface - Liebert LSF24 User Manual

The keys and LCD are on the upper right corner of the fan speed controller, as shown in Figure 3-1. Their appearance
is shown in Figure 3-2.

3.3 Operation Description Of HMI

3.3.1 Initial Interface

The LCD will display alternately 'F01' and the bigger one of condensing pressure 1 and condensing pressure 2 when
the fan speed controller is powered on initially. The 'F01' is the maximum pressure logo. However, the pressure value
will be displayed as '88.8' on the LCD upon the following occasions:
1. The pressure sensor is not installed,
2. The short jumper cap of current pressure sensor is not installed.
3. The pressure sensor is disabled.
The show order is shown in the following figure (the '16.1' is only an example, and the actual value is determined by
the sampling result).

3.3.2 Main Menu Interface

Press the ESC key on the initial interface, the main menu interface will appear on the LCD. The main menu interface
includes the analog main menu interface, current alarm main interface, historical alarm main menu interface and
configuration main menu interface. Press the UP key and DOWN key to select the different main menu interface, and
press the ENT key to enter the submenu of the current main menu on the main interface. The switching operation
processes and orders of the main menus are shown in the following figure.
Analog main
menu interface
ENT key
F01
DOWN key
F
- - A
UP
Current alarm
key
main interface
Liebert PEX Condenser User Manual
Chapter 3 Application Of Fan Speed Controller
LCD
ESC key
UP key DOWN key
Figure 3-2 Keys and LCD
16.1 F01
DOWN key
- - H - -
UP
key Historical alarm main
menu interface
DOWN key
UP key
16.1
DOWN key
C - -
UP
key Configuration main
menu interface
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