Chapter 3 Application Of Fan Speed Controller 11
The keys and LCD are on the upper right corner of the fan speed controller board, as shown in Figure 3-1. Their
appearance is shown in Figure 3-2.
LCD
ENT key
DOWN key
ESC key
UP key
Figure 3-2 Keys and LCD
3.3 Operation Description Of HMI
3.3.1 Initial Interface
The LCD will alternately display ‘F01’ (the maximum pressure logo) and the larger of condensing pressure 1 and
condensing pressure 2 when the fan speed controller is powered on initially. However, the pressure value will be
displayed as ‘88.8’ on the LCD if:
1. The pressure sensor is not installed.
2. The jumper cap of current pressure sensor is not installed.
3. The pressure sensor is disabled.
The display order is shown in Figure 3-3 (the ‘16.1’ is only an example, and the actual value is determined by the
sampling result).
F01
16.1
F01
16.1
Figure 3-3 Display order of the initial interface
3.3.2 Main Menu Interface
Press the ESC key on the initial interface, and the main menu interface will appear on the LCD. The main menu
interfaces include the analog main menu interface, current alarm main menu interface, historical alarm main menu
interface and configuration main menu interface. Press the UP key and DOWN key to select a 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 Figure 3-4.
F
A
H
C
DOWN key
DOWN key
DOWN key
UP
key
UP
key
UP
key
DOWN key
UP key
Configuration main
Analog main
Current alarm main
Historical alarm main
menu interface
menu interface
menu interface
-
-
-
-
-
-
-
-
menu interface
Figure 3-4
Switching operation processes and orders of the main menus
Liebert.PEX Condenser User Manual