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Chapter 1 Precision Air Conditioner Controller
ENTER
DOWN
ENTER + UP
ENTER + DOWN
1.3 Indicator
The controller provides two indicators: operation indicator and alarm indicator, as shown in Figure 1-1.The functions
are described in Table 1-2.
Indicator
Operation indicator
Alarm indicator
1.4 Control Interface
The LCD screen displays the communication state after the controller is powered on. If the controller can not
communicate with its target interface board, the LCD screen will prompt Communication Failure. If the
communication is normal, the screen will display shutdown interface or main interface, which depends on whether the
air conditioner is on or off. The control interface includes main interface, shutdown interface and password interface.
1.4.1 MAIN Interface
If the air conditioner is powered on, after successful communication, the main interface will appear, as shown in Figure
1-2. If no control key activity within 10min, the controller will display a screen-saving state (the back lighting is off). In
the main interface, press Enter to view main menu.
The main interface provides the following information: date, time, week day, display board and interface board
addresses, actual temperature, temperature set point, actual humidity, humidity set point, unit working icons (including
fan, cooling, humidifying, dehumidifying, heating, general alarm, locking and on/off/standby state).
2) If the input data field is a toggle selection, pressing the key can scroll through the available options.
3) When a menu is displayed on several screens, pressing the key can scroll up.
Press this key to enter the next menu, or save the setting after parameters are changed.
1) Press this key to move down the cursor or decrease the value of the displayed parameter during
parameter setting.
2) If the menu is a toggle selection, pressing the key can scroll through the available options.
3) When a menu is displayed on several screens, pressing the key can scroll down.
1) It is a key combination. Press the ENTER key, then UP key, release the UP key, then ENTER key to
complete a key operation.
2) The key combination is used to view the state of previous air conditioner.
1) It is a key combination. Press the ENTER key, then DOWN key, release the DOWN key, then ENTER
key to complete a key operation.
2) The key combination is used to view the state of next air conditioner.
Table 1-2 Function descriptions of indicators
Color
Green
Red
Liebert. PEX+Series Precision Air Conditioner User Manual
Status
On
The controller is working normally
Off
The controller is not working normally
On
No alarm is generated
Blinking
An alarm is generated
Function descriptions
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