Vertiv Liebert CR012 - Chapter 3 Micro-Controller; 3.1 Micro-Controller; 3.2 Control buttons

Liebert CR012 Precision Air Conditioning User Manual
34 Chapter 3 Micro-Controller
Chapter 3 Micro-Controller
This section contains content related to the Controller, basic System maintenance, and Routine Troubleshooting
which enables the customer to get to understand the functioning of the equipment. It helps customers gain insight into
the inner workings of the product comprising of information such as System Setup, Alarm menus, and Basic
Maintenance.
3.1 Micro-Controller
The Micro-controller for CR012 air conditioners comes packed with features that help to monitor and manage the AC
unit.
Figure 3-1 depicts the appearance of the micro-processing controller:
Figure 3-1 Appearance of the micro controller
3.2 Control buttons
The micro-controller provides 5 control buttons as depicted in Figure 3-2:
Figure 3-2 Control Buttons
The table 3-1 includes the detailed functions of the control buttons:
Table 3-1
Control button
Function descriptions
ON/OFF button
Press this button for 3s to turn on or turn off the AC unit
Enter button
(ENT)
Enter the selected menu screen. Validate the parameter setting value
Esc button
(ESC)
Exit the current menu and return to the Main screen or previous menu screen. Abort parameter change;
silence the audible alarm
Up button
Move the cursor up or increase the parameter value. For a toggle selection: scroll through the options. For a
multi-screen menu: scroll up the screen
Down button
Move the cursor down or decrease the parameter value. For a toggle selection: scroll through the options. For
a multi-screen menu: scroll down the screen