Chapter 1 Overview 3
Liebert.CRV+ Series Air Cooled Precision Air Conditioner User Manual
Filter drier
The filter drier can effectively eliminate the moisture in the system and filtrate the impurities generated during
long-term system operation so as to ensure the normal system operation.
Micro-processing controller
The CRV+ air cooled AC unit uses EMERSON micro-processing controller which adopts advanced PID regulating
technology. The micro-processing controller adopts the LCD screen with blue backlight (small board: white backlight;
large board: blue backlight) and 240 × 128 dots (small board: 128 × 44; large board: 240 × 128). The user interface
operation is simple. The multi-level password protection can effectively prevent illegal operation. It also provides
power failure auto-restoration function and high/low voltage protection function. The operation time of components is
available through the menus. The expert-level fault diagnosis system can automatically display the current fault
information, facilitating the maintenance. It can store up to 200 historical event records. An RS485 port is configured,
and Modbus protocol is used.
Remote Monitoring Software
The CRV+ air cooled AC unit adopts Modbus protocol. Through the configured RS485 port or TCP/IP port, the
Liebert.CRV+ system can communicate with the host computer and receive the control of the host software.
1.5 Refrigerant Requirement
Poor quality or counterfeit refrigerant will damage the system severely. Please use the refrigerant approved by
Emerson. For the system abnormity or damage caused by using poor quality refrigerant, the warranty will be invalid.
Please do not use poor quality refrigerant. For any result caused by using poor quality refrigerant, the
warranty will be invalid.
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