Vertiv | Liebert PEX4 | User Manual 56
Controller Operating Instruction
Chapter 3: Controller Operating Instruction
3.1. HMI Display
PEX4 unit uses ‘Global HMI 9-inch Color Display Board’, as shown in Figure 3-1 with following characteristics:
1. Menu-based operation, monitors and displays the operation status of precision cooling air-conditioning
equipment, it also keeps the control environment within the set range.
2. It has power-down self-recovery function such as high and low voltage protection, phase loss protection,
reverse phase protection and other functions.
3. The menu operation provides an accurate understanding of the system’s main parameters and operational
status.
4. Expert fault diagnosis system, can automatically display the current fault content, helps maintenance
personnel for equipment maintenance.
5. It can display 500 historical alarms.
6. Congured CAN interface, using CAN communication protocols.
Figure 3-1 HMI Screen Display Panel Main Interface
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