Vertiv | Liebert PEX4 | User Manual 62
Controller Operating Instruction
3.4.2. Menu
Press the MENU button to enter the respective sub-menu options to be viewed and set the system state as
shown in Figure 3-7.
Figure 3-7 Menu
3.4.3. Alarm Menu
Current Alarms: Press the Alarm menu icon in the main menu to enter the page as shown in Figure 3-8. It
contains two pages: Alarm Status and Alarm History. The current alarm page is used to monitor the current
alarm status record of the AC unit, indicating no alarm or specic alarm status information. Specic alarm status
information includes serial number, alarm content, alarm time, as shown in Figure 3-8.
The latest Alarm SN is the largest number. Press the Up or Down button to scroll through the status records
if more than one alarm is activated. Up to 500 historical alarm records can be stored. They will not be cleared
upon system Power-OFF.
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