Vertiv | Liebert PEX+ Chilled Water | User Manual 87
System Operation and Maintenance
Chapter 7: System Operation and Maintenance
Regular system maintenance is critical to ensure the reliability and the eectiveness of the product. This chapter
describes Liebert® PEX+CW system maintenance, including information related to routine maintenance and
inspection, electrical connections inspection, cabling, system diagnosis, visual appearance checks, and drainage
maintenance.
• During the running of Liebert PEX+CW, there may be lethal voltage within the device. The system must
therefore comply with all cautions and warnings mentioned in this manual or which may cause
casualties.
• Only qualified service and maintenance personnel can perform system operation and maintenance.
7.1. Routine Maintenance Inspection Items (Monthly)
Components of the monthly inspection system, focusing on whether the system function is normal and whether
the components show any signs of wear and tear, refer Table 7-1 the monthly routine maintenance inspection
items.
Table 7-1 Monthly Routine Checklist of Items
Part Check Item Remark
Air Filter
Check for clogging or damage
Check the filter clog switch
Clean the filter
Fan Check fan blades are not distorted
Chilled Water System
Check chilled water pipes
Check chilled water inlet/outlet temperature
Check if the condensed water pan is clogged
Electrical heating system
Check the re-heater operation
Check the erosion situation of the components
Infrared humidifier
Check clogging of the drain pipes
Check the lamps of the infrared humidifier
Check the mineral sediments on the water pan
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