Chapter 6 System Operation And Maintenance; Monthly Routine Inspection Items; Routine Inspection Items (Half A Year) - Liebert PEX+ Series User Manual

Chapter 6 System Operation And Maintenance

This chapter introduces the operation and maintenance of the Liebert.PEX+ AC, including routine maintenance and
inspection items, electrical connection inspection, control component appearance checking, and air cooled condenser,
filter , infrared humidifier and electric heating maintenance guidance.
During the operation of the Liebert.PEX+ , lethal voltage may be present in theequipment.It is a must to obey all the notes
and warnings marked on the equipment or contained in this manual, otherwise injury or fatality may occur.
Only qualified maintenance personnel can operate and handle the equipment.

6.1 Monthly Routine Inspection Items

Check the system components monthly, focusing on system function and component wearing symptoms, and the
inspection items are shown in Table 6-1.
Components
Filter
Fan
Compressor
Air cooled condenser
Cooling system
Heating system
Infrared humidifier

6.2 Routine Inspection Items (Half A Year)

See Table 6-2 for the routine maintenance items every half a year.
Components
Filter
Fan
Table 6-1 Monthly routine inspection items
Check if filter is clogged and damaged.
Clean the filter
Check if fan blades are distorted.
No leakage
Check for noise and observe vibration condition
Cleanliness of condenser fins
Fan base is rigid.
Check if vibration absorbing cushion is aging or damaged
Check if SPD board(if any) is working, and check once a week in
thunderstorm seasons.
Refrigerant pipes have suitable support
Check refrigerant pipes
Check the moisture condition in system through sight glass
Check HGBP valve (if HGBO system is equipped)
Check thermal expansion valve
Check water inlet/outlet temperature for unit with dual cooling sources
or free cooling unit
Check if the condensed water pan is clogged
Check the operation of reheat system components
Check eroding condition of components
Check if water pan drainage is clogged
Check the lamp of humidifier
Check water pan for mineral deposits
Table 6-2 Routine maintenance items every half a year
Check if filter is clogged and damaged
Clean the filter
Check if fan blades are distorted.
Bearings in good condition
Check and fix connectors
Liebert. PEX+Series Precision Air Conditioner
Chapter 6 System Operation And Maintenance
Inspection items
Inspection items
User Manual
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