Vertiv Liebert CR012 - Chapter 4 Maintenance & Troubleshooting; 4.1 Routine Maintenance & Inspection (Monthly)

Liebert CR012 Precision Air Conditioning User Manual
Chapter 4 Maintenance & Troubleshooting 51
Chapter 4 Maintenance & Troubleshooting
This chapter deals with the system operation and maintenance of the Liebert CR012 range of air conditioners. In this
chapter, the following points or items will be discussed to help users get to grips with the routine inspections and
checks from a user-perspective. It includes the maintenance of electrical parts and connections, refrigerant system
maintenance guidelines, routine monthly and bi-annual checklists, and drainage system maintenance among others.
It also discusses the basic troubleshooting which can be understood from a user perspective.
⚫ Prior to operation and maintenance, the lethal voltage may be present in the equipment which can be fatal. All notes,
warnings, and cautionary warnings marked on the equipment as well as the ones mentioned in the manual must be
considered, otherwise, it may lead to injury and fatality.
⚫ Disconnect local and remote power supplies before operating or working with the equipment.
⚫ Qualified and Professional Maintenance personnel are the ones supposed to operate and handle the equipment.
Careful and cautionary measures are conveyed to the professional personnel and therefore, only those personnel may
perform maintenance on these machines.
⚫ Check the label of the components of the unit as well as the manual to ensure all aspects are considered before
operation and maintenance.
⚫ Follow all the local codes, protocols, and regulations prior to maintenance.
Read all the instructions to verify that all the parts are included and check the nameplate to ensure that the voltage
matches the available utility power.
4.1 Routine Maintenance & Inspection (Monthly)
Following is a checklist which contains parts and components that are to be checked to ensure proper and accurate
functionality. In addition to that, there may be wear and tear of the equipment.
Therefore, it is essential that all the checks are performed to ensure a smooth flow in operations. Table 4-1 depicts
the inspection tasks and actions that need to be implemented and carried out every month during maintenance of the
various components in the CR012 air conditioners.
Table 4-1
Components
Item
Remark
Filter
Check for clogging or damage
Check the filter clogging switch
Clean the filter
Fan
The Fan blades are not distorted
The bearings are not worn out
Compressor
Check for leakage
Listen to the operation sound, observe the operation vibration
Air cooled
condenser
Make sure that the condenser coil is clear from dirt and debris. Clean if required.
The fan base should be firm
The fan vibration absorber is not deteriorated or damaged
The SPD board should be effective (in the seasons when there are storms, the SPD board
should be checked once a week)
The refrigerant pipes are properly supported
Refrigeration
system
Check the suction pressure
Check the discharge pressure
Check the refrigerant pipes for signs of leaks
Check the moisture condition in the system through the sight glass
Check the electronic expansion valve
Heating system
Check the re-heater operation
Check the erosion on the components