Vertiv | Liebert® CRV4 | User Manual 87
System Operation and Maintenance
Refrigeration
system
Check the discharge pressure
Check the refrigerant piping
Check the moisture condition in the system through the sight glass
Heating system
Check the re-heater operation
Check the erosion situation of the components
Check and fasten the circuit connection
Electrical control
part
Check the fuse and the MCB
Check and fasten the circuit connections
Check the control program
Check the contactor action
8.3. Self-Diagnosing Functions
The micro controller has a built-in diagnostic function that helps to turn On/O the components and check
their functionality.
8.4. Maintenance of Electrical Control Utilities
In this section, the following processes will be discussed in brief, namely-
1. Maintenance of Electrical Parts
2. Maintenance of Control System
3. Water Leak Detector
8.4.1. Maintenance of Electrical Parts
Visual checks and handling need to be carried out to check the correctness of electrical connections for the
following items:
1. Conduct the electrical insulation test on the system to nd out bad electrical connections and contacts.
Disconnect all the fuses and MCBs of the control part during the test as high voltage from the insulation test
could damage the components.
2. Check the contactors prior to powering On the unit to ensure that the contactors can hold and un-hold
freely.
3. Clean the electrical and control components o dust with brush or dry compressed air.
4. Check the closing of contactors for arcs or signs of burning. Replace the contactors, if required.
5. Fasten all the electrical connection terminals.
6. Check that the sockets and plugs are in good conditions. Replace the contactors, if required.
7. If the power cables are damaged, get them replaced by a qualied/ certied electrician.
To Next Page
Loading...
Need help?
General
