Dust Filter; Fan Kit - Liebert CRV+ Series User Manual

switches and heating over-temperature protection switch, and replace the component if it is found loosened or in poor
connection.
7. Replace the electric components that are detected faulty, such as faulty control fuses (or MCBs) and control
boards.
8. Check the specification and aging situation of the control cable and power cable between the indoor unit and the
condenser, and replace the cable when necessary.
9. Use temperature/humidity measuring meter with high precision to proof-read and calibrate the
temperature/humidity sensor.
10. Regulate the setting point, and inspect the action of various function components according to the control logic.
11. Simulate and inspect the working states of protection units such as high/low pressure alarm, high/low temperature
alarm, high water level alarm and over-temperature protection.
12. Check the following sensors.
Water leak detector
Lay water leak detectors and confirm alarm information through the controller.
The detector should be placed away from any water pool or drainage trench on the floor, 2m ~ 2.5m away from the
unit. Do not place it directly under the machine. The recommended location for the water leak detector is shown in
Figure 6-1.
Warning
1. Before connecting any mechanical parts or cables, make sure the power supply of the control unit has been disconnected.
2. Do not use the water leak detector adjacent to flammable liquid or use it to detect flammable liquid.

6.2 Dust Filter

The efficiency of the configured filter is 30%, in compliance of the America ASHRAE52-76, Eurovent 4/5 standard,
and the dust resistance value is 90% (EU4 standard). To ensure effective operation, the controller has set the filter
maintenance and alarm logic. The fan operating time is 2160 hours by default (the operating time is settable
according to local operating environment, refer to Appendix 4 Parameter Setting Table), and the filter maintenance
alarm is triggered. You should check and replace the filter according to its dust and clogging condition. During using
period, the filter should be checked once a month and replaced as required.
Cut off the power before replacing the filter. Clear the fan operating time after replacing the filter.

6.3 Fan Kit

EC fan
The regular checking including motor operating status, fan impeller state, fan kit fixation and cooperation clearance
between the fan and the wind-leading ring.
Location of water
leak detector
Location of water
leak detector
Figure 6-1 Recommended location for the water leak detector
Liebert CRV+ Series Air Conditioner User Manual
Chapter 6 System Operation And Maintenance
Liebert unit
Drain pipes on the ground
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