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| Liebert® XDO | User Manual
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6.5. Maintenance of Filter Net
1. To ensure the effective operation of the filter net, the unit controller is provided with a filter net maintenance alarm logic.
2. The default fan running time is 2160 hours (the running time can be set according to the local operating environment),
which corresponds to the filter net maintenance alarm trigger point.
3. The filter net must be checked once a month during use, and the user should replace it in time according to the status of
the filter net.
4. Turn off the power supply before replacing the filter net. After replacing the filter net, reset the fan running time to zero.
There is a filter net at the front and the rear of the unit, located under the electric control box. Loosen the two M5 fixing
screws to replace the filter net, as shown in Figure 6-1
ITEMS
DESCRIPTION
ITEMS DESCRIPTION
1
Filter Net
2
Remove the two M5 screw to replace the filter
Figure 6-1
Remove Filter Net
6.6. Maintenance of Fan Components
The regular inspections include the status of the fan impeller, the fixation of fan components, abnormal fan noise, and fan-
related cabling connections.
1. Pay special attention to whether the fan assembly and the wind guide ring are firmly installed, and if there is any possible
chance of rubbing the nearby sheet metal parts with the rotating blades.
2. Check for any sign of abnormal airflow channel blockage, if identified eliminate it immediately to prevent any harm to the
cooling system and other relevant system components from the reduction of air volume.
3. Check if the EC fan is abnormal or does not rotate properly, if identified then check the analog signal cabling, speed
feedback cabling or power supply cabling of the power module, and also check the power module as well.
4. The automatic adjustment of the electronic expansion valve (EEV) ensures that enough refrigerant is supplied to the
evaporator to meet the requirements of loading conditions. By observing and measuring the temperature of superheat
and the opening of the EEV , user can determine whether the EEV is operating normally.
Note1: Do not operate and maintain the fan during the rotation of the fan blades to avoid injury.
Note2: During the operation of the unit, it is forbidden to touch the fan net cover to prevent mechanical damage caused
by the rapid rotation of the fan
