Vertiv | Liebert XDH | User Manual
65
System Operation And Maintenance
5.
Check the connection between the control terminals (37#, 38#, and CANH/ CANL) of the cables and the control
interface board.
6. Check whether the contact and connection of the fan power cable, signal cable, and rotating speed feedback
signal cable are firmly fixed.
7. Check whether the interconnection terminals between the control interface board and the temperature
or pressure sensor are firmly fixed. If there is any loose, poor contact, or fault, immediately replace the
interconnection terminal.
8.
Replace the faulty electrical components such as the control fuse (or air breaker) and control board.
9. Use the temperature and humidity measurement meter with high precision to measure and calibrate the
reading of the temperature and humidity sensor.
10. Adjust the setpoints. Check the motion of each functional component according to the control logic.
7.5.Filter Maintenance Guidance
A filter net is mounted on the rear side of the unit. To ensure the normal operation of the filter, the filter
service alarm logic is provided by the controller. The default fan running time is 2000 hours (depending on the
local running environment), the filter service alarm will be triggered when the time is exceeded. Based on its
obstructed condition, the filter needs to be replaced. The filter must be checked for its condition once a month,
and be replaced as required during operation.
7.6.Maintenance Guidance for Fan Kit
• Periodic inspection includes the state of the fan impellers, fastening of fan components, abnormal noise of
the fan, and cable connection of the fan.
•
Pay close attention to assess whether the fan kit and impeller are properly fixed, and the rotation of fan blade
does not physically interfere with other components. Ensure that the air discharge path is free from any
obstacles to the airflow.
• If the EC fan does not rotate, check the analog signal cable, rotating speed feedback cable, power cable of
the power module, and the power module.
• Do not operate and maintain the fan in a running condition to avoid any injury to the operator or damage
the fan blades.
• During the unit operation, do not touch the fan cover as it may lead to mechanical damage to the unit by
the rotating fan blades.
