Chapter 4 Maintenance
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RDU501 Intelligent Monitoring Unit User Manual
Figure 4-4 RDU501 command line interface
Issue 3
: How do I troubleshoot a sensor?
Fault phenomenon 1
: The intelligent sensor has no display and cannot be displayed on the RDU501 web page.
Answer: Take following steps below to troubleshoot:
1) Confirm whether the intelligent sensor is connected to the SENSOR port of the RDU501. At the same time, the
address “1” within the group can only be connected to SENSOR1, and the address “2” within the group can only be
connected to SENSOR2.
2) Check if the connecting cable is intact, the connector crimping wire is intact, and whether it is a direct-through
cable;
3) Check if the intelligent sensor is normal;
4) Make sure the sensor address is not 00;
5) If multiple intelligent sensors are connected, make sure the sensor addresses are not duplicated and follow the
steps 2 and 3 one by one.
Fault phenomenon 2
: The alarm indicator of the intelligent sensor is always on.
Answer: Return the intelligent sensor to the service center of the Vertiv office.
Fault phenomenon 3
: There are intelligent communication failure alarms in the RDU501 historical alarm.
Answer: Check that the cable clamp is intact. Check if the cable connection is loosened.
Issue 4
: After the alarm is generated, no email or SMS notification is received, or if the alarm is not ceased, the
number of email or SMS notifications is less than 3. How to deal with it?
Answer: Take following steps below to troubleshoot: