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14
Chapter 5 Maintenance
This chapter describes routine maintenance, alarm and fault handling, and replacing parts of the power system.
Note
1. The maintenance must be conducted under the guidance of the related safety regulations.
2. Only trained personnel with adequate knowledge about the power system shall maintain the inner part of the subrack power
system.
3. There is a dangerous voltage at AC side, and the grid must be disconnected when maintaining the AC side.
5.1 Routine Maintenance
Inspect the power system periodically and shoot the trouble in time. The routine maintenance items are given in Table
5-1.
Inspection item
DC output
Indicators of the
rectifier and the
controller
Rectifier fan
5.2 Handling Alarms And Fault
5.2.1 Handling Controller Alarms
You can query the controller alarms through LCD screen of the controller.
Alarm type
The controller alarms are classified into three types: critical alarm, observation alarm and no alarm.
Critical alarm: These two types of alarms have strong impacts on the system performance. Whenever these alarms
are generated, you should handle them immediately. The alarm indicators (see Figure 5-1) will be on and audible
indication will be given.
Observation alarm: When this type of alarm is raised, the system maintains normal output for a while. If the alarm
occurs during watch time, it should be handled immediately. If the alarm occurs during non-watch-time, handle it
during watch time. The alarm indicators (see Figure 5-1) will be on when the observation alarm occurs.
No alarm: Alarms set as 'no alarm' by the users, will generate no visible or audible indication and the system works
normally.
Chapter 5 Maintenance
Table 5-1 Routine maintenance items
Frequency
Inspecting method
Once half a year
Multimeter
Once half a year
Visual inspection
Once half a year
Visual inspection
NetSure 2100 A31-S1 Subrack Power System User Manual
Guide
Measure the voltage between the load MCB and the DC
output positive busbar. Check that the voltage is normal
Refer to 5.2.1 Handling Controller Alarms and 5.2.2
Handling Rectifier Fault
If the fans are dusty, the fans should be dusted or cleaned
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