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16
Chapter 5 Maintenance
No.
Alarm
11
AC Voltage Low
12
Rect Protect
5.2.2 Handling Rectifier Fault
When the rectifier has any other component failure except rectifier fan, the rectifier needs to be replaced. Therefore,
do not disassemble or replace any part of the rectifier other than the fan.
The symptoms of usual rectifier faults include: run indicator (green) off, protection indicator (yellow) on or blinking, fault
indicator (red) on or blinking.
The indicators of the rectifier are shown in Figure 5-2.
The handling methods of rectifiers are given in Table 5-4.
Indicator
Color
Run
Green
indicator
Protection
Yellow
indicator
Fault
Red
indictor
When the mains voltage is lower than 176V, the output power of the rectifiers will be derated.
When the mains voltage is lower than 80V, the rectifiers will stop working. If the mains voltage is
under the AC under-voltage value, the mains grid should be improved
Check if the mains voltage is above 305V or under 80V. If the mains voltage is under the AC
under-voltage value or above the AC over-voltage value, the mains grid should be improved
Figure 5-2 Rectifier indicators
Table 5-4 Handling methods of rectifiers
Normal
Abnormal
state
state
On
Off
No input or output voltage
AC input voltage exceeds normal range
PFC output OverVolt/LowVolt
protection
Current sharing imbalance strongly
On
Rect over temp:
Off
1. Fan blocked
2. Ventilation path blocked at the inlet
or vent
3. Ambient temperature too high or the
inlet too close to a heat source
Blinking
Rectifier communication interrupted
Rectifier over-voltage
Fuse fault
On
Off
Rectifier current sharing imbalance
(current imbalance degree＞±5％)
Blinking
Fan fault
NetSure 2100 A31-S1 Subrack Power System User Manual
Handling method
电源指示灯（绿色）
Run indicator (green)
保护指示灯（黄色）
Protection indicator (yellow)
Fault indicator (red)
故障指示灯（红色）
Cause
Make sure that there is input voltage
and output voltage
Ensure AC input voltage is normal
Replace the faulty rectifier with a new
one
Replace the faulty rectifier with a new
one
1. Remove the object that blocks the
fan
2. Remove the object at the inlet or
vent
3. Decrease the ambient temperature
or remove the heat source
Check whether the communication
cable is properly connected
Restart the rectifier. If the protection is
triggered again, replace the rectifier
Check whether the rectifier outputs
over-voltage. If not, replace the
rectifier
Replace the rectifier
Replace the fan
Handling method
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