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22 Chapter 4 Troubleshooting
NetSure 731 A41 Subrack Power System User Manual
4.2 Rectifier Fault Handling
Alarm handling
The symptoms of usual rectifier faults include: power indicator ( green ) off, protection indicator ( yellow) on,
protection indicator blink , fault indicator (red) on and fault indicator blink, the indicator locations as shown:
Figure 4-5 Local Indicator Locations
Table 4-2 Rectifier Troubleshooting
Symptom Related alarm Possible cause(s) Suggested action(s)
Power Indicator
(Green) Off
No alarm
1
．
No input/output voltage.
Make sure that there is input/output
voltage
2
．
Internal input fuse open. Replace the rectifier
Power Indicator
(Green) flashing
No alarm
The rectifier is being identified by the
controller
Protection
（
yellow
）
Rect protection AC input voltage abnormal
Make sure the AC input voltage is
normal
Rect over temperature
1. Fan blocked 1. Remove the object that blocks the fan
2. Ventilation path blocked at the inlet
or vent
2. Remove the object at the inlet or vent
3. Ambient temperature too high or
the inlet too close to a heat source
3. Decrease the ambient temperature or
remove the heat source
Rect protection Current sharing imbalance
Check whether the rectifier
communication is normal. If not, check
whether the communication cable is in
normal connection. If the
communication is normal while the
protection indicator is on, replace the
rectifier
Rect protection
Power factor compensation internal
under voltage or over voltage
Replace the rectifier
Protection indicator
flash (yellow)
Rect communication fail Rectifier communication fail
Check whether the communication
cable is in normal connection
Fault indicator on(red)
Rect HVSD Rectifier over-voltage
Reset the rectifier. If the protection is
triggered again, replace the rectifier
Rect fail
Rectifier module addresses
contradictory.
Replace the rectifier module.
Severe load sharing
imbalance.
positive and negative deviations of
average current ≤ 2.5A
Check whether the rectifier
communication is normal. If not, check
whether the communication cable is in
normal connection. If the
communication is normal while the
protection indicator is on, replace the
rectifie
Fault indicator flash
(red)
Rect Fan Fails Fan fault Replace the fan.
R48-3000e3, R48-3000A3, R48-3500e3 Replacement
Rectifier modules can be inserted or removed with power applied (hot swappable).