46 Chapter 7 Maintenance
NetSure 801 AG1 Power Supply System User Manual
Fault
Related alarm
Fault cause
Proposal
Protection indicator on
(yellow)
Rectifier
protection
No current sharing
Check the rectifier communication
whether nomal or not. If not, continue
to check the connection of
communication lines. Replace the fault
rectifier when it works normally
PFC output overvoltage protection
Change the position of the abnormal
and normal rectifiers. Replace the
abnormal rectifier if it cannot work
normally all the same
AC input voltage exceeding the normal range
Ensure the AC input voltage whether in
normal range or not
Protection indicator
flashing (yellow)
Rectifier
communication
failure
Rectifier communication failure
Check the communication lines
connection whether well or not
Fault indicator on (red) Rectifier failure Overvoltage
Remove the abnormal rectifier and
restart. Replace the rectifier if it occurs
overvoltage again
Fault indicator flashing
(red)
Rectifier fan
fault
Fan fault
Replace new fan
Fault description
1.Internal short-circuit of rectifier
The rectifier will automatically exit the system in case of internal short-circuit.
2.Damage to partial rectifier
In case of damage to partial rectifiers, if the remaining undamaged rectifiers are able to meet the power supply
requirements of loads, just turn off the AC input switches of the damaged rectifiers.
3.Rectifier output overvoltage
The overvoltage of a single rectifier will not cause the overvoltage protection of all rectifiers. However, if overvoltage
protection occurs to all rectifiers, the system cannot recover automatically.
Treatment: turn off the AC input switches of all rectifiers and remover the rectifier to disconnect it. At this time, the
system voltage should be below 56.4V. Then insert rectifier one by one and turn on the AC input switches to observe
the output current of it. When the AC input MCB of a certain rectifier is switched on, its output current is obviously
bigger than that of the others. When the system voltage is higher than 56.4V, the rectifier with bigger output must be
faulty Replace it. If all the rectifiers show the same symptom, you must turn off the monitoring and rectifiers and then
restart the rectifiers.
Notice
Notice
During the treatment of rectifier fault, delete the address code of the closed rectifier in the rectifier parameters setting through the
controller and set the rectifier quantity as the number of the rectifiers that operate normally, then the rectifier fault alarm will be
eliminated.
Replacing rectifier
After finding the rectifier faults, follow the steps as below to replace it:
1. Check the new rectifier to see whether has any damage during the transportation.
2. Loosen the fixing screw on the panel of the rectifier.
3. Dial the slide switch of the rectifier to the above.
