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Error Message Distribution Fuse/Breaker Failure (Red light on controller, Relay #4)
Explanation
1.
2.
Recommended Action
1.
2.
3.
4.
5.
Note
Error Message High Load (Yellow light on controller)
Explanation
Recommended Action
1.
2.
Error Message Module Failure (Red light on controller and Module, Relay #3)
Explanation
1.
2.
3.
Recommended Action
1.
2.
3.
Cisco AC/DC Power System User Guide, R1.0
5-2
Tripped breaker
Fuse blown
Localize the faulty breaker or blown fuse
Verify there are no short circuits in the cabling to the load
Reset breaker. If it trips again there is a problem with the breaker or the load
Replace breaker if required
Verify that there is no blown fuse. (If so, replace the blown fuse.) If the fuse blows again, there
may be a problem with the load
Due to proprietary alarm wiring, a voltage will appear at the load terminal of the fuse even when
the fuse is open. The voltage comes from a high impedance circuit used for blown fuse detection
when a load is connected. This is not an energy hazard.
Load current exceeds 75%
Check load current versus installed rectifier capacity. The alarm is generated when output load
reaches 75% of rectifier capacity.
Add rectifier or reduce load.
Module failure
AC Off on a single rectifier
Current sharing fault
Verify that the AC supply to the failed module is present at the right voltage.
Remove the faulty module, wait 30 seconds, and re-insert it. Wait up to four minutes for the
controller to re-establish communication. If the module is still faulty, replace it with a new
module.
Verify module address and resolve any address duplication
switches are located at the inside rear of the rectifier shelf.
Chapter 5
System Troubleshooting
(Figure
5-1). Rectifier address DIP
May 2006
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