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njodonnell · January 20th, 2007, 11:07 AM

I have a G3r and it has a MCC with A,B and C carriers. The power modules(631D) on carriers B and C are in a Major Alarm. The power modules in carrier A are both fine. I replaced the 4 power modules in carriers B and C and they also are in Major Alarm. I then swapped the power modules from carrier A to carrier B and the power modules in carrier A were not alarming. Therefore, it appears that the power modules are not causing the major alarms. Of course all the circuit packs in carriers B and C are not working and all the circuit packs in carrier A are working fine. The only other item that may be causing the problem would be the AC Distribution Unit located at the bottom of the MCC. But why would the AC Distribution Unit only affect carriers B and C and not A?

January 20th, 2007, 11:07 AM	#1 (permalink)
njodonnell PBXtech SILVER 25+ posts Join Date: Oct 2004 Posts: 46	Power Problem with a G3r I have a G3r and it has a MCC with A,B and C carriers. The power modules(631D) on carriers B and C are in a Major Alarm. The power modules in carrier A are both fine. I replaced the 4 power modules in carriers B and C and they also are in Major Alarm. I then swapped the power modules from carrier A to carrier B and the power modules in carrier A were not alarming. Therefore, it appears that the power modules are not causing the major alarms. Of course all the circuit packs in carriers B and C are not working and all the circuit packs in carrier A are working fine. The only other item that may be causing the problem would be the AC Distribution Unit located at the bottom of the MCC. But why would the AC Distribution Unit only affect carriers B and C and not A?