Power Problem with a G3r

njodonnell · January 20th, 2007, 10:07 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?

martinyoung · January 22nd, 2007, 09:02 AM

Open the back doors of the MCC cabinet, on the bottom right are a series of circuit breakers. Are they all on? If not, turn them on. Does that solve the problem?

njodonnell · January 22nd, 2007, 12:07 PM

Thanks Marty,

I did check the circuit breakers and they are all on. It does appear to be a breaker for each carrier but again they are all on. I even turned each breaker off then on after powering down the G3r of course. I’m still thinking that it is the AC Distribution Unit unless there may be another reason for this power problem.

martinyoung · January 22nd, 2007, 01:51 PM

At this point I would have Avaya or a Business Partner take over the problem. If you look at the power distribution unit you will see a large white plug with a lot of wires in it that plugs into the unit. That cable represents power connections to several parts of the PBX. It is possible that the parts within the power distribution unit for the wires leading to carriers B and C (maybe even D and E if you had those carriers) might be bad and a new distribution unit is required. That unit is not field repairable.

The good news is that it does not take long to replace it, I have done it in less than ten minutes. And, yes, when it fails the failure is seldom a complete failure. It is also possible that the problem is one of the fuses in that power supply. Those can be replaced if it is one of them.

January 20th, 2007, 10:07 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?

January 22nd, 2007, 09:02 AM	#2 (permalink)
martinyoung Moderator Join Date: Dec 2005 Posts: 1,376	Re: Power Problem with a G3r Open the back doors of the MCC cabinet, on the bottom right are a series of circuit breakers. Are they all on? If not, turn them on. Does that solve the problem? __________________ Marty Retired Avaya DSIC tech

January 22nd, 2007, 12:07 PM	#3 (permalink)
njodonnell PBXtech SILVER 25+ posts Join Date: Oct 2004 Posts: 46	Re: Power Problem with a G3r Thanks Marty, I did check the circuit breakers and they are all on. It does appear to be a breaker for each carrier but again they are all on. I even turned each breaker off then on after powering down the G3r of course. I’m still thinking that it is the AC Distribution Unit unless there may be another reason for this power problem.

January 22nd, 2007, 01:51 PM	#4 (permalink)
martinyoung Moderator Join Date: Dec 2005 Posts: 1,376	Re: Power Problem with a G3r At this point I would have Avaya or a Business Partner take over the problem. If you look at the power distribution unit you will see a large white plug with a lot of wires in it that plugs into the unit. That cable represents power connections to several parts of the PBX. It is possible that the parts within the power distribution unit for the wires leading to carriers B and C (maybe even D and E if you had those carriers) might be bad and a new distribution unit is required. That unit is not field repairable. The good news is that it does not take long to replace it, I have done it in less than ten minutes. And, yes, when it fails the failure is seldom a complete failure. It is also possible that the problem is one of the fuses in that power supply. Those can be replaced if it is one of them. __________________ Marty Retired Avaya DSIC tech

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