POWER FAILURE DETECTED BY DSU(ALARM)

[phrankie]

Hi all,
i have the alarm below in one of my systems, i have changed out the Power board,DSU,LSU and LPU5 boards but the alarm is still there any ideas on what i may be missing out?

102 POWER FAILURE DETECTED BY DSU
DATE TIME ALP NOIF EQU INF1 INF2
04JUN10 08:15:17 3 1 001-0-**-** 1 2

thanks in advance.

Phrankie!

 

[doktor]

It could be your ring generator REU, that has been switcheed off...

///doktor

 

[phrankie]

thanks doktor,
if it is my ring generator shouldn't it affect the ringing of @ least some phones? there is currently no such cases,this is why i am wondering.

thanks
Phrankie!

 

[doktor]

Most of the times I see this: "102 POWER FAILURE DETECTED BY DSU" it is the ring generator...

///doktor

 

[whosrdaddy]

INF2 = 2 which means that you are missing -12V voltage.

This could be caused by a faulty extension board, pull out all boards of magazine 1 one for one and see if the alarm dissapears (except DSU offcourse). If the alarm stays then the DC-DC converter needs to be replaced.

There should be a red alarm led on the DC-DC converter (PU4DC, RG5DC, ...) in case of problems...

/Daddy

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[phrankie]

thanks a lot guys for your help so far...

@doktor,
my power board is RG5DC???

@whosrdaddy
i have pulled out the various boards one after the other,the alarm is still there.

any more ideas?

thanks
Phrankie!

 

[whosrdaddy]

isn't there a red alarm led on your RG5DC, if so, you must replace it.

/Daddy

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[phrankie]

no there is no red led, all led are green


phranke!

 

[mdloser]

Have you notice any problems in the system ? If not try CNREC:LIM=1,REU=NO;

 

[phrankie]

thanks guys find below my alarms,
@mdloser
this is after CNREC command
<ALLOP;
ALARM LOG
IDENTITY: NLNG-CON-OFF
VERSION: CXP1010101/4/TSWSP02/R3A

DATE: 22JUN10 TIME: 16:05:04
CLASS: 4
102 POWER FAILURE DETECTED BY DSU
DATE TIME ALP NOIF EQU INF1 INF2
22JUN10 15:59:05 2 1 001-0-**-** 1 2

CLASS: 3
278 CIL DATA LOST FOR ONE OR MORE OUTPUT UNITS
DATE TIME ALP NOIF UNIT EQU INF1
22JUN10 16:01:25 3 2 CLOP 001-*-**-** 2

CLASS: 2
344 CIL, FAULTY CONNECTION TO NIU PORT
DATE TIME ALP NOIF EQU BRDID INF1
22JUN10 15:58:58 1 1 001-0-60-04 106 0


LAST ALREI: 22JUN10, 15:58:58

END
<
thanks
phrankie!

 

[whosrdaddy]

CNREC will not help since the alarm is about missing -12V not about missing ring voltage.

phrankie, take a digital multimeter and measure the tensions on the testpins of the RG5DC. If you ruled out that a board in the magazine is causing this, then you have 2 options: the RG5DC is malfunctioning and needs to be replaced OR the magazine has a problem.

/Daddy

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[aastratech]

Phrankie have you just recently upgraded the switch???

 

[phrankie]

@mdevo
no i did not do any upgrade.

@whosrdaddy
i will do the measurement but assuming its the magazine as you mentioned, what should i do and how do i know for sure that its the magazine?

thanks again!

Phrankie!

 

[whosrdaddy]

i will do the measurement but assuming its the magazine as you mentioned, what should i do and how do i know for sure that its the magazine?

very simple, swap RG5DC with another magazine and see if alarm stays or moves. (if it stays it is the magazine OR some board in the magazine)

/Daddy

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