ONS15454 Power Failure B

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Nov 12th, 2008
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While installing an ONS 15454 today, we encountered a power issue that blew our 30amp fuse in the dc Telect panel. After replacing the fuse (and also found defect red power cable from fuse panel to ONS), power was re-applied. After logging into the box, we had major alarms stating PWR B Side failure. We checked the voltage off the dc fuse panel which checked good. After reading the pdf files, I saw nothing mentioned of fuses onboard the ONS itself. Any suggestions of what circuit pack or common card is causing this alarm? I am trying to avoid swapping out the chassis and cards all together. Any help would be appreciated. Thanks.

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techuser1 Wed, 11/12/2008 - 17:49
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The exact message was something like "Bat Fail B".

Tom Randstrom Wed, 11/12/2008 - 18:30
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Have you checked the Release Notes for the software release you are running? There may be a known bug regarding this hang-up.

It is also possible that a power trace was destroyed.

There is a fuse on the AIP card, which is a non-orderable part number. However, a fuse blowing on the AIP usually takes out the fan tray assembly.

Contact Cisco TAC for more troubleshooting.

techuser1 Wed, 11/12/2008 - 18:33
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We are running rel 8.5

I did notice that the red LED on the fan tray was lit but did not notice (in my frustration) if there was an alarm.

Where is the power trace you mentioned? Is that in the AIP?

techuser1 Wed, 11/12/2008 - 18:44
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Also, is the AIP pre-installed on the chassis? The engineer stated they did not install one. Also, we are using the fan tray 15454-FTA3-T.

Tom Randstrom Wed, 11/12/2008 - 18:56
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The AIP comes pre-installed on the chassis (not orderable as a separate item). It is a PCB located behind the Lower Backplane Panel (in the middle of the lower shelf).

If the unit is bad, you will need to contact TAC and they will have to provide a unit and explain the installation procedure.

Tom Randstrom Wed, 11/12/2008 - 19:11
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The traces are located on the PCB that the power lugs are attached to.

It doesn't sound like an AIP from what is stated in the reference guide (partial below)......


1.7.3 Alarm Interface Panel

The AIP is located above the alarm contacts on the lower section of the backplane. The AIP provides surge protection for the ONS 15454 ANSI. It also provides an interface from the backplane to the fan-tray assembly and LCD. The AIP plugs into the backplane using a 96-pin DIN connector and is held in place with two retaining screws. The panel has a nonvolatile memory chip that stores the unique node address (MAC address). The MAC address identifies the nodes that support circuits. It allows Cisco Transport Controller (CTC) to determine circuit sources, destinations, and spans. The TCC2/TCC2P cards in the ONS 15454 ANSI also use the MAC address to store the node database.

Note The 5-A AIP (73-7665-XX) is required when installing fan-tray assembly 15454-FTA3 or 15454-CC-FTA, which comes preinstalled on the shelf assembly (15454-SA-ANSI or 15454-SA-HD).

Note A blown fuse on the AIP board can cause the LCD display to go blank.

1.7.4 Alarm Interface Panel Replacement

If the AIP fails, a MAC Fail alarm appears on the CTC Alarms menu and/or the LCD display on the fan-tray assembly goes blank. To perform an in-service replacement of the AIP, you must contact the Cisco Technical Assistance Center (Cisco TAC).

You can replace the AIP on an in-service system without affecting traffic (except Ethernet traffic on nodes running a release earlier than Software Release 4.0). The circuit repair feature allows you to repair circuits affected by MAC address changes on one node at a time. Circuit repair works when all nodes are running the same software version. Each individual AIP upgrade requires an individual circuit repair; if AIPs are replaced on two nodes, the circuit repair must be performed twice. Always replace an AIP during a maintenance window.

techuser1 Wed, 11/12/2008 - 19:23
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There were no MAC alarms displayed in the CTC alarms and there was visible readout on the fan LCD display. I will try swapping the fan tray and/or the entire chassis tomorrow morning. Hopefully that will work.


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