Nortel DMS-100 Series Maintenance Manual page 662

Outside plant access cabinet (opac)

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Table of Contents

13-14 Routine maintenance procedures

Battery inspection and cleaning

At the OPAC site

297-8211-550 Standard 05.01 August 1999

Possible system damage

You can add or remove battery strings from an active

OPAC. If you perform this action make sure the

battery strings are in the open circuit state from the

MAP terminal. Turn off the associated battery charger

controller (BCC) card NT8X02AB. Connect or

disconnect the battery cables at the back of the

cabinet. After you connect the affected battery

strings, return the battery strings to the load bus one

string at a time.If there is no MAP terminal control,

turn off the BCC before you connect or disconnect any

battery strings..

Possible loss of service during battery replacement

Do not turn off more than one NT8X02 at a time. If

you turn off more than one NT8X02 at a time service

is lost if ac power is interrupted. Turn off BCC0 when

you perform work on battery strings 0, 1, or 2. Turn

off BCC1 when you perform work on battery string 4,

Turn the appropriate BCC NT8X02 power switch to the OFF position.

Disconnect and remove matched battery string or strings from the affected shelf

or floor area.

Clean the affected areas with baking soda and water. Continue until the

cleaning solution does not foam when you apply the cleaning solution.

Dry all cleaned areas completely and replace the batteries.

Reconnect the battery string or strings.

Turn the BCC NT8X02 power switch to the ON position.

Troubleshooting