HC900 Hybrid Controller Installation and User Guide

Removal and Replacement Procedures - Safety Considerations - PLAN AHEAD!

154 HC900 Hybrid Controller Installation and User Guide Revision 5

9/03

Battery Replacement Procedures

Table 37 - Replacing a Backup Battery (CPU Powered))

Step Action

If the battery is removed from the Controller Module when AC power is not

applied, the content of SDRAM will be lost.

Before beginning this procedure, upload and SAVE a copy of the configuration, or ensure that a

previously SAVEd copy of the current configuration is available.

2. Apply site AC power to the Power Supply that is associated with the controller Module..

Open the plastic door at the top of the Controller

Module.

Press the latch on the battery cover to the right to

release the battery holder, and use the molded-in

extension on the battery holder to extract the

holder.

Note the orientation of the battery-holder assembly

(battery toward the left).

The battery is retained in the holder by spring

tension of the plastic holder itself.

Extract the battery from the holder by using your

thumb to apply pressure to the front end of the

battery, and rotating it to the left.

Insert the negative end of the new battery into the

back end of the holder, and press on the battery so

that it snaps into the holder.

To ensure that the battery is seated properly, rotate

it in the holder, using finger or thumb pressure

toward the positive (front) end of the battery.

While maintaining proper orientation (battery toward the left), slide the battery holder into the

slot in the Controller Module until it snaps into place.