StorageWorks HSZ20 Lead Acid Battery Replacement Instructions

This document provides step-by-step instructions for replacing the lead-acid battery in an HSZ20 controller.

Key Safety Warning:

• Lead acid batteries are high-energy devices. Avoid contact between battery tabs and any conductive surfaces to prevent injury or equipment damage.

Required Tools:

• Flat-Head, Phillips-Head, and #10 TORX-Head screwdrivers.
• Electro-Static Discharge (ESD) Wrist Strap (mandatory for battery removal and installation).

Procedure Overview:

1. System Shutdown:
   • Shut down the system or terminate all jobs using the HSZ20 subsystem.
   • Connect a maintenance terminal and issue the shutdown this controller CLI command.
2. Controller Removal from Subsystem:
   • Power off the subsystem and disconnect power cords.
   • Remove the subsystem door, then the left side cover.
   • Remove the angle bracket.
   • Disconnect all cables from the controller, noting their placement for reconnection.
   • Press to free the controller housing from the front bezel, then remove the controller from its housing.
3. Controller Cover Removal:
   • Remove various screws (flat-head, pan) from the controller cover.
   • Slide the cover forward carefully to avoid damaging LEDs and buttons.
4. Cache Battery Replacement:
   • Crucially, use an ESD wrist strap before proceeding.
   • Disengage the battery-cable latching connector and slide the old cache battery out of its tray.
   • Slide the new battery into the tray and push its connector wire until it snaps into position.
5. Reassembly:
   • Reverse all removal instructions: replace the controller cover, reattach all cables, and return the controller to the subsystem.
6. Battery Disposal:
   • Return the old battery to a Digital Equipment Corporation Service Center, or recycle it at a local hazardous material disposal location according to regulations.