User`s guide

StorageWorks Replacement Procedures

3.2 Replacing a Blower

Note

These procedures do not apply to the BA350–LA SBB shelf.

Each StorageWorks shelf has blowers mounted on the rear. Connectors on the

backplane provide the +12 Vdc of power to operate the blowers. When either

blower fails, the shelf status (upper) LED on the power SBB is off and an error

message is passed to the controller or host.

WARNING

Service procedures described in this manual that involve blower removal

or access to the rear of the shelf must be performed only by qualiﬁed

service personnel.

To reduce the risk of electrical energy hazard, disconnect the power cables

from the shelf power SBBs before removing shelf blower assemblies or

performing service in the backplane area, such as modifying the SCSI

bus.

Use the following procedure to replace a blower (see Figure 3–2).

1. If you cannot access the rear of the shelf, remove the shelf as described in

Section 3.3.1.

2. Disconnect the power cables to the shelf power SBBs.

3. Use a Phillips screwdriver to remove the safety screw in the upper right

corner or lower left corner of the blower.

4. Press the upper and lower blower mounting tabs together to release the

blower.

5. Pull the blower straight out to disconnect it from the shelf power connector.

6. Align the replacement blower connector and push the blower straight in,

making sure that both mounting tabs lock in place.

7. Replace the safety screw.

8. Replace the shelf as described in Section 3.3.2.

9. Connect the shelf power cables and verify that the shelf and all SBBs are

operating properly by observing the LEDs.

Note

If the upper power supply LED (shelf status) does not come on and all the

shelf power supplies are operating, the second blower may have failed or

the wrong blower was replaced.

3–4 StorageWorks Replacement Procedures