HP A7990A - StorageWorks SAN Director 4/16 Blade Switch, Hardware Reference Manual

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80 Installing Field-replaceable units (FRUs)
Blower assembly
IMPORTANT: To ensure continuous adequate cooling, maintain three operating blower assemblies at all
times except for the brief period when replacing a blower assembly.
The procedure for each blower assembly takes less than 5 minutes. The following items are required for the
blower assembly replacement:
• Replacement blower assembly
• Phillips #2 screwdriver
Removing a blower assembly
To remove a blower assembly:
CAUTION:
Wear a grounded ESD strap when handling DC Director components. The Director chassis provides a
grounding connection above the power connectors. Also,
store ESD-sensitive components in antistatic
packaging.
1. Before removing a blower assembly, verify that the other blower assemblies are functioning correctly.
The power LEDs should be steady green.
2. Use the screwdriver to loosen the captive screws at the top and bottom of blower assembly.
3. Support the blower assembly from underneath. Use the handle to remove the blower assembly (see
Figure 33 ).
Replacing a blower assembly
To replace a blower assembly
1. Orient the blower assembly and slide it into the chassis, pushing firmly to ensure that it is seated.
2. Verify that the power LED displays a green light.
3. Use the screwdriver or your fingers to tighten the captive screws.