HP DC SAN Backbone Director Switch Hardware Reference Guide (5697-2158, August 2012)

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.
Figure 39 Blower assembly
Replacing the WWN bezel (logo plate) and WWN card
The WWN cards contain fully redundant circuits and typically do not require replacement. Two
WWN cards are located beneath the WWN bezel (logo plate).
Allow approximately 20 minutes to replace a WWN card. The following items are needed to
replace a WWN card:
• ESD grounding strap
• #2 Phillips screwdriver (required only for some versions of the WWN card)
• If a serial console session is used: serial cable and a workstation computer with a terminal
emulator application (such as HyperTerminal for Windows systems or TIP for Solaris systems)
Determining whether or not to replace a WWN card
Before replacing a WWN card, verify that the replacement is necessary. Any of the following
events can indicate that the card requires replacement:
• Status LEDs on the WWN bezel not reflecting the actual status of the components
• Power or Status LEDs on WWN card (beneath logo plate) indicate a problem
• Problems viewing or modifying the data stored on the WWN card, see Table 16 (page 78)
• Error messages regarding WWN units #1 or #2, see Table 17 (page 78)
To determine the status of a WWN card:
Replacing the WWN bezel (logo plate) and WWN card 77