Installation guide

Because the cooling system relies on pressurized air, do not leave any of the fan assembly slots
empty longer than two minutes while the switch is operating. If a fan assembly fails, leave it in the
switch until it can be replaced. Maintain all fan assemblies in operational condition to provide
redundancy.
CAUTION
If you do not install a module or a power supply in a slot, you must keep the slot filler panel in
place. If you run the chassis with an uncovered slot, the system will overheat.
The following table describes the power supply/fan assembly status LED colors, behaviors, and
actions required, if any.
LED behavior, description, and required actionsTABLE 7
LED color and behavior Description Action required
No light Power supply and fan assembly is
not receiving power.
Verify that the power supply and fan
assembly FRU is seated correctly.
Steady green Power supply and fan assembly is
operating normally.
No action required.
Flashing green (for more than five
seconds)
A power supply and fan assembly
fault has occurred for one of the
following reasons:
• The power supply or fan in the
assembly has failed.
• The FRU was disabled by a user.
• The FRU power switch has been
turned off or the unit has been
unplugged.
Take one of the following actions:
• Replace the FRU.
• Verify that the power supply/fan
assembly FRU is enabled.
• Check the power switch and
plug.
Time required
Replacing a fan assembly in the switch should take less than two minutes.
Items required
You need the following items to replace a power supply and fan assembly.
• New power supply and fan assembly FRU.
• Phillips-head screwdriver #1.
Replacing the power supply/fan assembly
Complete the following steps to replace a power supply and fan assembly.
1. Unscrew the captive screw on the power supply/fan assembly you are replacing using a Phillips-
head screwdriver.
2. Remove the power supply/fan assembly from the chassis by pulling the handle out, away from the
chassis.
3. Confirm that the new power supply/fan assembly has the same part number as the removed one.
Time required
42 Brocade 7800 Extension Switch Hardware Installation Guide
53-1001350-08