Technical data

Determining the need to replace a fan
Use one of the following methods to determine the status of the fans:
• Check the fan status LED (refer to LEDs on the nonport side of the switch on page 34).
• In Web Tools, click the Fan Status icon.
• Enter the fanShow command at the prompt to display fan status. The output of this command shows
the status of five fans. Fans 1, 2, and 3 are the FRU fans.
NOTE
Fans 4 and 5 are the integral fans of the power supplies. These two fans normally operate at around
12000 RPM while the system fans typically operate around 4000 RPM. Refer to Power supply removal
and replacement on page 42 if there are any issues with those two fans.
sb_70:admin> fanshow
Fan 1 is Ok, speed is 4013 RPM
Fan 2 is Ok, speed is 3961 RPM
Fan 3 is Ok, speed is 3961 RPM
Fan 4 is Ok, speed is 12001 RPM
Fan 5 is Ok, speed is 11969 RPM
Time and items required
Replacing a fan in the Brocade 7840 should require less than two minutes to complete.
You need the following items to replace a fan in the Brocade 7840:
• A new fan that has the same part number and airflow indicator as the fan being replaced.
• A #1 Phillips screwdriver
Replacing a Brocade 7840 fan
Complete the following steps to replace a fan in a Brocade 7840.
1. Using the Phillips screwdriver, unscrew the captive screw on the fan.
DANGER
Be careful not to accidently insert your fingers into the fan tray while removing it from the
chassis. The fan may still be spinning at a high speed.
2. Remove the fan from the chassis by using the handle on the fan to pull it straight out and away from
the chassis.
3. Install the new fan in the chassis:
a) Check to see that the airflow direction is the same as the fan you are replacing.
b) Orient the new fan with the captive screw on the right, as shown below.
NOTE
Do not force the installation. If the fan does not slide in easily, ensure that it is correctly
oriented before continuing.
Determining the need to replace a fan
Brocade 7840 Extension Switch Hardware Reference Manual 45
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