IBM 265, Service Manual

Page: 307 / 365

Attention: To ensure proper system cooling, do not remove the service access
cover for more than 30 minutes during this procedure.
2. Determine which of the following fan assemblies to replace by checking the fan
LEDs on the diagnostic LED panel (see “Attention LED and Lightpath LEDs” on
page 24) and the LEDs located on the fan assemblies.
v
Fan assembly 1 (1)
v
Fan assembly 2 (4)
v
Fan assembly 3 (9)
v
Fan assembly 4 (12)
3. If you are removing fan assembly 2, you must remove the processor and memory
card cover. See “Processor and Memory Card Cover” on page 254.
4. If you are removing fan assembly 1 or fan assembly 2, pull out the snap button and
remove the fan.
If you are removing fan assembly 3 or fan assembly 4, press the orange release
latch (9), or (12) for the fan and pull the fan away from the system.
Replacement
Note: If a fan assembly is being replaced for a redundant failure, after the service
repair action is completed, ask the customer to check the crontab file for any
power/cooling warning messages. When a power or cooling error is encountered,
AIX adds an entry to the crontab file to
″
wall
″
a warning message every 12
hours, alerting/reminding the customer of the problem. Replacing the faulty part
does not clear this crontab entry, so unless the crontab file is edited to remove
this entry, the customer will continue to be reminded of the failure despite it’s
having been repaired. The AIX command crontab -l reads the crontab file to
determine if an entry exists. The crontab -e command edits the file.
1. Slide the replacement fan assembly into the system until it clicks into place.
2. Replace the service access cover. See “Service Access Cover” on page 251.
Chapter 9. Removal and Replacement Procedures
291