IBM BladeCenter S Problem Determination And Service Manual page 66

3. Check the fan module to see if the fault LED is lit. If the fault LED is lit,
4. Reseat the fan module.
5. From the advanced management module Web interface, go to the System Status
6. Swap the fan module with another working fan module.
7. Replace the fan module.
Fan module is stopped
If a fan module is stopped, check to see if the fault LED is lit on any of the fan
modules.
Problem
One of the fan modules in the BladeCenter S chassis is stopped.
Investigation
Perform these steps to resolve the problem:
1. Check the fan modules to see if the fault LED is lit. If the fault LED is lit,
2. From the advanced management module Web interface, go to the System Status
3. Reseat the fan module.
4. Swap the fan module with another working fan module.
Fan modules continually cycle to full speed
If fan modules continually cycle between normal speed and full speed, disconnect
all power from the BladeCenter S chassis, wait a few minutes, and reconnect the
power modules.
Problem
When you remove a device such as the media tray or a power module from the
BladeCenter S chassis, the fan modules will run at full speed. When you replace
the device, the fan modules will return to normal speed.
After replacing a device, the fan modules continually cycle between normal speed
and full speed for an extended period of time.
Investigation
Perform these steps to resolve the problem:
1. Disconnect power from all power modules in the BladeCenter S chassis.
52
BladeCenter S Type 7779/8886: Problem Determination and Service Guide
replace the fan module.
page and check the fan module speed.
a. If the problem fan module does not work, but the other fan module does
work, replace the fan module.
b. If the problem fan module now works, but the other fan module no longer
works, call IBM support.
replace the fan module.
page and check the status of the fan module. If the System Status page shows
that the fan module has failed, replace the fan module.
a. If the problem fan module does not work, but the other fan module does
work, replace the fan module.
b. If the problem fan module now works, but the other fan module no longer
works, call IBM support.