Fan Cooling Module - 5U Enclosures - Lenovo ThinkSystem DS Series Hardware Installation And Maintenance Manual

Fan cooling module – 5U enclosures
The five fan cooling modules (FCMs) at the rear of the enclosure maintain all system components below their
maximum temperature, assuming the ambient temperature is below 35ºC. Fan speed within the FCMs is governed
by the controller modules.
FCMs are hot-swappable. Replacement of an FCM can be performed while the enclosure is running, but the
procedure must be completed within two minutes of the removal of the defective module. Verify that you have a
replacement module on hand before removing the defective FCM.
Fan Cooling Module LED descriptions (see inset illustration detail above)
Module OK LED (Green)
LED behavior
•
If any of the FCM LEDs are illuminated amber, a module fault condition or failure has occurred.
• For a detailed description of FCM LED behavior, see
Figure 35 LEDs: FCM – 5U enclosure rear panel
NOTE: The
42 System overview
FCM LEDs Inset
Module OK
Fan Fail
"System airflow" (page 40)
Fan Fail LED (Amber/blinking amber)
"Fan cooling module LEDs" (page
topic introduced for the 2U enclosures applies equally to 5U enclosures.
FCM LEDs
(hidden)
100).