User`s guide

9-25
Cooling Fan Unit
Two cooling fan units (front and rear) are factory-installed in your server. By installing an optional redundant fan unit
(containing three fans), your server can contain up to five cooling fans for cooling the CPU, memory, and PCI devices.
With optional redundant cooling fan unit, the server can continue operation even if one of the fan units is defective.
IMPORTANT:
 Be sure to ask your service representative for replacement of a cooling fan unit if any of
them is faulty.
 A redundant fan unit cannot be installed together with awater-cooling heat sink.
Optional Fan Unit
Optional fan unit is composed of three fan units. The shape of Option A (for front or rear fan) differs from that of
Option B (for HDD cage). See the figure below.
Front fan (factory-installed) Front fan (Option A)
PCI/HDD cage fan (Option B)
Rear fan
(factory-installed)
Rear fan
(Option A)
Catch
HDD cage fan (Option B)
Front or rear fan (Option A)
Groove