Fujitsu PRIMERGY TX1310 M1 Upgrade And Maintenance Manual page 101

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In the latest chassis version the system fan 2 comes without a fan guard.
A corresponding warning label is added. (1). The pictures doesn't always
show the current version.
Figure 47: Fan without guard
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Additional fans in power supply units cannot be replaced individually.
TX1310 M1
Upgrade and Maintenance Manual
System fans
101