![background image](http://html.mh-extra.com/html/lenovo/thinkagile-hx1521-r/thinkagile-hx1521-r_user-manual_202680028.webp)
Figure 11. Server components
The parts listed in the following table are identified as one of the following:
•
Tier 1 customer replaceable unit (CRU):
Replacement of Tier 1 CRUs is your responsibility. If Lenovo
installs a Tier 1 CRU at your request with no service agreement, you will be charged for the installation.
•
Tier 2 customer replaceable unit:
You may install a Tier 2 CRU yourself or request Lenovo to install it, at
no additional charge, under the type of warranty service that is designated for your server.
•
Field replaceable unit (FRU):
FRUs must be installed only by trained service technicians.
•
Consumable and Structural parts:
Purchase and replacement of consumable and structural parts is
your responsibility. If Lenovo acquires or installs a structural component at your request, you will be
charged for the service.
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