Hitachi GR2000 - Manual (Page 401)

To add or remove the fans to/from each model of GR2000 other than GR2000-2S
refer to the following subsections.
8.3.1 Fan Tray for GR2000-10H
To add or remove the fan tray for GR2000-10H, follow the instructions illustrated
Figure 8-13.
*
Note: The fans of GR2000-2S cannot be added or removed by the user because they are
integral to chassis. When addition or removal of such a fan is necessitated on
GR2000-2S, entrust work to trained service personnel.
*
Note: For models other than GR2000-2S, certain fans cannot be added or removed by
the user. For fans not described in this section, entrust work to trained service
personnel.