Hitachi GR4000 Series Installation Manual page 201

(2) Attachment of a basic control unit
Step 1
insert it into the slot.
Slot for a basic control unit
Lever
Figure 5.5-4 Basic control unit being inserted
!
520-10-014-20X
Open the levers of the basic control unit as shown in the figure below, and
Caution: When installing a basic control unit into the device, open its levers as shown
in the figure above. If you try to install it with its levers shut or open too wide, its
levers might be damaged when being inserted into the slot.
GR4000 Installation Guide Version 1.00 - Preliminary
Basic control unit
183