Hitachi GR4000 Series Installation Manual page 29

*
(3) LED (Light Emitting Diode) and Switches
The LED of a chassis indicates the action status of a fan unit, BCU and PRU.
The LED is attached to the fan unit, and the status indicated by the LED differs
depending on the type of a device or the position where the fan unit is installed.
As for the status indicated by the each LED of a chassis, see Table 1.1-3. Refer to the
section "1.3 Power Supply Unit," "1.4 Basic Control Module (BUC)" or "1.6 Network
Interface Module (NIF)" for the LED and switches of other component units.
520-10-014-20X
NOTE: GR4000-160E1 requires 2 power supply units in a configuration using single
power source and 4 power supply units in a configuration using redundant power
source. The installation positions for power supply units in both cases are shown
below.
Power supply unit
Single power source
Redundant power source
○：should be installed ×：should not be installed
GR4000 Installation Guide Version 1.00 - Preliminary
POW0 POW1 POW2
○ ○ ×
○ ○ ○
11