Hitachi GR4000 Series Installation Manual page 43

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(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 1.1-6. 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: GR4000-320E (DC) 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
GR4000 Installation Guide Version 1.00 - Preliminary
POW0-0 POW1-0
○ ×
○ ○
POW0-1 POW1-1
○ ×
○ ○
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