Hitachi AMS 2100, Service Manual

Page: 75 / 192

Introduction
1–35
Hitachi AMS 2000 Family Storage System Service Guide
Power supply status LEDs
Each expansion unit power supply has two LEDs on the panel near the
power receptacle. These LEDs indicate the operational status of the power
supply, as shown in the following figure and table.
Figure 1-32: Expansion Unit Rear Panel
2 (fast) hard error (CUDG error)
3 (fast) Firmware error in flash memory
ON
Boot section error in the ENC firmware, a RAM error, or ENC hard
configuration error
1.When blinking fast, the LED is on for 400 ms and off for 200 ms for each fast
blink. After the number of fast blinks has completed, the LED ID goes off for one
second.
Table 1-24: Expansion Unit Rear Panel Component Descriptions
Item Description
1
Lock Lever (2 places)
2
Alarm LED (red). This LED indicates that the power supply has failed. Although
the other power supply can supply sufficient power and cooling for the array,
Hitachi Data Systems recommends that you replace the failed power supply as
soon as possible. See the Hitachi AMS 2100/2300 Service Guide for instructions.
3
Ready LED (green). on each power supply blinks when the corresponding power
receptacle is connected to a working AC outlet, even if an AMS 2100/2300 array
is not turned on;
otherwise, the LED is OFF.
Table 1-23: LOC LED
Number
of blinks
Description