IBM FAStT500 User Guide - Page 39

Table 3: Indicator lights back, Power supply

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Table 3: Indicator lights (back) Indicator light Color Normal operation Problem indicator Possible conditions indicated by the problem indicator1 Fan and communications module Fan and Amber Off communication fault On • Fan and communications module has failed or is installed incorrectly • Overtemperature condition Power supply Power supply Green On Off • No power to controller unit • No power to storage subsystem • Power supply has failed • Overtemperature condition 1 Always use the storage-management software to identify the failure. The mini-hub indicator lights on the back of the controller unit are shown in Figure 11 and described in Table 4 on page 20. OUT IN Fault Bypass (upper port) Loop good Bypass (lower port) Mini-hub indicator lights Figure 11. Mini-hub indicator lights Chapter 2. Operating the controller unit 19

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Chapter 2. Operating the controller unit
19
The mini-hub indicator lights on the back of the controller unit are shown in
Figure 11
and
described in
Table 4 on page 20
.
Figure 11.
Mini-hub indicator lights
Table 3: Indicator lights (back)
Indicator light
Color
Normal
operation
Problem
indicator
Possible conditions indicated
by the
problem indicator
1
Fan and communications module
Fan and
communication
fault
Amber
Off
On
•
Fan and communications module has failed
or is installed incorrectly
•
Overtemperature condition
Power supply
Power supply
Green
On
Off
•
No power to controller unit
•
No power to storage subsystem
•
Power supply has failed
•
Overtemperature condition
1
Always use the storage-management software to identify the failure.
OUT
IN
Mini-hub indicator
lights
Fault
Bypass
(upper port)
Loop good
Bypass
(lower port)