IBM TotalStorage DS300 Best Practices Manual page 66

Power supply problem Indicator
Amber Fault LED is lit solidly.
The amber Fault LED will be ON solid when the
enclosure services module detects a fault, such as
one or more of the following conditions:
DC output fault
AC input fault
Fan fault
Turned ON through SES control page
Note: The amber Fault LED flashes when the
power/cooling module locate feature is selected.
Fibre Channel RAID controller for DS400
Figure 3-14 shows the LEDs, controls and connectors for the DS400 Fibre
Channel RAID controller.
Figure 3-14 DS400 controller LEDs, controls and connections
Serial connectors (SP1 and SP2) - The serial connectors are for diagnostic
purposes only.
Management connector - The management connector is for ServeRAID
Manager function.
FC 1 connector - The FC 1 connector is for Fibre Channel data transfer.
FC 0 connector - The FC 0 connector is for Fibre Channel data transfer.
SCSI channel 4 - SCSI channel 4 can be connected to an IBM EXP400
Storage Expansion Unit.
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IBM TotalStorage DS300 and DS400 Best Practices Guide
Action
Replace the power supply.