Disk Drive LEDs (5U Enclosures)
LEDs in each drive carrier module are shown in Figure 62 “Drive Fault LED” on page 61.
• In normal operation the amber LED state is:
– Off as the drive operates.
– On if there is a drive fault.
Power Cooling Modules (PCM)
Note: 2U Enclosures only.
AC-DC power is provided by up to 3 auto-ranging power cooling modules (PCMs) with integrated axial
cooling fans. The ESMs control the fan speed. Refer to “System Airflow” on page 22 about the system
airflow.
580W PCM
A 580W PCM voltage operating range is nominally 100V - 240V AC.
Figure 23. 580W Power Cooling Module
580W PCM LEDs
The PCM has these LEDs:
PCM OK Green
AC Input Fail
Amber
Fan Fail Amber
DC Output Fail
Amber
If all LEDs are amber, it indicates a communications failure.
Chapter 2. System Overview 21
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