APC 15000 RAID User Manual

118 

007-5510-002

Check that there is a valid SAS signal present at the I/O connector.  If there is no signal present, ensure 
the cable has  been properly inserted.

Check the  I/O module setup as follows:

– Ensure the  I/O module has been correctly installed and all external links and cables are securely 

fitted.

– Ensure the maximum cable length has not been exceeded.

Green LEDs are always used for good or positive indication. Amber LEDs indicate there is a critical 
fault present within the module. See specific LED tables for further information.

When a HDD  is faulted, 

 describes the fault LED behavior.

• Under Normal conditions, the LEDs should all be illuminated constant GREEN.
• If a problem is detected, the color of the relevant LED will change to AMBER.

The PCM LEDs are shown in 

.

• Under Normal conditions, the LEDs should all be illuminated constant GREEN
• If a problem is detected, the color of the relevant LED will change to AMBER.

The DEM fault  LEDs are explained in 

.

HDD LEDs

PCM LEDs