Overview Of Rear Panel Leds; Power Supply Unit - Seagate Exos E 4U106 Hardware Installation And Maintenance Manual

• LED 6 Fault - Rear Module
This LED illuminates amber when experiencing a system hardware fault with an FRU accessible through the
rear of the enclosure (IOMs, PSUs, System Fans). This LED is normally off. If no LED is illuminated in the
Rear Module then contact Seagate support.
• LED 7 Fault - Controller Bay
This LED illuminates amber when experiencing a system hardware fault initiated by GEM, for an FRU that is
accessible through the controller bay cover. This LED is normally off. Pull the chassis forward from its
installed position within the rack, remove the controller bay cover and look for amber colored LED on disc
drives or controller fans. Replace the faulty component. If no LED is illuminated in the Main Bay then contact
Seagate support.

Overview of rear panel LEDs

Power supply unit

AC-DC power is provided by up to two auto-ranging power supply modules (PSUs). Cooling is provided by four
separate cooling fans and two controller module fans. The IOM provides power and LED control. Also see
"System airflow" (page 28)
26 System overview
for optimal cooling within the enclosure(s).