5U84 Enclosure Leds - Dell EMC ME4084 Owner's Manual

Activity LED (Green)
*If multiple conditions occur simultaneously, the LED state behaves as indicated by the condition listed earliest in the table, as rows are
read from top to bottom.
Controller module and IOM LEDs
Controller module and IOM LEDs pertain to controller modules and expansion modules, respectively.
• For information about controller module LEDs, see
• For information about IOM LEDs, see
Expansion enclosure IOM LEDs
Expansion enclosure IOM status is monitored by the LEDs located on the face plate. See
LED behaviors for expansion enclosure IOMs are described in the following table. For actions pertaining to
Table 14. Expansion enclosure IOM LED
Table 14. Expansion enclosure IOM LED states
CRU OK CRU Fault
(Green) (Amber)
On Off
Off On
Blinking

5U84 enclosure LEDs

When the 5U84 enclosure is powered on, all LEDs turn on for a short period to ensure that they are working.
NOTE: This behavior does not indicate a fault unless LEDs remain lit after several seconds.
PSU LEDs
See Power supply module for a visual description of the Power Supply Unit (PSU) module faceplate.
Table 15. PSU LED states
CRU Fail AC Missing
(Amber) (Amber)
On Off
On On
Off Off
Off Off
Blinking Blinking
Off On
On On
On --
Fault LED (Amber)
12 Gb/s controller module
Expansion enclosure IOM
states, see Fault isolation
External host port
activity (Green)
Off
On
Blinking
Power Status
(Green)
Off No AC power to either PSU
Off PSU present, but not supplying power or PSU alert state. (usually due to critical
temperature)
On Mains AC present, switch on. This PSU is providing power.
Blinking AC power present, PSU in standby (other PSU is providing power).
Off PSU firmware download in progress
Off AC power missing, PSU in standby (other PSU is providing power).
On Firmware has lost communication with the PSU module.
Off PSU has failed. Follow the procedure in
LEDs.
LEDs.
Figure 17. IOM detail –
methodology.
Status
IOM OK
IOM fault – see Replacing a Controller Module or IOM
No external host port connection
HD mini-SAS port connection – no activity
HD mini-SAS port connection – activity
EBOD VPD error
Replacing a power supply unit
Troubleshooting and problem solving
Status/condition*
ME412/ME424/ME484.
Cache status LED details
(PSU).
or
33