PSU LEDs
The following table describes the LED states for the PSU:
Table 13. PSU LED states
CRU Fail (Amber) AC Missing
(Amber)
Power (Green) Status
On Off Off No AC power to either PSU
On On Off PSU present, but not supplying power or PSU alert state. (typically
due to critical temperature)
Off Off On Mains AC present, switch on. This PSU is providing power.
Off Off Blinking AC power present, PSU in standby (other PSU is providing power).
Blinking Blinking Off PSU firmware download in progress
Off On Off AC power missing, PSU in standby (other PSU is providing power).
On On On Firmware has lost communication with the PSU module.
On -- Off PSU has failed. Follow the procedure in “Replacing a PSU” in the
Dell EMC PowerVault ME4 Series Storage System Owner’s
Manual.
Fan cooling module LEDs
The following table describes the LEDs on the Fan Cooling Module (FCM) faceplate:
Table 14. FCM LED descriptions
LED Status/description
Module OK Constant green indicates that the FCM is working correctly. Off indicates that the fan module has
failed. Follow the procedure in “Replacing an FCM” in the Dell EMC PowerVault ME4 Series Storage
System Owner’s Manual.
Fan Fault Amber indicates that the fan module has failed. Follow the procedure in “Replacing an FCM” in the
Dell EMC PowerVault ME4 Series Storage System Owner’s Manual.
Ops panel LEDs
The Ops panel displays the aggregated status of all the modules.
Table 15. Ops panel LED descriptions
LED Status/description
Unit ID display Usually shows the ID number for the enclosure, but can be used for other purposes, for example,
blinking to locate enclosure.
Power On/Standby Amber if the system is in standby. Green if the system has full power.
Module Fault Amber indicates a fault in a controller module, IOM, PSU, or FCM. Check the drawer LEDs for
indication of a disk fault. See also Drawer Fault LEDs (amber).
Logical status Amber indicates a fault from something other than firmware (usually a disk, an HBA, or an internal or
external RAID controller). Check the drawer LEDs for indication of a disk fault. See also Drawer LEDs.
Drawer 0 Fault Amber indicates a disk, cable, or sideplane fault in drawer 0. Open the drawer and check DDICs for
faults.
Drawer 1 Fault Amber indicates a disk, cable, or sideplane fault in drawer 1. Open the drawer and check DDICs for
faults.
Drawer LEDs
The following table describes the LEDs on the drawers:
Troubleshooting and problem solving
65
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