Dell PowerVault ME4 Series Storage System Deployment Guide

2U enclosure LEDs

Use the LEDs on the 2U enclosure to help troubleshoot initial start-up problems.

Under normal conditions, the PCM OK LEDs are a constant green.

Table 1. PCM LED states
PCM OK (Green)	Fan Fail (Amber)	AC Fail (Amber)	DC Fail(Amber)	Status
Off	Off	Off	Off	No AC power on any PCM
Off	Off	On	On	No AC power on this PCM only
On	Off	Off	Off	AC present; PCM working correctly
On	Off	Off	On	PCM fan speed is outside acceptable limits
Off	On	Off	Off	PCM fan has failed
Off	On	On	On	PCM fault (over temperature, over voltage, over current)
Off	Blinking	Blinking	Blinking	PCM firmware download is in progress

The Ops panel displays the aggregated status of all the modules. See also 2U enclosure Ops panel.

Table 2. Ops panel LED states
System Power (Green/Amber)	Module Fault (Amber)	Identity (Blue)	LED display	Associated LEDs/Alarms	Status
On	Off	Off	X	-	5 V standby power present, overall power has failed or switched off
On	On	On	On	-	Ops panel power on (5 s) test state
On	Off	Off	X	-	Power on, all functions good
On	On	X	X	PCM fault LEDs, fan fault LEDs	Any PCM fault, fan fault, over or under temperature
On	On	X	X	SBB module LEDs	Any SBB module fault
On	On	X	X	No module LEDs	Enclosure logical fault
On	Blink	X	X	Module status LED on SBB module	Unknown (invalid or mixed) SBB module type is installed, I²C bus failure (inter-SBB communications). EBOD VPD configuration error
On	Blink	X	X	PCM fault LEDs, fan fault LEDs	Unknown (invalid or mixed) PCM type is installed or I²C bus failure (PCM communications)
		X	Blink	-	Enclosure identification or invalid ID selected

X= Disregard

Actions:

If the Ops panel Module Fault LED is on, check the module LEDs on the enclosure rear panel to narrow the fault to a CRU, a connection, or both.
Check the event log for specific information regarding the fault, and follow any Recommended Actions.
If installing a controller module or IOM CRU:
- Remove and reinstall the controller module or IOM per the Dell PowerVault ME4 Series Storage System Owner’s Manual.
- Check the event log for errors.
If the CRU Fault LED is on, a fault condition is detected.
- Restart this controller from the partner controller using the PowerVault Manager or CLI.
- If the restart does not resolve the fault, remove the controller module or IOM and reinsert it.
If the previous actions do not resolve the fault, contact Dell for assistance.

A green LED and amber LED mounted on the front of each drive carrier module display the disk drive status.

In normal operation, the green LED is on and flickers as the drive operates.
In normal operation, the amber LED is:
- Off if there is no drive present.
- Off as the drive operates.
- On if there is a drive fault.