IBM Type 8730, Type 8720 manual Dc Out

Table 3. Power module LEDs (continued)

		! (Error)
DC IN or AC IN	DC OUT	(amber)	Description and action
Off	Off	Off or On*	There is an input power problem.
			Possible causes:
			v There is no power to the power module.
			Actions: Make sure that:
			1. The power is correctly connected to the
			unit.
			2. The power is connected to 220 v ac
			(8730) or –48 v dc (8720).
			3. The power source functions properly.
			v The power module has failed.
			Action: Replace the power module.
			If the problem remains, have the unit serviced.
			*Error LED will operate only if a redundant
			power supply is installed.
On	On	On	There is a fault condition in the power supply.
			Possible causes:
			v Thermal fault.
			Action: Replace the power module.
			v 12 v over-voltage power condition or 12 v
			under-voltage power condition.
			Actions: Determine the cause of shutdown
			using diagnostics and replace the failed
			component. When the fault has ben
			cleared, reset the power module.
			– Issue a power-module reset through the
			management module.
			– Remove the power module from the unit
			for at least 10 seconds.

14BladeCenter T Type 8720 and 8730: Hardware Maintenance Manual and Troubleshooting Guide