NEC IP8800/S6300 Isolating Failures on External Power Unit, Isolating Failures on Power Module

2. Troubleshooting System Failures

2.2.2Isolating Failures on External Power Unit

If the external power unit fails, follow the steps below to isolate the failure.

Table 2-5: Isolating Failures on External Power Unit

No.	Failure		Action
1	POWER LED on the external power unit is lit in	Check LED on the power module mounted on the external power unit
	green	and identify the power module that is not normally running. If the power
		module is normally running, the states below are provided.
		•	EPU-A:
			DC-OK: Lit in green, DC-ALM: OFF
		•	EPU-B:
			DC-OK: Lit in green, DC-FAIL: OFF, AC-OK: Lit in green
		For the power module that is not normally running, implement "Table
		2-7: Isolating Failures on Power Module."
2	POWER LED on the external power unit is OFF	Follow the steps in "Table 2-6: Isolating Failures on External Power
		Unit (Main Body)."

Table 2-6: Isolating Failures on External Power Unit (Main Body)

No.	Failure		Action
1	Power switch on the external power unit is OFF	Turn on the power switch.
2	Power cable of the external power unit is not	1.	Turn off the power switch.
	correctly connected to the system	2.	Connect the power cable correctly.
		3.	Turn on the power switch.
3	Input power to the external power unit is out of the	Ask the system administrator to take the action because of the failure on
	range below	the power supply facility (i.e. not the failure on this system).
	(AC power supply: 90 to 132V)
4	Other than 1 to 3 above	Replace the external power unit.

Table 2-7: Isolating Failures on Power Module

No.	Failure		Action
1	Power switch on the power module is OFF	Turn on the power switch on the power module.
2	Power cable of the power module is not correctly	1.	Turn off the power switch on the power module.
	connected to the system	2.	Connect the power cable correctly.
		3.	Turn on the power switch on the power module.
3	Power module is not correctly mounted on the	1.	Turn off the power switch.
	external power unit	2.	Mount the power module correctly.
		3.	Turn on the power switch.
4	Other than 1 to 3 above	Replace the power module.

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