IBM DS4700 manual Front LEDs, DC power supply and fan unit LEDs

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ds470086

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Figure 97. DC power supply and fan unit LEDs

Table 41. DC power supply and fan unit LEDs

Number	LED	Normal Status	Problem Status
11	DC power supply and fan	On	Off
	unit power
2	Service Action Allowed	Off	On2
	(OK to Remove)
3	Service Action Required	Off	On2
	(Fault)
41	Direct Current Enabled	On	Off

Notes:

1.Although the symbols for dc power supply and fan unit power and Direct Current Enabled LEDs are the same, the LEDs serve different purposes. The dc power supply and fan unit power LED indicates that dc inputs to the dc power supply and fan unit are present and good. The Direct Current Enabled LED indicates that the dc output from the dc power supply and fan unit to the internal circuitry is good.

2.Verify that any attached disconnect device is set to On and the power switch is in the On position when these LEDs are lit. If the disconnect device switch is at the On position, flip it to the Off position, wait at least 15 seconds and flip it again to the On position. If these LEDs did not change to an unlit state in 30 seconds, replace the dc power supply and fan unit CRU.

Front LEDs

This section describes the primary LEDs and controls on the front of the storage subsystem for all models.

Chapter 4. Operating the storage subsystem 127