IBM StorageSmart DF1100J, Operator'S Manual

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A fan-and-power-supply assembly has the following lights and switch:
AC PWR light
«1¬
The AC PWR light, which is green, comes on when the mainline power
supply is connected to the fan-and-power-supply assembly.
DC PWR light
«2¬
The DC PWR light, which is green, comes on when this
fan-and-power-supply assembly is supplying power to the ProFibre
Storage Array unit.
CHK light
«3¬
The CHK light, which is amber, indicates a failure in the
fan-and-power-supply assembly.
Note: This light is always off when the DC On/Standby switch is set to
standby.
DC On/Standby switch
«4¬
The DC On/Standby switch connects dc electrical power from the
fan-and-power-supply assembly to the disk drives and other components
in the ProFibre Storage Array unit. This switch must be set to on for the
fan-and-power-supply unit to start.
If the DC On/Standby switch on either of the two fan-and-power-supply
assemblies is set to on, power in the ProFibre Storage Array unit is
switched on automatically if all of the following conditions exist:
v
Input power to the ProFibre Storage Array is present.
v
The fan-and-power-supply assembly is fully inserted into its slot.
Figure 5. Fan-and-Power-Supply Assembly Lights and Switch
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ProFibre Storage Array: Operator’s Guide