Cisco Systems OL-11497-03 manual Maintaining the Router Removing and Replacing a DC PEM

Chapter 6 Maintaining the Router

Removing and Replacing a DC PEM

Step 3 Check the power supply status indicators:

•Output OK (green)—Indicates that the PEM is operating normally, and the source DC output voltage is within the nominal operating range of –48 to –60 VDC. This indicator should light when the power switch is set to the On

(1) position.

If the indicator is off, toggle the power switch off and then on. If the indicator remains off after several attempts to power it on, replace the power supply with a spare.

•Input OK (green)—Indicates that the power supply is operating normally, and the source DC input voltage is within the nominal operating range of -40.5VDC to -75VDC. This indicator should light when the power supply switch is set to the On (1) position.

–If the Input OK indicator remains off after checking all of the power sources, replace the power supply with a spare.

–If the spare power supply does not work, replace the PDU.

•Miswire (amber)—Indicates the input wiring is incorrect at the PDU power connection block.

Correct wiring to the DC power connector block (see Figure 6-25).

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