Troubleshooting A Dc Power Module - Cisco ASR 9000 Series Installation Manual

Troubleshooting a DC Power Module

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Troubleshooting a DC Power Module
Follow these steps to troubleshoot a DC power module if it is not operating properly.
Procedure
Step 1 Make sure the power module is seated properly by ejecting and reseating the power module. Check that:
• Latch on the door/ejector lever is locked securely.
• Power switch on the power tray is set to the ON (1) position.
Step 2
Make sure the router is powered on and that all power cords are connected properly. Check that the:
• Power cables are securely attached to their power module terminal studs.
• Power cables are securely attached at the DC source end.
• Source DC circuit breaker is switched on.
Step 3 Check the power supply status LED indicators:
• Input power LED (green)—Indicates that the DC power input is operating normally, and the source DC
• Output power LED (green)—Indicates that the DC power output is operating normally, and the –54 VDC
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input voltage is within the nominal operating range of –40 to –72 VDC.
• If the input power LED is blinking, input connections to the power module are loose or not connected,
or the input voltage is below the minimum. Verify that DC power from the source is operating in
the nominal range of –40 to –72 VDC.
On the DC power tray, the Power Input LED is lit solid green if both DC feeds are valid
Note
and blinks green if only a single DC feed is valid. Check the input connections to the
power module.
• If the indicator is still flashing after you perform the above checks, replace the power module.
output voltage to the backplane is within the nominal operating range. This indicator lights only when
the power switch at the rear of the power tray is set to the ON (1) position.
• If the output power LED remains off after checking all the power sources, replace the power module
with a spare. If the spare power module does not work, troubleshoot the power tray in which the
module is plugged.
Output power LED
Fault LED
Troubleshooting the Installation
ON when the power module output
voltage is present
BLINKING when the power
module is in a power limit or
overcurrent condition
ON to indicate that a power module
failure has occurred