Cisco XR 12410 - Manual (Page 140)

Chapter 4 Troubleshooting the Installation
Troubleshooting the Power Subsystem
4-10
Cisco XR 12410 and Cisco XR 12810 Router Installation Guide
OL-17441-01
Troubleshooting a DC PEM
Use the following procedure to troubleshoot a 2800 W DC PEM if it is not
operating properly.
Step 1 Make sure the PEM is seated properly:
• Eject and reseat the PEM. Make sure:
– The captive screw on the ejector lever is tightened securely.
– The power switch is set to the on (1) position.
Step 2 Check the PEM status indicators:
• F1LO (feeder 1 low) (flashing yellow)—Indicates that input connections to
the PDU (feeder 1) are loose or not connected, or the input voltage is below
the minimum. This indicator remains off during normal operation. Make sure
that:
– Power cords are securely attached to their PDU terminal studs.
– Power cords are securely attached at the DC source end.
– The source DC circuit breaker is switched on.
– Measure the voltage across the terminals to verify the source DC voltage
is within nominal operating range.
If the indicator is still flashing after you perform the above checks, replace
the power supply.
• F2LO (feeder2 low) (flashing yellow)—Indicates that input connections to
the PDU (feeder 2) are loose or not connected, or the input voltage is below
the minimum. This indicator remains off during normal operation. Make sure
that:
– Power cords are securely attached to their PDU terminal studs.
– Power cords are securely attached at the DC source end.
– The source DC circuit breaker is switched on.
– Measure the voltage across the terminals to verify the source DC voltage
is within nominal operating range.
If the indicator is still flashing after you perform the above checks, replace
the power supply.