Cisco Systems XR 12404 manual OL-13830-02

Chapter 4 Troubleshooting the Installation

Troubleshooting the DC Power Subsystem

The following conditions must exists for a DC PEM to operate normally:

•The PEM is fully seated in its bay and the ejector levers are secured.

•DC-input power is within the required range is correctly connected to the chassis PDU terminal connector block.

•The circuit breaker on the PEM is switched on.

•The green LEDs labeled OUTPUT OK and INPUT OK are on, and the amber LED labeled OUTPUT FAIL is off.

Follow these steps to help isolate a problem with a DC PEM:

Step 1 Is the OUTPUT FAIL LED on?

• If yes, the PEM is faulty. Replace the PEM.

• If no, go to Step 2.

Step 2 If the INPUT OK LED is off, verify that the PEM is fully seated in its bay, the ejector levers are flush with the PEM faceplate, and the captive screws are secured.

•If the INPUT OK LED comes on, go to Step 6.

•If the INPUT OK LED remains off, go to Step 3.

Step 3 Verify that the PEM circuit breaker switch is on.

•If yes, go to Step 4.

•If no, switch the circuit breaker on.

–If the INPUT OK LED remains off, go to Step 4.

–If the INPUT OK LED comes on, go to Step 6.

	Cisco XR 12404 Router Installation Guide
OL-13830-02		4-11