Cisco XR 12406 - Manual (Page 137)

4-7
Cisco XR 12406 Router Installation Guide
OL-13831-01
Chapter 4 Troubleshooting the Installation
Troubleshooting an AC Power Subsystem
Table 4-1 summarizes the function of these indicators.
The following conditions must exist for an AC PEM to operate normally:
• The PEM is fully seated in its bay and the ejector levers are secured.
• AC-input power is within the required range is correctly connected to PEMs.
• The power switch on the PEM is switched on.
• The green LEDs labeled AC and DC on the PEM are on.
Follow these steps to help isolate a problem with an AC PEM.
Step 1 If the AC LED is off, verify that the power supply is fully seated in its bay, the
ejector levers are flush with the power supply faceplate, and the captive screws
are secured.
• If the AC LED goes on, go to Step 6 .
• If the AC LED remains off, go to Step 2
Table 4-1 AC-Input Power Supply LED indicators
LED Label Function State Description
AC
(Left LED)
Input
power On AC power source is present and is
within specified limits.
Off Power source is not within
specified limits.
DC
(Right LED)
Output
Power On Power supply is operating normally
in a power-on condition.
Off Power supply is operating in a fault
condition and shutdown has
occurred.