Troubleshooting The 2400 W Ac-Input Power Shelf - Cisco Universal Broadband Router uBR10012 Hardware Installation Manual

Troubleshooting the Power Subsystem

Troubleshooting the 2400 W AC-Input Power Shelf

Check the following to isolate a problem to the AC-input power shelf.
Check to see which version of the PEM you have in the chassis.
Step 1
a.
b.
c.
Step 2 Verify that the DC and AC OK LEDs are illuminated.
a.
b.
c.
Cisco uBR10012 Universal Broadband Router Hardware Installation Guide
4-12
If the Cisco uBR10012 router is running Cisco IOS Release 12.2(4)XF or a later release, you can
use the show environment command to monitor the AC-input power shelf.
Router# show environment
Temperature normal: chassis inlet measured at 29C/84F
Temperature normal: chassis core measured at 42C/107F
Fan:
Power Entry Module 0 type DC status:
Power Entry Module 1 type DC status:
Router#
If the DC PEM status is either "External AC Supply Fault" or "Input/Output Voltage Fault," a
problem exists with the AC-input power shelf.
The "External AC Supply Fault" message indicates that one of the power modules is reporting
–
either a fault, an over-temperature condition, or is missing. Check the LEDs on the front panels
of the power modules on the external power supply to discover which module has the fault.
If the "Input/Output Voltage Fault" message indicates that one of the power modules is not receiving
AC-input power then, check the LEDs on each power module, check that each power module is
plugged into an AC-input power outlet, and that those outlets are providing power.
If yes, then the power shelf is operational.
If not, do the following:
Make sure that the AC power cord is correctly plugged in to both the AC-output wall outlet and
–
in to the back of the AC-input power shelf. (A separate power cord is used for each power
supply.)
– Make sure that the AC power supply is properly inserted, seated, and locked. If necessary,
remove the AC power supply and reinsert it.
Check the external AC power source.
–
– Swap the AC power supply with one of the others. If the failure follows the power supply,
replace the power supply. If the failure remains in that particular power bay, double-check the
external AC power source and the power cord connections; if they are correct, contact the
Cisco TAC for additional troubleshooting information.
If only DC OK LED is not illuminated, then check the wiring to the Cisco uBR10012 router
DC-input terminal blocks.
Chapter 4 Troubleshooting the Installation
OK
OK
OK
OL-18259-09