Isolate The Cause Of Power Supply Problems - Cisco ONS 15454 Troubleshooting Manual

Chapter 1 General Troubleshooting
1.11.1 Power Supply Problems
Symptom
to the default date and time.
Table 1-45
Table 1-45 Power Supply Problems
Possible Problem
Loss of power or low
voltage.
Improperly connected
power supply.
Warning When working with live power, always use proper tools and eye protection.
Warning Always use the supplied electrostatic discharge (ESD) wristband when working with a powered
ONS 15454. Plug the wristband cable into the ESD jack located on the lower-right outside edge of the
shelf assembly.
Caution Operations that interrupt power supply or short the power connections to the ONS 15454 are
service-affecting.

Isolate the Cause of Power Supply Problems

Step 1 If a single ONS 15454 show signs of fluctuating power or power loss:
a.
b.
c.
d.
e.
November 2004
Loss of power or low voltage, resulting in a loss of traffic and causing the LCD clock to reset
describes the possible problems and the solution.
Solution
The ONS 15454 requires a constant source of DC power to properly
function. Input power is –48 VDC. Power requirements range from –42 VDC
to –57 VDC.
A newly installed ONS 15454 that is not properly connected to its power
supply does not operate. Power problems can be confined to a specific
ONS 15454 or affect several pieces of equipment on the site.
A loss of power or low voltage can result in a loss of traffic and causes the
LCD clock on the ONS 15454 to default to January 1, 1970, 00:04:15. To
reset the clock, in node view click the Provisioning > General > General
tabs and change the Date and Time fields.
Complete the
page
Verify that the –48 VDC #8 power terminals are properly connected to a fuse panel. These power
terminals are located on the lower section of the backplane EIA under the clear plastic cover.
Verify that the power cable is #12 or #14 AWG and in good condition.
Verify that the power cable connections are properly crimped. Stranded #12 or #14 AWG does not
always crimp properly with Staycon type connectors.
Verify that 20-A fuses are used in the fuse panel.
Verify that the fuses are not blown.
"Isolate the Cause of Power Supply Problems" procedure on
1-103.
Cisco ONS 15454 Troubleshooting Guide, R4.6
1.11.1 Power Supply Problems
1-103