Cisco 7600-SIP-400 - SPA Interface Processor 400 Installation Manual page 125

Chapter 4 Troubleshooting
Table 4-2
Color
Green
Red
Troubleshooting Inadequate Power for all the Modules
If there is not enough power to initiate all the modules, follow the solutions listed in
Table 4-3
Problem
Not enough power to initiate
all the modules
Troubleshooting Power Latch Up
When two power supplies are present in the system, they work in redundant mode where 50% of the
power is drawn from each power supply.
Problem
Lost redundancy and system operates on a single
power supply source.
Troubleshooting the Cooling Sub-System
The cooling system dissipates heat generated by the chassis and controls the temperature of chassis
components. The cooling system has a fully redundant architecture that allows the chassis to continue
operating with a single-fault failure (such as a single fan or fan tray failure).
The chassis cooling system includes:
•
OL-4503-26
maps the LED indicator information in a power supply sub-system.
Table 4-2
Indicator
Power input Power is available; however if the LED is OFF, it indicates lack
Output fail
Troubleshooting Inadequate Power for all the Modules
Table 4-4
One or Two fan trays (depending upon the chassis).
Troubleshooting Inadequate Power for all the Modules
Power Supply Indicator Information
Description
of power.
Power is not available; however, if the LED is OFF, it indicates
the presence of the output power.
Solution
Use the power redundancy-mode combined command to
1.
combine the two power supplies in the config terminal mode OR
If dual RP is not required, apply the value of the
2.
POWERNORESERVE=1 on ROMMON mode.
Table 4-4 lists the solutions for the power latch issues.
Troubleshooting Power Latch Up Issues
Solution
Check if the power drawn by the system is
1.
more than five thirds of the power supply
output.
2. Reduce the system power.
Reload the system or re-insert the power
3.
supply module.
Cisco 7600 Series Router Installation Guide
Table 4-3.
4-5