Troubleshooting The Power And Cooling Systems; Normal Indications; Fault Indications; Environmental Reporting Features - Cisco CISCO1841 - 1841 Integrated Services Router Hardware Installation Manual

Solving Problems

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Troubleshooting the Power and Cooling Systems

Both the system LED and the fans can help you troubleshoot a power problem. To attempt to isolate the
problem, check the items identified in the sections that follow.

Normal Indications

With the power switch on, the normal indications are:
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Fault Indications

Check the following symptoms to locate or eliminate faults in the power and cooling systems:
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Environmental Reporting Features

The following system messages indicate environmental problems:
Cisco 1800 Series Integrated Services Routers (Fixed) Hardware Installation Guide
6-2
Power and cooling systems—External power source, power cable, router power supply and circuit
breaker, and router blower and fan. Also consider inadequate ventilation or air circulation.
Cables—External cables that connect the router to the network.
SYS OK LED on green and continuous
Fans operating
POE LED on green and continuous if the inline power supply is installed
With the power switch on, is the SYS OK LED on?
If the LED is green and continuous, the router is receiving power and is functional.
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If the LED is off, check the power source and power cable.
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With the power switch on and the SYS OK LED on and green, do the fans operate?
If no, check the fans.
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If yes, the power system is functioning.
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Does the router shut down after being on a short time?
Check for an environmentally induced shutdown. See the
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section on page 6-2.
Check the environmental site requirements in the
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page 2-4.
Check for a power supply failure by inspecting the SYS OK LED on the front panel. If the LED
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is green, the power supply is functional.
Does the router partially boot, but the LEDs do not come on?
Check for a power supply failure by inspecting the SYS OK LED on the front panel of the
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router. If the SYS OK LED is blinking or continuous green, the power supply is functional.
If the SYS OK LED is not on, see the
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section of the Preface
"Cisco One-Year Limited Hardware Warranty Terms"
for warranty information, or contact customer service.
Chapter 6
"Environmental Reporting Features"
"General Site Requirements" section on
Troubleshooting
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