Cisco MWR-1941-DC-2T1 Hardware Installation Guide - Page 62

Troubleshooting the Power and Cooling Systems, Environmental Reporting Features - mwr dc a state

Get Cisco MWR-1941-DC-2T1 - MWR 1941 Mobile Wireless Edge Router PDF manuals and user guides View all Cisco MWR-1941-DC-2T1 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 62 highlights

Problem Solving Appendix A Troubleshooting Troubleshooting the Power and Cooling Systems Both the power LED and the fans can help you troubleshoot a power problem. Check the following items to help isolate the problem: Check the following items to help isolate problems with the power supply installation: • With the MWR 1941-DC router connected to the power source, is the power LED on the front panel on? - If not, check the DC input, DC source, and the power supply wiring. - Check the power supply connection to the motherboard. - If the power LED is still off, the problem might be a power supply failure. • Does the router shut down after being on a short time? - Check the fans. If the fans are not working, the router will overheat and shut itself down. - If the fans are not working, check the power supply connections to the fans. - Ensure that the chassis intake and exhaust vents are clear. Check the environmental site requirements in the "System Specifications" section on page 1-9. • Does the router partially boot, but the LEDs do not go on? - Check for a power supply failure by inspecting the power LED on the front panel of the router. If the power LED is on, the power supply is functional. - If the power LED is not on, refer to the Cisco Information Packet for warranty information or contact customer service. Environmental Reporting Features The MWR 1941-DC router has a temperature sensor to detect over-temperature conditions inside the chassis. The over-temperature detection trips at 75°C +/- 5%. This condition is reported to the processor as an interrupt and software then takes action on this interrupt to generate the appropriate alarming. If the router reaches a temperature of 90°C, the power supply will cycle to prevent the box from exceeding that temperature in a powered up state. If the router is operating at an abnormally high temperature, you see the following message on the console screen: %SYS-1-OVERTEMP: System detected OVERTEMPERATURE condition. Please resolve cooling problem immediately! Some causes of abnormally high router temperature are: • Fan failure • Air conditioner failure in the room • Air blockage to cooling vents Take steps to correct the problem. For information about environmental operating conditions, see "System Specifications" section on page 1-9. Cisco MWR 1941-DC Mobile Wireless Edge Router Hardware Installation Guide A-2 78-15827-06B0

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
A-2
Cisco MWR 1941-DC Mobile Wireless Edge Router Hardware Installation Guide
78-15827-06B0
Appendix A
Troubleshooting
Problem Solving
Troubleshooting the Power and Cooling Systems
Both the power LED and the fans can help you troubleshoot a power problem. Check the following items
to help isolate the problem:
Check the following items to help isolate problems with the power supply installation:
•
With the MWR 1941-DC router connected to the power source, is the power LED on the front panel
on?
–
If not, check the DC input, DC source, and the power supply wiring.
–
Check the power supply connection to the motherboard.
–
If the power LED is still off, the problem might be a power supply failure.
•
Does the router shut down after being on a short time?
–
Check the fans. If the fans are not working, the router will overheat and shut itself down.
–
If the fans are not working, check the power supply connections to the fans.
–
Ensure that the chassis intake and exhaust vents are clear.
Check the environmental site requirements in the
“System Specifications” section on page 1-9
.
•
Does the router partially boot, but the LEDs do not go on?
–
Check for a power supply failure by inspecting the power LED on the front panel of the router.
If the power LED is on, the power supply is functional.
–
If the power LED is not on, refer to the
Cisco Information Packet
for warranty information or
contact customer service.
Environmental Reporting Features
The MWR 1941-DC router has a temperature sensor to detect over-temperature conditions inside the
chassis. The over-temperature detection trips at 75°C +/- 5%. This condition is reported to the processor
as an interrupt and software then takes action on this interrupt to generate the appropriate alarming. If
the router reaches a temperature of 90°C, the power supply will cycle to prevent the box from exceeding
that temperature in a powered up state.
If the router is operating at an abnormally high temperature, you see the following message on the
console screen:
%SYS-1-OVERTEMP: System detected OVERTEMPERATURE condition. Please resolve cooling problem
immediately!
Some causes of abnormally high router temperature are:
•
Fan failure
•
Air conditioner failure in the room
•
Air blockage to cooling vents
Take steps to correct the problem. For information about environmental operating conditions, see
“System Specifications” section on page 1-9
.