Operating instructions

7.6 Thermal Problems and Environmental Status
Overtemperature conditions can cause the system to shut down.
The DS25 system operates in an ambient temperature range of 10ºC–35ºC.
Internal sensors monitor system and power supply temperature and shut down
the system if maximum limits are exceeded. If the system shuts down
unexpectedly:
• Ensure that the side cover (pedestal) or top cover (rack) are properly
secured.
• Verify that the ambient temperature does not exceed the specified limits.
• Make sure there are no obstructions to the airflow at the front or rear of the
system.
• Check to see that the cables inside the system are properly dressed. A
dangling cable can impede airflow to the system.
Troubleshooting with show power command
The show power command can help you determine if environmental problems
necessitate the replacement of a power supply, system fan, or CPU.
Show power indicates: Action
Bad power supply (in a
redundant configuration)
Replace the bad supply. You do not have to shut
down the system as long as two supplies are
operating.
Bad system fan Fan must be replaced. Contact HP Services.
Bad CPU fan
CPU must be replaced. Replace it or contact HP
Services for assistance.
Bad temperature
The problem could be a bad fan or an obstruction to
the airflow. Check the airflow first. If there is no
obstruction, contact HP Services to replace the bad
fan.
7-10 DS25 Owner’s Guide