The Enterprise[TM] 450 system's CPU temperature is not within the acceptable range

Asset ID:	1-72-1003523.1
Update Date:	2009-02-12
Keywords:

Solution Type Problem Resolution Sure

Solution 1003523.1 : The Enterprise[TM] 450 system's CPU temperature is not within the acceptable range

Related Items


Sun Enterprise 450 Server

Related Categories


GCS>Sun Microsystems>Servers>Entry-Level Servers

PreviouslyPublishedAs
204953

Symptoms
The grill in front of the CPU Fan Tray may become clogged with dust causing inefficient cooling and a higher than normal CPU temperature. A thermal error condition may be reported by prtdiag.

SunCheckup could report this as follows:

 CHECK ID: 1478
SEVERITY: HIGH
PROBLEM:
The Enterprise 450 system's CPU temperature is not within
the acceptable range.
RECOMMEND:
Investigate and schedule diagnostics for the E450 with a Sun
Service Representative. Check the airfilters for excessive dirt.

The TLP analysis could also include (for example):

 Check Analysis
The E450 CPU's temperature reading is outside of acceptable
operating conditions. CPU temperatures must be below 50C.
Analysis shows: CPU 1 has a recorded temperature of 53 degrees
Celsius CPU 3 has a recorded temperature of 51 degrees Celsius

In the Sun Enterprise[TM] 450 Server, a high central processing unit (CPU) temperature and a high CPU fan speed can cause problems even if ambient temperature is low. The system will shutdown if the CPU reaches 80 degrees Celsius .

If diagnostics report no problem with the fan tray module or with any other parts of the system, the system may simply be suffering from an accumulation of dust in the air intake path of the CPU fans.

Resolution
[See the exploded view of the E450 in the System Handbook for designation of parts.]

The system must be shutdown as disengaging the left panel will cut DC power to internal components
Remove the Removable Media Door Assembly
Loosen the 2 large captive screws at the back of the Left Panel and slide the panel back 1cm
Remove the Front Door Assembly: remove 6 screws around the frame, unlatch 4 tabs down the right side, slide the whole assembly left
Vacuum the dust out through the left side grill
Reassemble the system
Monitor CPU temperature and fan speed to confirm resolution. Temperatures should be around 40C and the fan speed around 31 (3100 rpm).

For examples of prtdiag before and after cleaning, see Additional Information below.

Product
Sun Enterprise 450 Server

E450, CPU temperature, fan speed, thermal error
Previously Published As
77503

Change History
Date: 2006-03-31
User Name: 7058
Action: Approved
Comment: Changes are OK to republish.
Tags/review date OK.
Version: 8
Date: 2006-03-30
User Name: 7058
Action: Accept
Comment:
Version: 0
Date: 2006-03-30

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