Recognize An Over-Temperature Condition; Troubleshoot An Over-Temperature Condition - Dell PowerEdge M IO Aggregator Command Reference Manual

Recognize an Over-Temperature Condition

An over-temperature condition occurs for one of two reasons:
• The card genuinely is too hot.
• A sensor has malfunctioned.
Inspect cards adjacent to the one reporting condition to discover the cause.
• If directly adjacent cards are not a normal temperature, suspect a genuine overheating condition.
• If directly adjacent cards are a normal temperature, suspect a faulty sensor.
When the system detects a genuine over-temperature condition, it powers off the card. To recognize this
condition, look for the system messages in
Message 1 Over Temperature Condition System Messages
CHMGR-2-MAJOR_TEMP: Major alarm: chassis temperature high (temperature reaches or exceeds threshold of
[value]C)
CHMGR-2-TEMP_SHUTDOWN_WARN: WARNING! temperature is [value]C; approaching shutdown threshold of [value]C
To view the programmed alarm thresholds levels, including the shutdown value, use the
command
threshold
Figure 22-7. show alarms threshold Command Example
FTOS#show alarms threshold
-- Temperature Limits (deg C)
---------------------------------------------------------------------------
BelowNormal
Unit0
FTOS#

Troubleshoot an Over-Temperature Condition

To troubleshoot an over-temperature condition:
1. Use the
show environment
2. Check air flow through the system. Ensure the air ducts are clean and that all fans are working
correctly.
3. After the software has determined that the temperature levels are within normal limits, the card can be
re-powered safely. To bring the stack unit back online, use the
In addition, Dell Force10 requires that you install blanks in all slots without a line card to control airflow
for adequate system cooling.
(Figure 22-7).
--
Normal Elevated
<=40 41
commands to monitor the temperature levels.
Message 1.
Critical Trip/Shutdown
71 81
power-on
show alarms
86
command in EXEC mode.
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