Troubleshoot An Over-Temperature Condition; Recognize An Under-Voltage Condition - Dell S4048T Configuration Manual

When the system detects a genuine over-temperature condition, it powers off the card. To recognize this
condition, look for the following 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 show alarms
threshold command.
Example of the show alarms threshold Command
Dell#show alarms threshold
-- Temperature Limits (deg C)
----------------------------------------------------------------
Minor Off
Unit2 55
----------------------------------------------------------------
Minor Off
Unit3 55

Troubleshoot an Over-temperature Condition

To troubleshoot an over-temperature condition, use the following information.
1 Use the show environment commands to monitor the temperature levels.
2 Check air flow through the system. Ensure that 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, you can re-power
the card safely. To bring back the line card online, use the power-on command in EXEC mode.
In addition, to control airflow for adequate system cooling, Dell Networking requires that you install blanks in
all slots without a line card.
NOTE: Exercise care when removing a card; if it has exceeded the major or shutdown thresholds, the card
could be hot to the touch.

Recognize an Under-Voltage Condition

If the system detects an under-voltage condition, it sends an alarm.
To recognize this condition, look for the following system message: %CHMGR-1-CARD_SHUTDOWN: Major
alarm: stack unit 2 down - auto-shutdown due to under voltage.
This message indicates that the specified card is not receiving enough power. In response, the system first
shuts down Power over Ethernet (PoE). If the under-voltage condition persists, line cards are shut down, then
the RPMs.
--
Minor Major Off
60 75
Minor Major Off
60 75
Major Shutdown
80 85
Major Shutdown
80 85
Debugging and Diagnostics 1245