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OSN 500 550 580 V100R008C50 Alarms and Performance Events Reference 02

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The PWR_TEMP_OVERTH alarm indicates that the temperature of the power module crosses the specified threshold.


Alarm Severity Alarm Type


Equipment alarm


When you view an alarm on the network management system, select the alarm. In the Alarm Details field display the related parameters of the alarm. The alarm parameters are in the following format: Alarm Parameters (hex): parameter1 parameter2...parameterN. For details about each parameter, refer to the following table.

Name Meaning

Parameter 1

Indicates the number of the power module whose temperature crosses the specified threshold.

Impact on the System

When this alarm is reported, a board may report a temperature-related alarm, and work unstably.

Possible Causes

Possible causes of the PWR_TEMP_OVERTH alarm are as follows:

  • Fans are faulty.
  • The ambient temperature is high.
  • The power module is faulty.


  1. Check whether the fans are working normally.

    If... Then...

    The fans stop working or are faulty

    Restart or replace the fans. Check whether the alarm is cleared. If the alarm persists, go to the next step.

    The fans are working normally

    Go to the next step.

  2. Check whether the ambient temperature is high.

    If... Then...
    The ambient temperature is high Decrease the ambient temperature to the specified range, and then check whether the alarm is cleared. If the alarm persists, go to the next step.
    The ambient temperature is normal Go to the next step.

  3. Check whether the power module is faulty.

    If... Then...
    The power module is faulty Replace the power board with a functioning one, and then check whether the alarm is cleared. If the alarm persists, go to the next step.
    The power module works normally Contact Huawei technical support engineers for handling the alarm.

Related Information


Updated: 2019-01-21

Document ID: EDOC1100020975

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