Causes and how to clear a FAN FAIL alarm on a RTN910

FAN_FAIL

Description

The FAN_FAIL is an alarm indicating that the fan is faulty.


Attribute

Parameters

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.

Impact on the System

When the FAN_FAIL alarm occurs, the heat dissipation of the system is affected.
After an alarm is reported, clear it immediately. Otherwise, services may be interrupted or equipment may be damaged.
When a fan is faulty, perform the following operations:

• Replace the faulty fan with one that works properly within a period of 96 hours if the ambient temperature ranges from 0°C to 40°C.
• Replace the faulty fan with one that works properly within a period of 24 hours if the ambient temperature is higher than 40°C.
  

• Cause 1: The board and the backplane are connected improperly.
• Cause 2: Fan failure occurs.
  

• Cause 1: The board and the backplane are connected improperly.
  
  • Remove the fan board. Clean the dust on the fan and reinsert the fan board.

    If...	Then...
    The alarm is cleared after the board is removed and inserted	The fault is rectified. End the alarm handling.
    The alarm persists after the board is removed and inserted	Go to Cause 2.

    
    
    
• Cause 2: Fan failure occurs.
  
  • Replace the alarmed fan board.