Chapter 2 Alarm
Handling Procedure
1.
Remove and insert the corresponding board;
2.
Replace the corresponding board;
3.
Replace PM board;
4.
Replace the backplane.
2.4.18 406 Fan failure
Alarm Property
l
Alarm Code: 406
l
Alarm Information: This alarm is reported if the fan speed is too slow.
l
Alarm Level: Warning
l
Alarm Type: Equipment Alarm
Sub-code Description
l
Sub-code 1: Fan 1 Failure
l
Sub-code 2: Fan 2 Failure
l
Sub-code 3: Fan 3 Failure
l
Sub-code 4: Fan 4 Failure
l
Sub-code 5: Fan 5 Failure
l
Sub-code 6: Fan 6 Failure
Effect on the System
This alarm may cause the equipment overtemperature alarm and causes boards or
the system to operate improperly, the system performance to degrade, and services to
interrupt.
Possible Causes
The fan fails.
Handling Procedure
Replace the fan. If the alarm persists, the shelf may be faulty because the power supply
to the fan is introduced from the backplane. Replace the shelf.
1.
Check whether the fan is faulty.
l
If yes, replace the fan.
l
If no, go to step 2.
2.
Check if the shelf is faulty. If yes, replace the shelf.
2-79
SJ-20111008094748-008|2012–05–30 (R1.1)
ZTE Proprietary and Confidential