IBM SAN512B-6, Installation, Service And User Manual

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Note: Each fan assembly contains two fans for a total of six fans for three installed
fan assemblies. The device requires 5 fans out of 6 functioning fans for operation.
If hot-swapping a fan assembly, be sure to have the replacement fan assembly
ready to install before removing a faulty fan assembly and replace as soon as
possible.
Note: If a fan assembly has failed, do not remove it from chassis unless a FRU is
available for replacement. If the slot is left empty for an extended time period, this
could cause chassis air-leakage and overheating.
Note: Make sure that captive screws securing fan assemblies to chassis are
tightened. If not, high pressure from fan operation may unseat fan from chassis
connectors.
Fan assembly fault indicators
Use one of the following methods to determine if a fan assembly is faulty:
v Check the fan status LED.
– Steady amber - fan assembly has a failure (full or partial).
– Slow-flashing amber (on 2 seconds, then off 2 seconds) - fan assembly is not
seated correctly or is faulty.
– Fast-flashing amber (on ½ second, then off ½ second) - environmental range
exceeded.
v Enter fanShow . If status of fan assembly displays absent or faulty, check if
assembly is seated in chassis. If it is, power supply could be faulty or is not
receiving power for some reason.
v
Enter
sensorShow
to determine if a fan is running above average temperatures of
other installed fan(s).
v Enter errDump to display the system error log.
For more information on LED operation, refer to“Interpreting fan assembly LEDs”
on page 82.
For output examples and additional information on Fabric OS commands, refer
to“Using monitoring commands” on page 85 and theFabric OS Command Reference.
For more information about error messages, refer to theFabric OS Message Reference.
Fan assembly task guide
This section contains a guide to more complete, detailed steps in this section for
installing or replacing fan assemblies when the device is running (hot swap) or
must be powered off (cold swap). References are provided to the more detailed
removal and installation steps for further information.
Note: Each fan assembly contains 3 fans for a total of 6 fans for three installed fan
assemblies. The device requires 5 fans out of 6 functioning fans for operation. If
hot-swapping a fan assembly, be sure to have the replacement fan assembly ready
to install before removing a faulty fan assembly and replace as soon as possible.
Note:
If a fan assembly has failed, do not remove it from chassis unless a FRU is
available for replacement. If the slot is left empty for an extended time period, this
could cause chassis air-leakage and overheating.
Chapter 12. Fan Assemblies
177