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after five minutes to prevent potentially undetectable overheating. However, the
switches will shut down sooner if the higher-level temperature threshold is
exceeded.
This section includes the following topics.
v "Removing a Fan Module"
v Installing a Fan Module on the IBM SAN50C-R Switch, page 1-18"Installing a
Removing a Fan Module
About this task
The fan module is designed to be removed and replaced while the system is
operating without presenting an electrical hazard or damaging the system.
CAUTION:
The IBM Storage Networking SAN c-type Family Switches have internal
temperature sensors that can shut down the system if the temperature within the
chassis exceed certain safety thresholds. To accurately monitor the system
temperature, the temperature sensors require sufficient airflow through the
chassis. In the event that a fan module is removed from the chassis and the
airflow is reduced, the system will bypass the temperature sensor information
and shut down after five minutes to prevent undetected overheating. However,
the switches will shut down sooner if the major temperature threshold is
exceeded.
To remove an existing fan module, follow these steps:
Procedure
1. Loosen the four captive screws on the module being removed.
2. Grasp the fan module with both hands and pull it outward to unseat the power
3. Pull the fan module clear of the chassis.
Installing a Fan Module
About this task
To install a new fan module, follow these steps.
Procedure
1. Place the fan module into the rear chassis cavity so that it rests on the chassis.
2. If the switch is powered on, listen for the fans; you should immediately hear
26
SAN50C-R Installation, Service, and User Guide
Fan Module"
connector from the backplane.
Note: When removing the fan tray, keep your hands and fingers away from the
spinning fan blades. Let the fan blades completely stop before you remove the
fan tray.
Lift the fan module up slightly to align the top and bottom chassis guides, then
push the fan module into the chassis until it seats in the backplane and the
captive screws make contact with the chassis. The fan module just snaps in.
them operating. If you do not hear them, ensure that the fan module is inserted
completely in the chassis and the outside surface of the fan module is flush
with the outside surface of the chassis.
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