Controller Fan; Figure 21. Controller Unit Airflow - IBM Netfinity FASt T500 User Reference

Attention: Use proper facilities to recycle the used battery CRU. If the battery CRU is
physically damaged or leaking electrolyte gel, DO NOT ship it to a recycling
center. The battery contains sealed lead acid batteries that might be
considered hazardous material. You must handle this unit in accordance with
all applicable local and federal regulations.
11 Dispose of the used battery CRU according to local and federal regulations, which
might include hazardous material handling procedures.

Controller fan

The controller fan is a single, removable unit containing two cooling fans and temperature
monitoring circuitry. The controller fan plugs directly into a slot on the front of the
controller unit, to the left of the controllers (see
lights provide overall system status information (see
in the controller fan provide a redundant cooling system to both controller CRUs. If one
fan fails, the other continues to operate, providing sufficient air circulation to prevent the
controllers from overheating until you can replace the entire controller fan.
To prevent cooling problems, the controller unit must have proper air circulation
throughout the chassis. Cooling problems include any malfunctions or obstructions that
impede air flow and cause one or more components in the controller unit to overheat.
Make sure that the ambient air temperature around the controller unit is within the
environmental requirements. To boost air circulation, the controller unit chassis has air
vents along its top and sides. These vents serve as air intake and exhaust passages. Always
keep vents clean and free of obstructions.
Figure 21 shows the controller unit air flow. Make sure your installation site allows
adequate ventilation to the controller unit during operation.
Note: Allow at least 60 cm (2 ft) of clearance in front of and behind the controller unit for
proper ventilation.

Figure 21. Controller unit airflow

Chapter 3. Replacing controller unit components
Figure 22 on page 41). Five indicator
Figure 23 on page 41). The dual fans
39