Working With Hot-Swap Cooling Fans - IBM EXP15 Hardware Maintenance Manual

Working with hot-swap cooling fans

Attention
Do not run the expansion unit without adequate
ventilation and cooling, because it might cause
damage to the internal components and circuitry.
The fans are interchangeable and customer replaceable
and do not require preventive maintenance. The fans help
maintain proper air circulation across the components
inside the expansion unit. Air flows through the expansion
unit from the front to the back.
You can hot-swap the fans (replace them while the
expansion unit is turned on and running), as long as you
complete the exchange within 10 minutes. This time limit
applies only to the total time that a fan is out of the
expansion unit, beginning when you remove the failed unit
and ending when you reseat the new one. This does not
include the time it takes you to perform this entire
procedure (checking LEDs, unpacking the new fan, and so
on).
Both fan units must always be in place, even if one is not
functioning properly, to maintain proper cooling.
Use the following procedure to replace a hot-swap fan:
1. Check the LEDs on the back of the expansion unit.
2. If the amber Fault LED is on, remove the failed fan.
a. Slide the latch to unlock the fan CRU.
b. Use the handle (black knob) to pull the fan from
the expansion unit.
3. Install the new fan unit.
a. Place the fan CRU in front of the fan slot.
b. Hold the latch open and slide the fan all the way
into the slot. If the fan does not go into the bay,
rotate it 180°. Ensure that the latch is on the
side closest to the center of the expansion unit
.
c. Release the latch. If the lever remains open,
pull back on the fan slightly, then push it in again
until the latch snaps into place.
4. Check the LEDs.
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IBM Netfinity EXP15, EXP200, EXP500 HMM