Working With Hot-Swap Power Supplies (Dual-Controller Models Only); Removing A Fan - IBM TotalStorage DS4300 Installation, User's, And Maintenance Manual

Fault LEDs
Latches and handles
Attention:
cooling, because it might cause damage to the internal components and circuitry.
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 storage subsystem.
2. If the amber Fault LED is on, remove the fan CRU that has failed by completing
Figure 92. Removing a fan
3. Install the new fan unit by completing the following steps:
4. Check the LEDs.

Working with hot-swap power supplies (dual-controller models only)

The storage subsystem power system consists of two power supply CRUs.
Exception: The DS4300 single-controller storage subsystem (Model 6LU/6LX) has
only one power supply CRU. Therefore, you cannot hot swap the power supply.
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IBM TotalStorage DS4300 Fibre Channel Storage Subsystem: Installation, User's, and Maintenance Guide
These amber LEDs light when a fan failure occurs.
Use the latches and handles to remove or install the fan CRUs.
Do not run the storage subsystem without adequate ventilation and
the following steps:
a. Slide the latch to unlock the fan CRU.
b. Use the handle (black knob) to pull the fan from the storage subsystem. See
Figure 92.
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 storage subsystem.
c. Release the latch. If the lever remains open, pull back on the fan slightly,
and then push it in again until the latch snaps into place.
The Fault LEDs turn off after a few seconds. If they remain on, see
"Troubleshooting" on page 145.