System Cooling; System Fan Failure; Replacing System Fans - Supermicro SuperServer SYS-741GE-TNRT User Manual

3.9 System Cooling

Heavy-duty fans provide cooling for the chassis. Four fans are located in the mid-section of
the chassis, two fans are located in the rear, and two optional fans can be mounted on the
external rear of the chassis, required for passive GPUs.
The internal fans come pre-installed to the chassis. Each fan is hot-swappable and can be
replaced without removing any connections.

System Fan Failure

Fan speed is controlled by system temperature through BMC. If a fan fails, the remaining
fans will ramp up to full speed. Replace any failed fan at your earliest convenience with the
same type and model (the system can continue to run with a failed fan).

Replacing System Fans

The chassis contains two types of system fans: mid-system fans and rear system fans.
Replacing Mid-System Fans (FAN-0199L4-2)
1. Determine which fan has failed. Because the fans are hot-swappable, the system does
not need to be powered-down.
2. Press the fan release tab and lift the failed fan from the chassis. Mid fans must be
pulled straight out of the chassis.
3. Place the new fan into the vacant space in the housing while making sure the arrows on
the top of the fan (indicating air direction) point in the same direction as the arrows on
the other fans. As soon as the fan is connected, it will begin working.
Replacing the Rear System Fan (FAN-0199L4-1)
1. Determine which fan has failed.
2. Press the rear fan release tab.
3. Pull the fan away from the chassis by pulling out the top first.
4. Place the new fan in the chassis, inserting the bottom of the fan first. Push the fan fully
into the housing until the fan clicks into place. Check that the fan is working properly
before replacing the chassis cover.
Chapter 3: Maintenance and Component Installation
69