© National Instruments
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B-27
Figure B-6.
Installing the Onboard Battery
Caution
There is a danger of explosion if the onboard battery is installed upside
down (which reverses its polarities). This battery must be replaced only with the same
or an equivalent type recommended by the manufacturer (CR2032).
System Cooling
Four, 4 cm counter-rotating fans provide the cooling for the system. Each fan unit is actually
made up of two fans joined back-to-back, which rotate in opposite directions. This counter-
rotating action generates exceptional airflow and is effective in dampening vibration levels.
It is very important that the chassis top cover is installed for the cooling air to circulate properly
through the chassis and cool the components.
Installing Fans
Fan speed is controlled by system temperature via IPMI. If a fan fails, the remaining fans will
ramp up to full speed. The system will continue to operate, but at reduced performance. Replace
any failed fan at your earliest convenience with the same type and model.
Complete the following steps to replace a system fan.
1.
If necessary, open the chassis while the power is running to determine which fan requires
replacement. Don
not
run the server for an extended period of time with the chassis open.
2.
Power down the system and unplug the AC power cord from the rear of the power supply.
Open the chassis cover.
3.
Remove the failed fan's cable from the connector on the motherboard.
4.
Gently pull upward to remove the failed fan from the housing.
5.
Place the new fan into the vacant space in the housing. Make sure that the arrows on the side
of the fan (indicating air direction) point in the same direction as the arrows on the other
fans.
6.
Connect the fan wires to the same fan header as the fan just removed.
7.
Plug the power cord into the rear of the power supply, power up the system and check that
the fan is working properly before replacing the chassis cover.
BATTERY HOLDER
LITHIUM BATTERY
OR