Replacing the Fan on a Junos Space Appliance
The Junos Space appliance ships with two field-replaceable fans that are hot-swappable. You can remove and replace a fan without powering off the appliance or disrupting any functions.
When a fan fails, the full cooling load switches to the remaining fan and the red Hardware Fault LED on the front panel of the appliance blinks and an alarm sounds.
The LEDs on the front panel of the JA2500 are arranged vertically, as shown in Figure 19.
Hardware Fault LED
Hard Disk Activity LED
The Junos Space appliance should not run on one fan for an extended period of time. Failed fans should be replaced as soon as possible.
Ensure that you have the following parts and tools available to remove the fan from the appliance chassis:
(Optional) Electrostatic discharge (ESD) grounding strap
(Optional) An antistatic bag or an antistatic mat
Removing the Fan
To remove a fan from a Junos Space appliance, do the following:
- (Optional) Place the antistatic bag or antistatic mat on a flat, stable surface.
- (Optional) Attach an ESD grounding strap to your bare wrist, and connect the strap to an external ESD point.
- Press the latch at the side of the fan, as shown Figure 20 to release the fan.
- Pull the fan module out of the chassis.
- (Optional) Place the fan module in the antistatic bag or on the antistatic mat placed on a flat, stable surface.
Installing the Fan
To install a fan in a Junos Space appliance, do the following:
- (Optional) Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to an external ESD point.
- Remove the replacement fan module from its antistatic bag.
- Insert the replacement fan into the slot for the fan module,
as shown in Figure 21, until the latch locks and you hear a clicking sound.
When you install a replacement fan, the cooling load is distributed back evenly across both the fans, and the Hardware Fault LED stops blinking and the alarm turns off.