Replace a PA-5450 Fan Assembly
Table of Contents
Replace a PA-5450 Fan Assembly
Learn how to replace a failed fan assembly in the PA-5450
firewall.
The PA-5450 has four dual-rotor, single fan assemblies on its rear side. While facing the rear of
the firewall, the fan assemblies are labeled 1, 2, 3, and 4 from left to right. Each
single fan assembly can be individually removed and replaced. When a fan is
functioning as expected, the fan LED on the MPC glows green. If a fan fails, the fan
LED glows red. If this occurs, replace the fan immediately to avoid service
interruption.
You can replace a failed fan assembly while the firewall is powered on; however,
there is a time limit of 120 seconds starting when the fan assembly is removed
to replace it before the thermal protection circuit automatically powers down
the firewall.
- Put the provided ESD wrist strap on your wrist ensuring that the metal contact is touching your skin. Then attach (snap) one end of the ground cable to the wrist strap and remove the alligator clip from the banana clip on the other end of the ESD grounding cable. Plug the banana clip end into the ESD port located on the rear of the appliance before handling ESD sensitive hardware. For details on the ESD port location, see PA-5450 Back Panel.When removing a fan assembly, first pull the fan assembly out about 1 inch (2.5cm) and wait 10 seconds. This allows enough time for the working fans to stop spinning.
- Remove the replacement fan assembly from the packaging and have it ready.
- Identify the failed fan assembly by checking the fault LEDs of each fan. In the event of a failure, the LED on the fan assembly will be red.
- Place your thumb under the thumb tab located on the bottom of the fan assembly. Gripping the fan assembly handle with your fingers, push up on the thumb tab.
- While still gripping the fan assembly handle, gently pull the fan assembly out of its slot.
- Install the replacement fan by sliding it into the vacant fan slot, ensuring that the thumb tab is on the bottom.
- Verify that the new fan assembly is operational by noting the status of the fan LED on the MPC. You can also view the status of the fan assemblies by entering the following command:
admin@PA-5450> show system environmentals fan-trayTo view the status of each fan on a fan assembly, run the following command:admin@PA-5450> show system environmentals fans
