Maintaining The Air Filter; Verifying A Fan Failure; Verifying An Impeller Failure - Juniper M Series Monitoring And Troubleshooting Manual

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Maintaining the Air Filter

Documentation

Documentation

To maintain the air filter on M40, M40e, M120, M160, T320, and T640 routers:

Check the air filter for dust, debris, or holes. If the air filter needs cleaning, clean it as

described in the appropriate hardware guide.

If the air filter needs repair, replace it as described in the appropriate hardware guide.

Because the impellers and fans are quite powerful, it is

important to keep the air filter in place while the router is operating. The

impellers and fans could pull in foreign material, such as bits of wire,

through an unfiltered air intake, resulting in damage to router components.

Checklist for Monitoring the Cooling System on page 317

To verify a fan failure by performing a swap test.

To verify a fan failure:

Perform a swap test on the fan. Remove the problem fan tray and put it into another

bay. If the fan tray does not work in the other bay, it is probably faulty and must be

replaced. If the fan tray works in another bay, there is probably a problem with the

power connectivity from the midplane.

Check the fan power connector.

Check the fan connector on the router midplane.

If the fan fails, replace it as described in the appropriate hardware guide. The fans are

hot-removable and hot-insertable. You can replace the fans without powering down

The cooling system components (fans and impellers) do not have

serial numbers. Therefore, you will not see a serial number listed in the

hardware inventory or a serial number ID label on the component.

Checklist for Monitoring the Cooling System on page 317

To verify an impeller failure.

Chapter 11: Monitoring the Cooling System