It is very important to check the condition of the air filter in your UAM at least once every 6 months, and more often if the environment is very humid and dusty. If the air filter is dirty then it must be cleaned with a vacuum cleaner and if it can no longer be cleaned, it should be replaced with a new filter. This procedure is described on pages 17 and 18 of the Maintenance Manual.

When checking the air filter, the after-cooler coil should also be checked and if there is any dust it should be cleaned off with a vacuum cleaner or wiped off with a damp cloth. When cleaning it make sure not to bend the metal fins.

Failure to perform these checks and cleaning procedures will result in lower oxygen levels and overheating of the concentrator.

The picture below on the left shows a dirty filter on the top and a clean one on the bottom.  The picture on the right shows a dirty after-cooler coil on the top and the same coil after being cleaned on the bottom.

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