ABOUT THE AIR MONITOR
The TPP640S is designed with an air monitor
to track the quality of your air. Over time the
monitor can become dirty and may require clean-
ing. The main symptom of a dirty air monitor is the
LED display remains frozen on one light color. In or-
der to clean the air monitor you must use a vacuum
to clear the monitor chamber.
CLEANING THE AIR MONITOR
1. Power off and unplug unit.
2. Locate the 3 small vent holes in the rear of the
unit just about the inlet grill.
3. Use a vacuum cleaner hose to suction any dust or
dirt that may have accumulated inside the moni-
tor chamber.
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