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detection operation will not be affected. Press NEXT when the airflow
verification check is complete.
If the system has an indoor unit equipped with an updated-version
CFM-controlled blower system (typically found in equipment
manufactured after November 2017), the screen will display the static
pressure (in inches) across the equipment at a pre-determined target
airflow CFM. If the achieved (actual) CFM is unacceptably below the
target CFM, a yellow notice will appear to invite the user to see the
associated information screen; equipment operation and the TrueSense™
dirty filter detection operation will not be affected. Press NEXT when the
airflow verification check is complete.
NOTE: The airflow verification check occurs at initial installation, or
when FULL INSTALLATION or AIRFLOW VERIFICATION
TEST are selected in the INSTALLATION & SERVICE menu.
5.12. Duct Assessment (zoned systems only)
The duct assessment screen will be displayed next for zoned systems.
Touch NEXT to start Duct Assessment. Duct Assessment will measure
the relative size of the ductwork, up to and through the dampers. These
measurements are used to control the correct amount of airflow in the
zoned system. Status messages will appear on the screen to indicate what
the system is doing. The process will take approximately two minutes per
zone. The duct assessment will override a call for heat or cool.
A duct assessment will automatically occur each day at a user selectable
time. The factory default time is 1:00 p.m. local time but, may be
changed by entering the Zoning Setup menu. If there is an active call for
heating or cooling, the system will wait until the call is satisfied before it
performs the duct assessment. The system will first open all zones and
drive the blower to 175 CFM/ton of cooling (or the minimum indoor
unit’s airflow, whichever is greater). It will then take a static pressure
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