Fan-on detection and correction
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United States of America Patent
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Nov 16, 2021
Grant Date -
Oct 15, 2020
app pub date -
Jun 23, 2020
filing date -
May 31, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
A fan-on Fault Detection Diagnostic (FDD) and correction method comprising at least one method selected from the group consisting of: detecting a Heating, Ventilating, Air Conditioning (HVAC) fan is controlled by a fan-on duration setting or a continuous or intermittent fan-on duration setting or schedule, and performing at least one action selected from the group consisting of: providing at least one fan-on alarm message, overriding the fan-on duration setting or the fan-on duration schedule, and turning off the HVAC fan for a fraction of the fan-on duration setting or schedule. Turning off the HVAC fan is based on at least one method selected from the group consisting of: a variable duration, skipping a scheduled fan-on duration setting, based on a call for cooling/heating, based on a geofencing or occupancy sensor signal, and based on a user-selected fan-on duration setting or a user-selected fan-off duration schedule.
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