Lennox ComfortSense 8500 Series - Page 28

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Table 6. Error Codes and Reminders
Condition Issue Display System Action
Action to Clear / Recovery
Condition
Minor
Outdoor Air Damper
Error (During Free
Cooling)
Economizer
Fault
Displayed on

During free cooling damper
is not modulating.
Minor
Not Economizing
When Outdoor Air
is Suitable
Economizer
Fault
Displayed on

May be due to the damper
motor being unplugged
or disconnected.
Minor
Economizing When
Outdoor Air is Not
Suitable
Economizer
Fault
Displayed on

This may be due to damper motor
being blocked or stuck open
and therefore not closing.