Lennox · PRODIGY 2.0 Unit Controller
Setting Configuration ID 2, Position 1 to 'D' means the M3 unit controller will not monitor the air flow switch (S52). This is typically used when S52 is physically connected to a DDC controller instead.
Click steps to track your progress.
Navigate to SETUP > INSTALL > CONFIGURATION ID 2.
Set Position 1 to 'D' to disable M3 unit controller monitoring of S52.
Save the configuration changes.