Trane S9V2B040U3PSBB Installer's Manual page 104

S S e e q q u u e e n n c c e e o o f f O O p p e e r r a a t t i i o o n n
ARF = Airflow
160 = 1600 requested cfm (value shown x 10)
7. When the temperature is lowered enough to satisfy
the thermostat setting, contacts R-Y1-Y2-G will
open.
104
8. The OD unit shuts off and the indoor blower shuts
off, unless a blower off delay has been enabled in
the IFC setup menu options. The seven segment
LED will read "IDL" = Idle, no thermostat demand.
18-CE01D1-1M-EN