Variable Speed Vent Motor Models - American Standard 50A65-475 Manual

Variable Speed Vent Motor Models

The ECM TM motor has an output circuit used to report
the motor's R.P.M. and pressure switch fault codes to
the White-Rodgers' IFC. The White-Rodgers' IFC has a
Red Status LED
Out
Slow Flash,
No Call for Heat
Slow Flash or Fast Flash
Fast Flash,
Call For Heat
3 Flashes
3 Flashes
*LED will be on only when the IFC is calling for High Speed operation. The IFC will cycle the Vent Motor and Gas Valve
to low if a High Speed Pressure Switch Fault occurs.
green LED labeled RPM to indicate proper operation
and faults when detected.
Green IFC RPM LED
Out
Slow Bright Flash
Out
Dimly Pulsed
On*
Off or Slow Bright Flash
34
Fault
No Power
No Call For Motor
Operation, Motor OK
No Power to Motor or
Motor Defective
No Fault Present During Low
or High Speed Operation
Fault with High Pressure
Switch Circuit or Vent System
Fault with Low Pressure Switch
Circuit or Vent System