28 Air Handler Display (continued)
LED Display
*
* If a system is a heat pump connected legacy, then a DFT will show on the
board in 2 instances.
1. If the heat pump calls for a defrost, Y and a W will be energized resulting
in a DFT code on the air-handler display.
2. If the heat pump calls for auxiliary heat, Y and a W will be energized
resulting in a DFT code on the air-handler display.
Descrip�on of System Status
Idle
Constant Fan
Compressor Cooling, Single-Stage (non-comm units)
Compressor Cooling, Low Stage (non-comm units)
Compressor Cooling, High Stage (non-comm units)
Compressor Cooling, Low Stage (comm units)
Compressor Cooling, High Stage (comm units)
Compressor Heat, Single-Stage (non-comm. units)
Compressor Heat, Low Stage (non-comm units)
Compressor Heat, High Stage (non-comm units)
Compressor Heat, Low Stage (Comm Units)
Compressor Heat, High Stage (Comm Units)
Electric Heat, Single Stage
Electric Heat, Low Stage
Electric Heat, High Stage
Defrost, Single Stage Electric Heat (non-comm units)
Defrost, Low Stage Electric Heat
Defrost, High Stage Electric Heat
Dehumidification
25