22
27 Air Handler Display (continued)
LED 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
* 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.
