What are the inputs of the Trane defrost control?

The inputs of the Trane defrost control are crucial for determining when the heat pump should initiate a defrost cycle to remove frost buildup on the outdoor coil. In cold weather conditions, frost can accumulate on the coil and negatively affect efficiency.

The low pressure cut-out is important because it helps protect the system by measuring the refrigerant pressure; if it's too low, it can signal that a defrost cycle may be necessary. The coil sensor plays a vital role in monitoring the temperature of the outdoor coil itself, which helps to determine if frost is forming. Additionally, the outdoor temperature sensor provides data on the ambient temperature around the heat pump, allowing the system to assess conditions conducive to frost formation.

These inputs work together to ensure the heat pump operates efficiently and effectively in maintaining temperature and preventing the performance issues associated with ice buildup. Other options do not represent the specific sensors and controls involved in the defrost function.