The Daikin KEH063A4E Mini SPlit Drain Pan Heater connects directly into the control board of the outdoor condenser. This unit helps to mitigate the risk of ice forming on the base and in the drain pan of an outdoor condenser and damaging your system. The heater fits the following models: 2MXS18NMVJU, 3MXS24RMVJU(A), 4MXS36RMVJU(A), 2MXL18QMVJUA & 3MXL24RMVJUA.