Which of the following statements regarding an undercharged TXV system is false?

The statement regarding an undercharged TXV (Thermostatic Expansion Valve) system that is considered false is that "more heat than normal will be transferred to the high side."

In an undercharged system, the amount of refrigerant is insufficient for the required heat exchange process. This causes several operational issues, particularly on the low side of the system. The refrigerant entering the evaporator may not absorb enough heat because there is not enough refrigerant to effectively carry away the heat from the evaporator coil. As a result, less heat is actually transferred to the high side.

Conversely, the other statements align with the characteristics of an undercharged system. The system's effectiveness decreases, leading to less cooling capacity. It can cause the evaporator to operate at lower pressures due to reduced refrigerant flow. As the refrigerant flow diminishes, the pressures in the evaporator actually drop, contributing to the poor performance.

Thus, while the undercharged TXV system experiences less heat transfer to the high side, the first statement suggesting more heat is transferred is incorrect, making it the false statement in the context of this question.