Final answer:
Operating the indoor fan at excessive speeds decreases the cooling efficiency of the system, as it may not allow sufficient time for air to cool over the cooling coils or could lead to the coil freezing, both of which reduce the effectiveness of the heat exchange.
Step-by-step explanation:
When the indoor fan of a cooling system operates at excessive speeds, the consequence impacts the overall cooling efficiency of the system. An excessively fast fan can lead to a couple of potential outcomes. Firstly, it can cause higher airflow, meaning it may not allow sufficient time for the air to cool as it passes over the cooling coils, thus reducing the cooling effect. Secondly, it could lead to excessive cooling at the coil, causing the coil to freeze, which also reduces cooling efficiency and might damage the system.
Therefore, the answer is that the cooling efficiency will decrease rather than increase. This is because the process of heat exchange needs sufficient time to occur effectively, and an overly fast airflow can short-circuit this process. To optimize efficiency, fans should operate at a speed that allows proper heat transfer from the indoor air as it passes over the evaporator coils. Excessive speed can disturb this balance and reduce the overall cooling effect, leading to a decrease in efficiency. It is also important to note that the indoor temperature might fluctuate depending on various factors, including how quickly the air is distributed and exchanged within the space.