Analyzing system performance data, such as temperature, pressure, and energy consumption trends, can help detect refrigerant charge issues. For instance, if the system is consistently failing to reach the desired temperature, or if energy consumption is higher than expected, it may indicate an improper refrigerant charge. Additionally, monitoring pressure gauges and observing unusual pressure drops or increases can indicate refrigerant leaks or overcharging. By analyzing these data points, HVAC professionals can identify potential issues and take corrective action.