The answer to 'my ductless system keeps shutting off' is that there could be several common causes, such as a refrigerant leak, a problem with the compressor, or an issue with the thermostat or control board. Symptoms may include the system cycling on and off repeatedly, poor airflow, or the unit not producing cool air.
Some potential solutions include checking the air filters and cleaning or replacing them if needed, ensuring the outdoor unit is free of debris, and checking the thermostat settings. However, if the issue persists, it's best to call in a professional HVAC technician to diagnose and repair the problem, as ductless systems require specialized knowledge and tools.