Record what is actually cycling
For a day or two, note the outdoor temperature, thermostat setting, room temperature, and approximate start and stop times. Distinguish the indoor fan from the outdoor compressor. A fan running does not necessarily mean the compressor is cooling.
Note whether the system holds the desired temperature, leaves rooms uncomfortable, or repeatedly stops before reaching the setting. Avoid testing with constant thermostat changes. That makes the pattern harder to interpret.
Short runs can occur when the home needs little cooling. Repeated brief cycling can also relate to sizing or control problems. Trane's guidance includes both conditions, so a single universal minimum run time would be a poor way to judge your system. Trane AC cycling guidance.
Verify the installation before changing settings
Ask for full outdoor-unit, indoor-unit, and thermostat model numbers. Have the installer confirm the approved control interface and whether the thermostat supports the system's intended modulation. “It is a smart thermostat” does not answer compatibility.
Ask what sizing calculation supported the equipment choice, what airflow was measured at startup, and how the installer verified operation at the available output levels. If a control setting needs correction, the technician should explain why it fits the manufacturer's instructions. Do not enter installer menus or change wiring to force longer operation.
A system that is oversized for the home's load, meaning the amount of cooling the home needs, presents a different decision from one with a control fault. The measurements should distinguish them.
Ask the installer to observe the reported pattern and put the expected behavior and findings in writing. If mild-weather cycling is appropriate, that explanation should fit your comfort and temperature records. If the equipment or controls are wrong, request a specific correction and a test that shows the original complaint has been resolved.