Many of the non-inverter units have a "low noise" mode that runs both the indoor and outdoor unit fans slower. This is sometimes used in "economy mode" as well. In low noise mode, the compressor usually runs full out on demand, but in economy mode, it runs for some amount of time before timing out for a few minutes and then restarting. Some of the stuff has a setpoint profile built in as well, where the moving parts cycle depending on fuzzy logic.
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