LED display on indoor unit shows error codes. Cover on indoor unit removes easily for access to components and service ports on outdoor units are conveniently located. Mini-splits are inherently quiet because the compressor’s operation sound is kept outside, and the indoor unit is built with a high-tech fan that delivers balanced airflow for whisper quiet operation. Inverter technology of the V Series is exceptionally quiet, because the dc compressor runs mostly at low rpms, which minimizes any noise or vibration.

Source: ACHR News (a part of news report)

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