This model utilizes an interface control board with two-digit LED to provide system operation, status, and diagnostic troubleshooting information, as well as a patented capacity control algorithm to select the optimum system capacity level. Internal controls monitor system operation to protect the inverter drive and compressor. Adaptive demand defrost provides additional energy savings in heating by defrosting only when necessary. Five-minute restart time delay when the unit shuts down protects the system. Compressor sound blanket and discharge muffler engineered to significantly reduce unwanted compressor noise. The unit features a variable-speed condenser motor and a heavy duty brushless dc motor for long lasting reliability, and swept-wing fan blade engineered to provide quiet operation.

Source: ACHR News (a part of news report)

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