That depends on how big your system is and if you want the heated or cooled air to enter the other rooms. If there are entry/exit doors to the outside of the house, then these should be closed, along with windows, when the split system is operating.
Serial signal reverse error code. Model ASTA09LCC. Unit was installed and ran for approx. 2 hours...
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Serial signal reverse error code. Model ASTA09LCC. Unit was installed and ran for approx. 2 hours before failing