See also:

Airflow selection
Airflow selection ...

Lubrication oil circulation in the refrigerant circuit
Operate the air conditioner compressor at a low engine speed (at idle or low driving speeds) a few minutes each month during the off-season to circulate its oil. ...

Setting guidance volume
To set the guidance volume, perform the following procedure. 1. Select the “GUIDANCE VOL”/“GUIDANCE VOLUME” menu. 2. Set the guidance volume by operating the “TUNE/TRACK/CH” dial. ...