SiBE34-802 Field SettingTest Operation 1153.2.3 Setting of Low Noise Operation and Demand OperationSetting of Low Noise OperationBy connecting the external contact input to the low noise input of the outdoor unit externalcontrol adaptor (optional), you can lower operating noise by 2-3 dB.When the low noise operation is carried out automatically at night (The external controladaptor for outdoor unit is not required)1. While in "Setting mode 2", select the setting condition (i.e., "Mode 1", "Mode 2", or "Mode 3")for set item No. 22 (Setting of nighttime low noise level).2. If necessary, while in "Setting mode 2", select the setting condition (i.e., "20:00", "22:00", or"24:00") for set item No. 26 (Setting of start time of nighttime low noise operation).(Use the start time as a guide since it is estimated according to outdoor temperatures.)3. If necessary, while in "Setting mode 2", select the setting condition (i.e., "06:00", "07:00", or"08:00") for set item No. 27 (Setting of end time of nighttime low noise operation).(Use the end time as a guide since it is estimated according to outdoor temperatures.)4. If necessary, while in "Setting mode 2", set the setting condition for set item No. 29 (Settingof capacity precedence) to "ON".(If the condition is set to "ON", when the air-conditioning load reaches a high level, thesystem will be put into normal operation mode even during nighttime.)Image of operation
