Function Details SiBE28101338 Function and Control3.2.10 Night-time Quiet OperationA. Setting by Remote ControllerNight-time quiet operation can be set by field setting from the wired remote controller.By estimating current time based on the change of outdoor air temperature, the low noiseoperation is automatically performed at night (from 22:00 to 8:00) by limiting the number ofrevolutions of outdoor unit fan and the operation frequency of the compressor. (The time atnight is target.)B. Setting by Demand Operation (Option)Short circuit between COM-LNOP on terminal of demand adaptor.Low sound running to be done with limited outdoor fan speed compressor runningfrequency.Note: In the case of capacity priority settingSetting the "Capacity priority setting" from the field setting mode of indoor remote controller, thecapacity is prioritized in the operations of both A and B, and when the air conditioning loadbecomes high, the low noise operation stops and the normal operation starts.If you cancel the capacity priority setting when the low noise setting remains, the low noisesetting is prioritized, and even if air conditioning load becomes high, the noise operationcontinues.3.2.11 Low Pressure Protection ControlIn order to prevent abnormal low pressures in the system, the below control function will beactivated.Lp < 0.12 MPa &(Cooling) (Heating)& • Lp > 0.15 MPa• 30 sec elapsed• &• OR• Lp < 0.12 MPaNormal operationCompressor upper limit frequencyRZQG71LV1B: 57 HzRZQG100-140LV1B: 30 HzCompressor upper limit frequencyRZQG71LV1B: 57 HzRZQG100-140LV1B: 30 Hz10 times or lessstopping in 200 minutes• Lp < 0.12 MPa continuesfor 5 minutes• Lp < 0.12 MPa continuesfor 1 minute• Lp < 0.12 MPa continuesfor 10 seconds • Lp > 0.15 MPa continuesfor 10 seconds elapsed• Lp > 0.15 MPa continuesfor 1 minute• From the starting towithin 5 minutes afterthe startup control stops• Within 10 minutes afterdefrostingCompressor stop: 0 HzAbnormal stop (E4 indication)Stopped 11 times in 200 minutesCondition E* : OR• 5 minutes after starting• Lp > 0.15 MPa continues for 1 minuteCondition ECondition ECondition ELp > 0.15 MPaCompressor upper limit frequency10 stepsCompressor upper limit frequency20 stepsNormal operation• 10 minutes elapsed afterdefrosting
