Function Details SiME281501E37 Function and Control4.2.10 Low Pressure Protection ControlIn order to prevent abnormal low pressures in the system, the below control function will be activated. Lowpressure is detected by the low pressure sensor. RZQ20/24LVALp < 0.12MPaNormal operation&(When cooling operation) (When heating operation)Compressor stop: 0 Hz10 secondsCondition A∗Condition A∗Stopped 11 times in 200 minutes• After 5 minutes after starting• After 10 minutes after defrosting∗ Condition A: & • OR• Lp > 0.15 MPa for 1 minute• OR• L p < 0.12MPaCondition A∗Lp < 0.12MPa forLp > 0.15MPaLp < 0.12MPa for5 minutesAbnormal stop (E4 indication)Normal operationLp > 0.15MPa for30 secondsCompressor upper limitfrequency57 Hz10 times or lessstopping in 200 minutesCompressor upperlimit frequency57 HzLp > 0.15MPa for10 secondsLp < 0.12MPa for1 minuteCompressor upperlimit frequency10 stepsLp > 0.15MPa for1 minute• Within 10 minutesafter defrosting• LPS activatescontinuous for 5minutes.Compressor upperlimit frequency20 steps
