SiBE34-802 Protection ControlFunction 614.2 Low Pressure Protection ControlThis low pressure protection control is used to protect compressors against the transientdecrease of low pressure.[In cooling operation][In heating operation]Pe<0.25MPa36Hz UnloadPe>0.39MPaPe<0.07MPaLow pressure not limitedLow pressurestandbyLow pressurelimitedPe: LP pressure sensor detectionvalueWhen occurring 3 times within 30 min.,the malfunction code "E4" is output.Pe<0.15MPa Pe>0.30MPaHot gas SVP = OFFHot gas SVP = ON&• Ts-Teg <8deg• Pe >0.06MPa• Pe >0.09MPaorAfter 10 sec.Pe<0.17MPaPe<0.17MPaPe >0.20MPaPe< 0.07MPaCurrent step limitedAfter 15 sec.Low pressure not limitedLow pressure limitedINV upper limit frequency :1-step up from currentcompressor frequencyPe: LP pressure sensor detectionvalueINV upper limit frequency :3-step down from currentcompressor frequencyWhen occurring 3 times within 30 min.,the malfunction code "E4" is output.Low pressurestandbyPe<0.12MPa Pe>0.17MPaHot gas SVP = OFFHot gas SVP = ON
