Protection Control Si34-60360 Function4. Protection Control4.1 High Pressure Protection ControlThis high pressure protection control is used to prevent the activation of protection devices dueto abnormal increase of high pressure and to protect compressors against the transientincrease of high pressure.[In cooling operation][In heating operation]Pc >3.47MPaAfter 10 sec.Pc> 3.47MPaPc < 3.23MPaPc>3.64MPaKeeping the current stepAfter 15 sec.High pressure not limitedHigh pressure limitedINV upper limit frequency :1-step up from currentcompressor frequencyPc: HP pressure sensor detection valueINV upper limit frequency :3-step down from currentcompressor frequencyWhen occurring 10 times within 60minutes, HPS is activated without highpressure standby, thus outputting themalfunction code "E3".High pressurestandbyINV upper limit frequency=MaxHigh-pressure dropPc >3.04MPaAfter 10 sec.Pc>3.04MPaPc <2.94MPaPc>3.64MPaKeeping the current stepAfter 60 sec.High pressure not limitedHigh pressure limitedINV upper limit frequency :1-step up from currentcompressor frequencyPc: HP pressure sensor detection valueINV upper limit frequency :1-step down from currentcompressor frequencyWhen occurring 10 times within 60minutes, HPS is activated without highpressure standby, thus outputting themalfunction code "E3".High pressurestandbyPc <2.89MPa
