Protection Control SiBE28-80550 Function4.4 Inverter Protection ControlInverter current protection control and inverter fin temperature control are performed to preventtripping due to a malfunction, or transient inverter overcurrent, and fin temperature increase.★ In the case of multi-outdoor-unit system, each INV compressor performs these controls inthe following sequence.[Inverter overcurrent protection control][Inverter fin temperature control]Nomal operationUnder inverter currentprotection controlInvertercurrent >14.7AInverter current standbyInverter current <14.7AINV upper limit frequency = maxINV upper limit frequency: 1-step downfrom current compressor frequencyINV upper limit frequency: 1-step up fromcurrent compressor frequencyInverter current >14.7AInverter current<14.7A continuesfor 20 sec. or more.Inverter current > 16.1A continues for 260 sec.&• When occurring 4 times within 60 min.,the malfunction code “L8 ” is output.Tfin>84˚CFin temp. standbyTfin<81˚CINV upper limit rps = maxUnder fin temperatureprotection control INV upper limit frequency: 1-step / 1 min upfrom current compressor frequency IntervalInverter fin temp.<81˚C continuesfor 3 min. or more.&Tfin>84˚CTfin>93˚C• When occurring 4 times within 60 min.,the malfunction code “L4” is output.Nomal operationINV upper limit frequency: 1-step /1 min down from current compressorrps
