Control Specification SiBE04-70548 Function and Control3.5 Input Current ControlOutline The microcomputer calculates the input current during the compressor is running, and set thefrequency upper limit from such input current.In case of heat pump model, this control is the upper limit control function of the frequencywhich takes priority of the lower limit of four way valve activating compensation.DetailFrequency control in each zoneDrooping zone The maximum limit of the compressor frequency in this control is defined as operationfrequency – 2Hz. After this, the output frequency is pulled down by 2Hz every second until it reaches thesteady zone.Keep zone The present maximum frequency goes on.Reset zone Limit of the frequency is cancelled.Stop zone After 2.5 s in this zone, the compressor is stopped.+FTK(X)S50D and ATXS50E only have ECONO mode.Limitation of current drooping and stop value according to the outdoor air temperature1. In case the operation mode is cooling The current droops when outdoor air temperature becomes higher than a certain level(model by model).2. In case the operation mode is heating (only for heat pump model) The current droops when outdoor air temperature becomes higher than a certain level(model by model).Compressor StopDrooping ZoneStop ZoneKeep ZoneReset ZoneI4I3I3 –Iα(R4304)Cooling Heating50 class 60 class 71 class 50 class 60 class 71 classI4 (A) 20 2010.0 15.0I3 (A)7.0 10.59.0 14.0I3-Iα (A)6.012.0–11.0–15.75–14.75–16.0–15.0–17.5–16.5–9.5Normal modeNormal modeECONO modeECONO mode
