Control Specification SiUS04-924Function and Control 333.5 Input Current ControlOutline The microcomputer calculates the input current while the compressor is running, and sets thefrequency upper limit from such input current.In case of heat pump model, this control is the upper limit control function of the frequency whichtakes priority of the lower limit of four-way valve activating compensation.DetailFrequency control in each zoneDropping 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 the steadyzone.Keep zone The present maximum frequency goes on.Reset zone Limit of the frequency is cancelled.Stop zone After 2.5 seconds in this zone, the compressor is stopped.Limitation of current dropping and stop value according to the outdoor air temperature1. In case the operation mode is cooling The current drops when outdoor air temperature becomes higher than a certain level (model bymodel).2. In case the operation mode is heating The current drops when outdoor air temperature becomes higher than a certain level (model bymodel).Cooling HeatingI4 (A) 20 20I3 (A) 19 19I3-I (A) 18 18Compressor StopDropping ZoneStop ZoneKeep ZoneReset ZoneI4I3I3 –Ia(R4304)
