SiUS04-702 Control Specification (09/12 Class)Function and Control 393.5 Input Current ControlOutline Detect an input current by the CT during the compressor is running, and set the frequency upperlimit 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.Detail The frequency control will be made within the following zones.When a “stop current” continues for 2.5 seconds after rushing on the stop zone, the compressoroperation stops.If a “drooping current” is continues for 1.0 second after rushing on the drooping zone, the frequencywill be 2 Hz drooping.Repeating the above drooping continues until the current rushes on the drooping zone withoutchange.In the keep zone, the frequency limit will remain.In the return / reset zone, the frequency limit will be cancelled.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 (modelby model).2. In case the operation mode is heating The current droops when outdoor air temperature becomes higher than a certain level (modelby model).3.6 Freeze-up Protection ControlOutline During cooling operation, the signals being sent from the indoor unit allow the operating frequencylimitation and then prevent freezing of the indoor heat exchanger. (The signal from the indoor unitmust be divided into the zones as the followings.)Detail Conditions for Start ControllingJudge the controlling start with the indoor heat exchanger temperature after 2 sec from operationstart.Control in Each Zone
