SiUS041111 Control SpecificationFunction and Control 453.11 Electronic Expansion Valve ControlOutline The following items are included in the electronic expansion valve control.Electronic expansion valve is fully closed1. Electronic expansion valve is fully closed when turning on the power.2. Pressure equalizing controlOpen Control1. Electronic expansion valve control when starting operation2. Electronic expansion valve control when the frequency changes3. Electronic expansion valve control for defrosting4. Electronic expansion valve control when the discharge pipe temperature is abnormally high5. Electronic expansion valve control when the discharge pipe thermistor is disconnectedFeedback Control1. Target discharge pipe temperature controlDetail The followings are the examples of control which function in each mode by the electronic expansionvalve control.h: function− : not functionCoolinghhhh hhhh h hhhh hh h h hh hhhh hhh h hhHeating(R14458)–– ––– – –––– ––– ––– –––– – –– – –– – –– – –––––––––– ––h––h h h h– – – –– – – ––––h––– ––––– – – –––– – – –– – –– – –– – ––– – –Starting controlControl when the frequency changesTarget discharge pipe temperature controlControl for disconnection of the dischargepipe thermistorHigh discharge pipe temperature controlPressure equalizing controlOpening limit controlStarting controlControl when the frequency changesTarget discharge pipe temperature controlControl for disconnection of the dischargepipe thermistorHigh discharge pipe temperature controlDefrost controlPressure equalizing controlOpening limit controlWhen the power turns on or when thecompressor stopsWhen the operation startsWhen the frequency changes under startingcontrolDuring target discharge pipe temperaturecontrolWhen the frequency changes under targetdischarge pipe temperature controlWhen the disconnection of the dischargepipe thermistor is ascertainedWhen the frequency changes under the control fordisconnection of the discharge pipe thermistorUnder defrost control
