SiBE121135_A Control SpecificationFunction and Control 1244.12.1 Fully Closing with Power onThe outdoor electronic expansion valve is initialized when the power is turned on. The openingposition is set and the pressure equalization is developed.4.12.2 Pressure Equalizing ControlWhen the compressor is stopped, the pressure equalizing control is activated. The outdoorelectronic expansion valve opens, and develops the pressure equalization.4.12.3 Opening Limit ControlOutline A maximum and minimum opening of the outdoor electronic expansion valve are limited.Detail A maximum outdoor electronic expansion valve opening in the operating room: 450 pulses A minimum outdoor electronic expansion valve opening in the operating room: 75 pulsesThe outdoor electronic expansion valve is fully closed in the room where cooling is stopped andis opened at a fixed degree during defrosting.4.12.4 Starting Operation Control / Changing Operation RoomThe outdoor electronic expansion valve opening is controlled when the operation starts, andprevents superheating or liquid compression.4.12.5 Control when the Frequency ChangesWhen the target discharge pipe temperature control is active, if the target frequency is changedto a specified value in a certain time period, the target discharge pipe temperature control iscanceled and the target opening of the outdoor electronic expansion valve is changed.4.12.6 Oil Recovery FunctionOutline The outdoor electronic expansion valve opening in the cooling stopped room is set as to openfor a certain time at a specified interval so that the oil in the cooling stopped room may not beaccumulated.Detail During cooling operation, every 1 hour continuous operation, the outdoor electronic expansionvalves in the operation stopped room is opened by 80 pulses for specified time.4.12.7 High Discharge Pipe Temperature ControlWhen the compressor is operating, if the discharge pipe temperature exceeds a certain value,the outdoor electronic expansion valve opens and the refrigerant runs to the low pressure side.This procedure lowers the discharge pipe temperature.
