Control Specification
SiMT041311E
55
Function and Control
2.11.1 Fully Closing with Power ON
The electronic expansion valve is initialised when turning on the power. The opening position is
set and the pressure is equalised.
2.11.2 Pressure Equalising Control
When the compressor is stopped, the pressure equalising control is activated. The electronic
expansion valve opens, and develops the pressure equalisation.
2.11.3 Opening Limit Control
The maximum and minimum opening of the electronic expansion valve are limited.
The electronic expansion valve is fully closed when cooling operation stops, and is opened at a
fixed degree during defrosting.
2.11.4 Starting Operation Control
The electronic expansion valve opening is controlled when the operation starts, and preventing
superheating or liquid compression.
2.11.5 Control when the Frequency Changes
When the target discharge pipe temperature control is active, if the target frequency changes to
a specified value in a certain time period, the target discharge pipe temperature control is
cancelled and the target opening of the electronic expansion valve is changed according to the
frequency shift.
2.11.6 High Discharge Pipe Temperature Control
When the compressor is operating, if the discharge pipe temperature exceeds a certain value,
the electronic expansion valve opens and the refrigerant runs to the low pressure side. This
procedure lowers the discharge pipe temperature.
Maximum opening (pulse)
470
Minimum opening (pulse)
10