SiUS091601EA
Control Specification
Part 4 Functions and Control
88
5.11.1 Initialization as Power Supply On
The electronic expansion valve is initialized (fully closed) when the power is turned on. Then, the
valve opening position is set and the pressure is equalized.
5.11.2 Pressure Equalizing Control
When the compressor is stopped, the pressure equalizing control is activated. The electronic
expansion valve opens, and develops the pressure equalization.
5.11.3 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.
5.11.4 Starting Operation Control
The electronic expansion valve opening is controlled when the operation starts, thus preventing
superheating or liquid compression.
5.11.5 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 canceled
and the target opening of the electronic expansion valve is changed according to the frequency
shift.
5.11.6 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.
09/12 class
15 class
18/24 class
Maximum opening (pulse)
470
480
490
Minimum opening (pulse)
32
52
52
Summary of Contents for FDMQ12RVJU
Page 18: ...SiUS091601EA 13 Part 2 Specifications 1 Specifications 14 Part 2 Specifications ...
Page 198: ...Check SiUS091601EA 193 Part 6 Service Diagnosis 18 24 class R24538 1 2 3 4 Multimeter ...
Page 201: ...SiUS091601EA Check Part 6 Service Diagnosis 196 18 24 class R24539 DC DC W V U ...
Page 229: ...SiUS091601EA Piping Diagrams Part 8 Appendix 224 RXL15QMVJU RXL18UMVJU 3D100007 3D123368 ...
Page 230: ...Piping Diagrams SiUS091601EA 225 Part 8 Appendix RXL24UMVJU 3D107985A ...