SiUS371901EB
Special Control
Part 4 Functions and Control
156
While in all-room cooling operation
→
All-room cooling/heating simultaneous operation
While in all-room heating operation or cooling/heating simultaneous operation
→
All-room cooling
(1) All the indoor units in cooling operation
Using the dual pressure gas pipe as a suction gas
pipe.
(2) Pump-down residual operation
(3) Pre-startup control
Switching between the electronic expansion
valves of branch selector unit.
Required switching time: 30 seconds (switching
control time)
(While switching: The compressor stops operating.)
(4) Startup control
Switching the dual pressure gas pipe from low
pressure to high pressure.
(5) Into heating operation or cooling and heating
simultaneous operation
Each indoor unit
In warm air supply operation under cool air
prevention control (for 3 to 5 minutes).
(1)
In heating operation or cooling and heating
simultaneous operation
Using the dual pressure gas pipe as a suction
gas pipe.
(2)
Pump-down residual operation
(3)
Pre-startup control
Switching between the electronic expansion
valves of branch selector unit.
Required switching time: 2 to 4 minutes
(switching control time)
(While switching: The compressor stops
operating.)
(4)
Startup control
Switching the dual pressure gas pipe from low
pressure to high pressure.
(5)
Into all-unit cooling operation
In cool air supply operation
Suction gas pipe
Dual pressure gas pipe
Cooling
Cooling
Cooling
Cooling
Cooling
Suction gas pipe
Dual pressure gas pipe
Heating
Heating
Heating
Heating
(1)
(2)
(3)
(4)
(5)
(1)
(2)
(3)
(4)
(5)
(1)
(2)
(3)
(4)
(5)
Heating
Liquid
pipe
Liquid
pipe
Suction gas pipe
Dual pressure gas pipe
Liquid
pipe
Suction gas pipe
Dual pressure gas pipe
Heating
Heating
Heating
Heating
Heating
Suction gas pipe
Dual pressure gas pipe
Vent
Vent
Vent
Vent
Vent
Cooling
Cooling
Cooling
Cooling
Suction gas pipe
Dual pressure gas pipe
Cooling
(1)
(2)
(3)
(4)
(5)
(1)
(2)
(3)
(4)
(5)
(1)
(2)
(3)
(4)
(5)
Liquid
pipe
Liquid
pipe
Liquid
pipe
Summary of Contents for REYQ72-432XAYCU
Page 455: ...SiUS371901EB Wiring Diagrams Part 7 Appendix 448 REYQ144 168XATJU REYQ144 168XATJA 2D119206B ...
Page 457: ...SiUS371901EB Wiring Diagrams Part 7 Appendix 450 REYQ144 168XAYDU REYQ144 168XAYDA 2D119208C ...
Page 461: ...SiUS371901EB Wiring Diagrams Part 7 Appendix 454 FXZQ05 07 09 12 15 18TAVJU 3D110443A ...
Page 463: ...SiUS371901EB Wiring Diagrams Part 7 Appendix 456 FXEQ07 09 12 15 18 24PVJU 3D098557A ...
Page 464: ...Wiring Diagrams SiUS371901EB 457 Part 7 Appendix FXDQ07 09 12 18 24MVJU C 3D050501C ...
Page 468: ...Wiring Diagrams SiUS371901EB 461 Part 7 Appendix FXHQ12 24 36MVJU 3D048116C ...
Page 469: ...SiUS371901EB Wiring Diagrams Part 7 Appendix 462 FXAQ07 09 12 18 24PVJU 3D075354F ...
Page 475: ...SiUS371901EB Wiring Diagrams Part 7 Appendix 468 VAM1200GVJU 3D073270D ...
Page 478: ...Wiring Diagrams SiUS371901EB 471 Part 7 Appendix BS6 8Q54TVJ 2D089122B ...
Page 479: ...SiUS371901EB Wiring Diagrams Part 7 Appendix 472 BS10 12Q54TVJ 2D089121B ...
Page 481: ...SiUS371901EB Wiring Diagrams Part 7 Appendix 474 BSF6 8Q54TVJ 2D123905A ...