Special Control
SiUS39-602
50
Function
3.2
Oil Return Operation
In order to prevent the running-out of refrigerating machine oil in the compressor, the oil flowing
out from the compressor to the system side is collected through the oil return operation.
3.2.1 Oil Return Operation in Cooling Operation
[Starting conditions]
Start oil return operation in cooling operation referring to the following conditions.
* Cumulative oil return amount
* Timer
Cumulative compressor operating time after power supply turns on exceeds 2 hours and the
time after the completion of previous oil return operation exceeds 8 hours.
Furthermore, the cumulative oil return is calculated according to Tc, Te, and compressor load.
Actuator
Oil return preparation
operation
Oil return operation
Post-oil-return operation
Compressor
Upper limit control
124 Hz + ON
52 Hz + OFF
Outdoor unit fan
Fan control
Fan control
Fan control
Four way valve 1
OFF
OFF
OFF
Four way valve 2
OFF
OFF
OFF
Main motorized valve (EV1)
1400 pls
1400 pls
1400 pls
Sub motorized valve (EV2)
1400 pls
1400 pls
1400 pls
Sub-cooling motorized valve (EV3)
SH control
0 pls
0 pls
Hot gas bypass valve (SVP)
OFF
ON
ON
Oil equalization valve (SVO)
ON
ON
ON
Receiver gas charging valve (SVL)
OFF
OFF
OFF
Receiver gas discharge valve (SVG)
OFF
OFF
OFF
Discharge pipe stop valve (SVR)
OFF
OFF
OFF
Non-operating unit liquid pipe stop
valve (SVSL)
OFF
OFF
OFF
High pressure gas pipe pressure
reduction valve (SVC)
ON
ON
ON
Ending conditions
1 min.
•
6 min.
•
Ts - Te<9
30 sec.
or
Indoor unit actuator
Cooling oil return operation
Fan
Thermostat ON unit
Set Air Volume
Stopping unit
OFF
Thermostat OFF unit
OFF
Electronic expansion valve
Thermostat ON unit
Normal opening
Stopping unit
200 pls
Thermostat OFF unit
200 pls
Содержание REYQ72
Страница 35: ...Specifications SiUS39 602 24 Specifications...
Страница 121: ...Field Setting SiUS39 602 110 Test Operation...
Страница 129: ...Troubleshooting by Remote Controller SiUS39 602 118 Troubleshooting...
Страница 225: ...Troubleshooting OP Unified ON OFF Controller SiUS39 602 214 Troubleshooting...
Страница 229: ...Piping Diagrams SiUS39 602 218 Appendix 1 Piping Diagrams 1 1 Outdoor Unit REYQ72M 96MTJU 4D045329A...
Страница 232: ...SiUS39 602 Piping Diagrams Appendix 221 1 3 BS Unit BSVQ36MVJU BSVQ60MVJU 4D045338...
Страница 234: ...SiUS39 602 Wiring Diagrams for Reference Appendix 223 2 2 Field Wiring REYQ72 96MTJU C 3D050361A...
Страница 235: ...Wiring Diagrams for Reference SiUS39 602 224 Appendix REYQ144 168 192MTJU C 3D050354A...
Страница 238: ...SiUS39 602 Wiring Diagrams for Reference Appendix 227 FXAQ07M 09M 12M 18M 24MVJU FXHQ12M 24M 36M 3D046039C 3D048116...
Страница 239: ...Wiring Diagrams for Reference SiUS39 602 228 Appendix FXLQ12M 18M 24MVJU FXNQ12M 18M 24MVJU 3D045644A...
Страница 240: ...SiUS39 602 Wiring Diagrams for Reference Appendix 229 2 4 BS Unit BSVQ36M 60MVJU 3D045069A...
Страница 249: ...Example of Connection R 410A Type SiUS39 602 238 Appendix...
Страница 255: ...Method of Replacing The Inverter s Power Transistors and Diode Modules SiUS39 602 244 Appendix...
Страница 265: ...Precautions for New Refrigerant R 410A SiUS39 602 254 Precautions for New Refrigerant R 410A...
Страница 269: ...SiUS39 602 iv Index...