Special Control
SiUS39-601
42
Function
3.2.2 Oil Return Operation in Heating Operation
<In condition of oil return operation>
Compressor cumulative operation time > 8 hours
(However, 2 hours after turning power on first time.)
Outdoor Unit Actuator
Oil return preparation
operation
Oil return operation
Post-oil-return operation
Compressor
Upper limit control
124 Hz + ON
1-step increase from
(74 Hz + OFF) to
(Pc - Pe>58 psi) time
Outdoor unit fan
STEP8
or
STEP9
OFF
STEP9
Four way valve
ON
OFF
ON
Main motorized valve (EV1)
SH control
0 pls
180 pls
Subcooling motorized valve (EV2)
0 pls
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 discharging valve (SVG) OFF
OFF
OFF
Non-operating unit gas discharging
valve (SVSG)
OFF
OFF
OFF
Non-operating unit liquid pipe stop
valve (SVSL)
ON
ON
ON
Ending conditions
2 min.
•
6 min.
•
Ts - Te<9
•
160 sec.
•
Pc - Pe>58 psi
or
or
Indoor unit actuator
Heating oil return operation
Fan
Thermostat ON unit
OFF
Stopping unit
OFF
Thermostat OFF unit
OFF
Electronic expansion valve
Thermostat ON unit
512 pls
Stopping unit
512 pls
Thermostat OFF unit
512 pls
Summary of Contents for RXYQ72
Page 115: ...Field Setting SiUS39 601 104 Test Operation...
Page 227: ...Troubleshooting OP Unified ON OFF Controller SiUS39 601 216 Troubleshooting...
Page 231: ...Piping Diagrams SiUS39 601 220 Appendix 1 Piping Diagrams 1 1 Outdoor Unit RXYQ72M 96M...
Page 236: ...SiUS39 601 Wiring Diagrams for Reference Appendix 225 RXYQ144 168 192MTJU C 3D050353A...
Page 249: ...Example of Connection SiUS39 601 238 Appendix...
Page 255: ...Method of Replacing The Inverter s Power Transistors and Diode Modules SiUS39 601 244 Appendix...
Page 265: ...Precautions for New Refrigerant R 410A SiUS39 601 254 Precautions for New Refrigerant R 410A...
Page 269: ...SiUS39 601 iv Index...
