Si39-306
Other Control
Function
85
5.
Other Control
5.1
Outdoor Unit Rotation
In the case of multi-outdoor-unit system, this outdoor unit rotation is used to prevent the
compressor from burning out due to unbalanced oil level between outdoor units.
[Details of outdoor unit rotation]
In the case of multi-outdoor-unit system, each outdoor unit is given an operating priority for the
control.
Outdoor unit rotation makes it possible to change the operating priority of outdoor units.
Thus, the system becomes free of compressors that stop over an extended period of time at the
time of partial loading, preventing unbalanced oil level.
[Timing of outdoor unit rotation]
After oil return operation
After defrosting operation
At the beginning of the starting control
Example) The following diagram shows outdoor unit rotation in combination of 3 outdoor units.
*
“Master unit”, “slave unit 1” and “slave unit 2” in this section are the names for installation.
They are determined in installation work, and not changed thereafter. (These names are
different from “master unit” and “slave unit” for control.)
The outdoor unit connected the control wires (F1 and F2) for the indoor unit should be
designated as master unit
Consequently, The LED display on the main PCB for “master unit”, “slave unit 1” and “slave
unit 2” do not change. (Refer to the page 87.)
or
Normal operation
Starting
control
Outdoor unit
rotation
Oil return operation
or defrosting
operation
Priority
1
Priority
2
Priority
3
Outdoor unit
rotation
Priority
3
Priority
1
Priority
2
Normal operation
Normal operation
Oil return operation
or defrosting
operation
Outdoor unit
rotation
Priority
2
Priority
3
Priority
1
Normal operation
Priority
3
Priority
1
Priority
2
Master Slave 1 Slave 2
Master Slave 1 Slave 2
Master Slave 1 Slave 2
Master Slave 1 Slave 2
Summary of Contents for VRV II REYQ10MY1B
Page 19: ...Model Selection Si39 306 8 General Information ...
Page 150: ...Si39 306 Troubleshooting by Remote Controller Troubleshooting 139 ...
Page 250: ...Si39 306 Piping Diagrams Appendix 239 REYQ14MY1B REYQ16MY1B 4D042070A ...
Page 252: ...Si39 306 Piping Diagrams Appendix 241 1 3 BS Unit BSVQ100MV1 BSVQ160MV1 BSVQ250MV1 4D042115 ...
Page 254: ...Si39 306 Wiring Diagrams for Reference Appendix 243 REYQ14MY1B REYQ16MY1B 3D038572 ...
Page 256: ...Si39 306 Wiring Diagrams for Reference Appendix 245 REYQ18 20 22 24 26 28 30 32MY1B 3D043436 ...
Page 257: ...Wiring Diagrams for Reference Si39 306 246 Appendix REYQ34 36 38 40 42 44 46 48MY1B 3D043437 ...
Page 259: ...Wiring Diagrams for Reference Si39 306 248 Appendix FXCQ40M 50M 80M 125MVE 3D039557A ...
Page 260: ...Si39 306 Wiring Diagrams for Reference Appendix 249 FXZQ20M 25M 32M 40M 50MVE 3D038359 ...
Page 262: ...Si39 306 Wiring Diagrams for Reference Appendix 251 FXKQ25M 32M 40M 63MVE 3D039564A ...
Page 264: ...Si39 306 Wiring Diagrams for Reference Appendix 253 FXMQ40M 50M 63M 80M 100M 125MVE 3D039620A ...
Page 265: ...Wiring Diagrams for Reference Si39 306 254 Appendix FXMQ200M 250MVE 3D039621A ...
Page 266: ...Si39 306 Wiring Diagrams for Reference Appendix 255 FXHQ32M 63M 100MVE 3D039801C ...
Page 267: ...Wiring Diagrams for Reference Si39 306 256 Appendix FXAQ20M 25M 32MVE 40M 50M 63MVE 3D034206A ...
Page 283: ...REFNET Pipe System Si39 306 272 Appendix ...
Page 284: ...Si39 306 Appendix 273 DPSOH RI RQQHFWLRQ 5 7 SH 5 4 0 HDW 5HFRYHU ...
Page 285: ...Si39 306 274 Appendix ...
Page 291: ...Method of Replacing The Inverter s Power Transistors and Diode Modules Si39 306 280 Appendix ...
Page 305: ...Si39 306 iv Index ...