Si39-504
Other Control
Function
91
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
• When any of compressors stops for a period of 20 minutes or more
(in heating operation)
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 main unit.
Consequently, The LED display on the main PC board for “master unit”, “slave unit 1” and
“slave unit 2” do not change. (Refer to the page 93.)
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
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
Any of
compressors stops
for a period of 20
minutes or more.
Summary of Contents for VRV II RXYQ5MATL
Page 53: ...Specifications Si39 504 42 Specifications...
Page 115: ...Outline of Control Indoor Unit Si39 504 104 Function...
Page 161: ...Field Setting Si39 504 150 Test Operation...
Page 172: ...Si39 504 Troubleshooting by Remote Controller Troubleshooting 161...
Page 266: ...Si39 504 Piping Diagrams Appendix 255 RXYQ8MA 10MA 12MAYL E TL E 3D048033A...
Page 267: ...Piping Diagrams Si39 504 256 Appendix RXYQ14MA 16MAYL E TL E 3D048034A...
Page 271: ...Wiring Diagrams for Reference Si39 504 260 Appendix RXYQ8MA 10MA 12MAYL E 3D047088C...
Page 272: ...Si39 504 Wiring Diagrams for Reference Appendix 261 RXYQ14MA 16MAYL E 3D047089C...
Page 273: ...Wiring Diagrams for Reference Si39 504 262 Appendix 2 1 2 RXYQ MATL E RXYQ5MATL E 3D049059A...
Page 274: ...Si39 504 Wiring Diagrams for Reference Appendix 263 RXYQ8MA 10MA 12MATL E 3D049060A...
Page 275: ...Wiring Diagrams for Reference Si39 504 264 Appendix RXYQ14MA 16MATL E 3D049061A...
Page 283: ...Wiring Diagrams for Reference Si39 504 272 Appendix FXCQ40M 50M 80M 125MVE 3D039557A...
Page 285: ...Wiring Diagrams for Reference Si39 504 274 Appendix FXKQ25M 32M 40M 63MVE 3D039564B...
Page 289: ...Wiring Diagrams for Reference Si39 504 278 Appendix FXMQ40M 50M 63M 80M 100M 125MVE 3D039620B...
Page 290: ...Si39 504 Wiring Diagrams for Reference Appendix 279 FXMQ200M 250MVE 3D039621B...
Page 291: ...Wiring Diagrams for Reference Si39 504 280 Appendix FXHQ32M 63M 100MVE 3D039801D...
Page 292: ...Si39 504 Wiring Diagrams for Reference Appendix 281 FXAQ20M 25M 32MVE 40M 50M 63MVE 3D034206C...
Page 309: ...Selection of Pipe Size Joints and Header Si39 504 298 Appendix Note 1...
Page 315: ...Method of Replacing The Inverter s Power Transistors and Diode Modules Si39 504 304 Appendix...
