SiBE341001
Detailed Control Functions
Function
56
2.7.4 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]
• At the beginning of the starting control
• When any of outdoor unit stops for a period of 20 minutes or more (in heating)
Example) The following diagram shows outdoor unit rotation in combination of 3 outdoor units. (in heating)
*
“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 PCB for “master unit”, “slave unit 1” and “slave unit 2” do not change.
or
Normal operation
Starting
control
Outdoor unit
rotation
Priority
1
Priority
2
Priority
3
Normal operation
Outdoor unit
rotation
Priority
3
Priority
1
Priority
2
Normal operation
Priority
1
Priority
2
Priority
3
Master Slave 1 Slave 2
Master Slave 1 Slave 2
Master Slave 1 Slave 2
Any of outdoor
unit stops for a
period of 20
minutes or more.
<In Heating>
Summary of Contents for RQYQ140-180PY1
Page 216: ...Piping Diagrams SiBE341001 207 Appendix 1 2 BS Unit BSVQ100 160 250PV1 4D057985B...
Page 217: ...SiBE341001 Piping Diagrams Appendix 208 BSV4Q100PV1 3D064148...
Page 218: ...Piping Diagrams SiBE341001 209 Appendix BSV6Q100PV1 3D064149...
Page 220: ...Wiring Diagrams for Reference SiBE341001 211 Appendix 2 2 BS Unit BSVQ100 160 250PV1 3D055928C...
Page 221: ...SiBE341001 Wiring Diagrams for Reference Appendix 212 BSV4Q100PV1 3D063928B...
Page 222: ...Wiring Diagrams for Reference SiBE341001 213 Appendix BSV6Q100PV1 3D063929B...
Page 223: ...SiBE341001 Option List Appendix 214 3 Option List 3 1 Option Lists Outdoor Unit 3D066354...
