Daikin RXYQ-TA Series, Service Manual

Page: 80 / 337

Special Control SiUS341615E
67 Functions and Control
Example) The following diagram shows outdoor unit rotation in combination of 3 outdoor units.
Note: 1. “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.
Normal operation
Priority
1
Priority
2
Priority
3
Priority
3
Priority
1
Priority
2
Normal operation
Normal operation
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 outdoor
unit stops for a
period of 20
minutes or more. Heating
Startup
control
Outdoor unit
rotation
Oil return operation
or defrost
operation
Outdoor unit
rotation
Outdoor unit
rotation
Normal operation
Priority
1
Priority
2
Priority
3
Normal operation
Priority
2
Priority
3
Priority
1
Master Slave 1 Slave 2 Master Slave 1 Slave 2
·
There are outdoor
units that stop
operation.
Cooling
OR
·
Low pressure of all
outdoor units in operation
< 0.25 MPa (36.3 psi)
Outdoor unit
rotation