Daikin RXYQ-TA Series Service Manual page 80

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