Function Flowchart - Daikin VRV X RXQ6-48ANR Series Service Manual

SiME341909EA

1. Function Flowchart

For detailed description of each function in the flow, refer to the details on related function on
the following pages.
Stop control
(1) Abnormal shutdown
(2) Slave unit stops during master unit operation
Standby control
(1) Restart standby
Startup control
(including pressure equalization before startup)
(1) Cooling startup control
Normal control
(1) List of functions in normal control
(2) Compressor control
(3) Compressor capacity control
(4) Operating priority and rotation of
compressors
(5) Compressor step control
(6) Step control of outdoor fans
Protection control
(1) High pressure protection control
(2) Low pressure protection control
(3) Discharge pipe protection control
(4) Compressor body protection control
(5) Inverter protection control
Note(s)
1. If the indoor unit stops or the thermostat turns OFF while in oil return control, pump
down residual operation is performed on completion of the oil return control.
Part 4 Functions and Control
Thermostat ON
Thermostat
ON
End of
startup
control
Conditions met for oil return
Function Flowchart
Special control
Thermostat OFF
(1) Outdoor unit rotation
(2) Oil return control (note 1)
(3) Inverter pre-heat control
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