Operation Mode - Daikin VRV III RXYQ5-54PY1 Service Manual

Si34-601A
1.2

Operation Mode

Indoor unit stop or
thermostat OFF

Operation mode

changeover
(After completion of
startup control)
Normal operation
• Compressor PI control
• Motorized valve PI control
• Protection control
Function
Operation in
stop mode
Indoor unit thermostat ON
Pressure
equalization
prior to startup
Startup control
• Cooling startup control
• Heating startup control
Operation
After completion of
mode
startup control
changeover
Heating
Large capacity
startup
Cooling
in operation
Yes
Oil return IN
conditions are met.
No
Yes
Defrost IN
conditions are met.
No
Malfunction/Standby (Retry)
Indoor unit stop or
thermostat OFF
Indoor unit thermostat ON
Malfunction/
Standby (Retry)
Indoor unit stop or
thermostat OFF
Malfunction/
Standby (Retry)
Oil return operation
Defrosting operation
Operation mode changeover
(after completion of oil return
or defrost control)
*)
In the event indoor unit stops or
the thermostat turns OFF while in
oil return operation or defrosting
operation, pump-down residual
operation is performed on
completion of the oil return
operation or defrosting operation.
Function general
Restart standby
(Compressor stop)
Malfunction/
Standby
(Retry)
Pump-down
residual
operation
Indoor unit stop or
thermostat off (After
completion of oil return
or defrost control)
Outdoor unit
rotation
93