Operation Mode - Daikin VRV II RXYQ5MATL Service Manual

Si39-504
1.2

Operation Mode

Indoor unit stop or
thermostat OFF
Startup control
• Cooling startup
control
• Heating startup
control
Normal operation
• Compressor PI control
• Motorized valve PI control
• Protection control
Defrost IN
conditions are met.
Function
Operation in
stop mode
Indoor unit thermostat ON
Pressure
equalization
prior to startup
Indoor unit thermostat ON
Outdoor unit
rotation
Cooling or heating
operation
Yes
Oil return IN
conditions are met.
No
Yes
No
Yes

Operation mode

changeover
No
Malfunction/Standby
Indoor unit stop or
thermostat OFF
Malfunction/Standby
Indoor unit stop or
thermostat OFF
Malfunction/
Standby
Defrosting operation
*)
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.
Restart standby
(Compressor stop)
Pump-down
residual
operation
Oil return operation
Outdoor unit
rotation
Function general
Malfunction/
Standby
67