Daikin VRV S RXQ4/5ARV1 - Control for 4;5;10;12 HP Outdoor Unit

SiAF332111E Control for 4/5/10/12 HP Outdoor Unit
Part 4 Functions and Control 55
Note(s)
1. Control for 4/5/10/12 HP Outdoor Unit
1.1 Operation Mode
If the indoor unit stops or the thermostat turns OFF while in oil return control, pump down
residual control is performed on completion of oil return control.
Startup control
Oil return control
YES
NO
Error/Standby
Normal operation
Indoor unit thermostat ON
Indoor unit thermostat ON
Error/Standby
Error/Standby
Operation in
stop control
Pressure
equalization
prior to startup
Indoor unit stop or
thermostat OFF
Cooling operation
Oil return starting
conditions are met.
Indoor unit stop or
thermostat OFF
Indoor unit stop or
thermostat OFF
Error/
Standby
Pump down
residual
control
Restart standby
(Compressor stop)
• Cooling startup
control
• Compressor PI control
• Electronic expansion
valve PI control
• Protection control