Operation Mode - Daikin REYQ72 Serveice Manual

SiUS39-602
1.2

Operation Mode

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

Operation mode

change
No
Malfunction/Standby
Indoor unit stop or
thermostat OFF
Indoor unit stop or
thermostat OFF
Malfunction/
Standby
Oil return operation
Defrosting operation
Pressure
equalization
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
Pump-down
residual
operation
Outdoor unit
rotation
39