Operation Mode - Daikin VRV III REYQ8PY1 Service Manual

Function General
1.2

Operation Mode

Operation in
stop mode
Indoor unit
stop or
thermostat
Pressure egualization
OFF
prior to startup
Thermostat ON
Rotation
Cooling
startup
Normal operation
Compressor PI control
Motorized valve PI control
Protection control
∗ "Oil return", "Defrost" and "Mode changeover" move on to the next process after the completion of
above function in progress even if the thermostat is OFF during the operation.
98
Thermostat ON
Operation
mode
changeover
Malfunction/
Stanby
Heating
startup
After completion of
startup control
Large capacity
startup
in
operation
Oil return IN
Yes
conditions are met
No
Yes
Defrost IN
conditions are met
No
Yes

Operation mode

changeover
No
Indoor unit stop
or thermostat OFF
Thermostat ON
Malfunction/
Stanby
Indoor unit stop
or thermostat OFF
Malfunction/
Stanby
Oil return
operation∗
Defrosting
operation∗
Operation mode
changeover
Si37-701
Restart
stanby
Malfunction/
Stanby
Pump-down
residual
operation
Operation
mode
changeover
Indoor unit stop
or thermostat
OFF
Mode
∗
changeover
Malfunction/Stand by
Function